models/research/object_detection/inputs_test.py

# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Tests for object_detection.tflearn.inputs."""

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import functools
import os
import unittest
from absl import logging
from absl.testing import parameterized
import numpy as np
import six
import tensorflow.compat.v1 as tf

from object_detection import inputs
from object_detection.core import preprocessor
from object_detection.core import standard_fields as fields
from object_detection.utils import config_util
from object_detection.utils import test_case
from object_detection.utils import test_utils
from object_detection.utils import tf_version

if six.PY2:
  import mock  # pylint: disable=g-import-not-at-top
else:
  from unittest import mock  # pylint: disable=g-import-not-at-top, g-importing-member

FLAGS = tf.flags.FLAGS


def _get_configs_for_model(model_name):
  """Returns configurations for model."""
  fname = os.path.join(tf.resource_loader.get_data_files_path(),
                       'samples/configs/' + model_name + '.config')
  label_map_path = os.path.join(tf.resource_loader.get_data_files_path(),
                                'data/pet_label_map.pbtxt')
  data_path = os.path.join(tf.resource_loader.get_data_files_path(),
                           'test_data/pets_examples.record')
  configs = config_util.get_configs_from_pipeline_file(fname)
  override_dict = {
      'train_input_path': data_path,
      'eval_input_path': data_path,
      'label_map_path': label_map_path
  }
  return config_util.merge_external_params_with_configs(
      configs, kwargs_dict=override_dict)


def _get_configs_for_model_sequence_example(model_name):
  """Returns configurations for model."""
  fname = os.path.join(tf.resource_loader.get_data_files_path(),
                       'test_data/' + model_name + '.config')
  label_map_path = os.path.join(tf.resource_loader.get_data_files_path(),
                                'data/snapshot_serengeti_label_map.pbtxt')
  data_path = os.path.join(
      tf.resource_loader.get_data_files_path(),
      'test_data/snapshot_serengeti_sequence_examples.record')
  configs = config_util.get_configs_from_pipeline_file(fname)
  override_dict = {
      'train_input_path': data_path,
      'eval_input_path': data_path,
      'label_map_path': label_map_path
  }
  return config_util.merge_external_params_with_configs(
      configs, kwargs_dict=override_dict)


def _make_initializable_iterator(dataset):
  """Creates an iterator, and initializes tables.

  Args:
    dataset: A `tf.data.Dataset` object.

  Returns:
    A `tf.data.Iterator`.
  """
  iterator = tf.data.make_initializable_iterator(dataset)
  tf.add_to_collection(tf.GraphKeys.TABLE_INITIALIZERS, iterator.initializer)
  return iterator


@unittest.skipIf(tf_version.is_tf2(), 'Skipping TF1.X only tests under TF2.X.')
class InputFnTest(test_case.TestCase, parameterized.TestCase):

  def test_faster_rcnn_resnet50_train_input(self):
    """Tests the training input function for FasterRcnnResnet50."""
    configs = _get_configs_for_model('faster_rcnn_resnet50_pets')
    model_config = configs['model']
    model_config.faster_rcnn.num_classes = 37
    train_input_fn = inputs.create_train_input_fn(
        configs['train_config'], configs['train_input_config'], model_config)
    features, labels = _make_initializable_iterator(train_input_fn()).get_next()

    self.assertAllEqual([1, None, None, 3],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual([1],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [1, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [1, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [1, 100],
        labels[fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_weights].dtype)
    self.assertAllEqual(
        [1, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_confidences].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_confidences].dtype)

  def test_faster_rcnn_resnet50_train_input_with_additional_channels(self):
    """Tests the training input function for FasterRcnnResnet50."""
    configs = _get_configs_for_model('faster_rcnn_resnet50_pets')
    model_config = configs['model']
    configs['train_input_config'].num_additional_channels = 2
    configs['train_config'].retain_original_images = True
    model_config.faster_rcnn.num_classes = 37
    train_input_fn = inputs.create_train_input_fn(
        configs['train_config'], configs['train_input_config'], model_config)
    features, labels = _make_initializable_iterator(train_input_fn()).get_next()

    self.assertAllEqual([1, None, None, 5],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertAllEqual(
        [1, None, None, 3],
        features[fields.InputDataFields.original_image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual([1],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [1, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [1, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [1, 100],
        labels[fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_weights].dtype)
    self.assertAllEqual(
        [1, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_confidences].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_confidences].dtype)

  @parameterized.parameters(
      {'eval_batch_size': 1},
      {'eval_batch_size': 8}
  )
  def test_faster_rcnn_resnet50_eval_input(self, eval_batch_size=1):
    """Tests the eval input function for FasterRcnnResnet50."""
    configs = _get_configs_for_model('faster_rcnn_resnet50_pets')
    model_config = configs['model']
    model_config.faster_rcnn.num_classes = 37
    eval_config = configs['eval_config']
    eval_config.batch_size = eval_batch_size
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config, configs['eval_input_configs'][0], model_config)
    features, labels = _make_initializable_iterator(eval_input_fn()).get_next()
    self.assertAllEqual([eval_batch_size, None, None, 3],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual(
        [eval_batch_size, None, None, 3],
        features[fields.InputDataFields.original_image].shape.as_list())
    self.assertEqual(tf.uint8,
                     features[fields.InputDataFields.original_image].dtype)
    self.assertAllEqual([eval_batch_size],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_weights].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_area].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_area].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_is_crowd].shape.as_list())
    self.assertEqual(
        tf.bool, labels[fields.InputDataFields.groundtruth_is_crowd].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_difficult].shape.as_list())
    self.assertEqual(
        tf.int32, labels[fields.InputDataFields.groundtruth_difficult].dtype)

  def test_context_rcnn_resnet50_train_input_with_sequence_example(
      self, train_batch_size=8):
    """Tests the training input function for FasterRcnnResnet50."""
    configs = _get_configs_for_model_sequence_example(
        'context_rcnn_camera_trap')
    model_config = configs['model']
    train_config = configs['train_config']
    train_config.batch_size = train_batch_size
    train_input_fn = inputs.create_train_input_fn(
        train_config, configs['train_input_config'], model_config)
    features, labels = _make_initializable_iterator(train_input_fn()).get_next()

    self.assertAllEqual([train_batch_size, 640, 640, 3],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual([train_batch_size],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [train_batch_size, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [train_batch_size, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [train_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_weights].dtype)
    self.assertAllEqual(
        [train_batch_size, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_confidences].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_confidences].dtype)

  def test_context_rcnn_resnet50_eval_input_with_sequence_example(
      self, eval_batch_size=8):
    """Tests the eval input function for FasterRcnnResnet50."""
    configs = _get_configs_for_model_sequence_example(
        'context_rcnn_camera_trap')
    model_config = configs['model']
    eval_config = configs['eval_config']
    eval_config.batch_size = eval_batch_size
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config, configs['eval_input_configs'][0], model_config)
    features, labels = _make_initializable_iterator(eval_input_fn()).get_next()
    self.assertAllEqual([eval_batch_size, 640, 640, 3],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual(
        [eval_batch_size, 640, 640, 3],
        features[fields.InputDataFields.original_image].shape.as_list())
    self.assertEqual(tf.uint8,
                     features[fields.InputDataFields.original_image].dtype)
    self.assertAllEqual([eval_batch_size],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, model_config.faster_rcnn.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_weights].dtype)

  def test_ssd_inceptionV2_train_input(self):
    """Tests the training input function for SSDInceptionV2."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    model_config = configs['model']
    model_config.ssd.num_classes = 37
    batch_size = configs['train_config'].batch_size
    train_input_fn = inputs.create_train_input_fn(
        configs['train_config'], configs['train_input_config'], model_config)
    features, labels = _make_initializable_iterator(train_input_fn()).get_next()

    self.assertAllEqual([batch_size, 300, 300, 3],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual([batch_size],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [batch_size],
        labels[fields.InputDataFields.num_groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.int32,
                     labels[fields.InputDataFields.num_groundtruth_boxes].dtype)
    self.assertAllEqual(
        [batch_size, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [batch_size, 100, model_config.ssd.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [batch_size, 100],
        labels[
            fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_weights].dtype)

  @parameterized.parameters(
      {'eval_batch_size': 1},
      {'eval_batch_size': 8}
  )
  def test_ssd_inceptionV2_eval_input(self, eval_batch_size=1):
    """Tests the eval input function for SSDInceptionV2."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    model_config = configs['model']
    model_config.ssd.num_classes = 37
    eval_config = configs['eval_config']
    eval_config.batch_size = eval_batch_size
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config, configs['eval_input_configs'][0], model_config)
    features, labels = _make_initializable_iterator(eval_input_fn()).get_next()
    self.assertAllEqual([eval_batch_size, 300, 300, 3],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual(
        [eval_batch_size, 300, 300, 3],
        features[fields.InputDataFields.original_image].shape.as_list())
    self.assertEqual(tf.uint8,
                     features[fields.InputDataFields.original_image].dtype)
    self.assertAllEqual([eval_batch_size],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, model_config.ssd.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[
            fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(
        tf.float32,
        labels[fields.InputDataFields.groundtruth_weights].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_area].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_area].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_is_crowd].shape.as_list())
    self.assertEqual(
        tf.bool, labels[fields.InputDataFields.groundtruth_is_crowd].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_difficult].shape.as_list())
    self.assertEqual(
        tf.int32, labels[fields.InputDataFields.groundtruth_difficult].dtype)

  def test_ssd_inceptionV2_eval_input_with_additional_channels(
      self, eval_batch_size=1):
    """Tests the eval input function for SSDInceptionV2 with additional channel.

    Args:
      eval_batch_size: Batch size for eval set.
    """
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    model_config = configs['model']
    model_config.ssd.num_classes = 37
    configs['eval_input_configs'][0].num_additional_channels = 1
    eval_config = configs['eval_config']
    eval_config.batch_size = eval_batch_size
    eval_config.retain_original_image_additional_channels = True
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config, configs['eval_input_configs'][0], model_config)
    features, labels = _make_initializable_iterator(eval_input_fn()).get_next()
    self.assertAllEqual([eval_batch_size, 300, 300, 4],
                        features[fields.InputDataFields.image].shape.as_list())
    self.assertEqual(tf.float32, features[fields.InputDataFields.image].dtype)
    self.assertAllEqual(
        [eval_batch_size, 300, 300, 3],
        features[fields.InputDataFields.original_image].shape.as_list())
    self.assertEqual(tf.uint8,
                     features[fields.InputDataFields.original_image].dtype)
    self.assertAllEqual([eval_batch_size, 300, 300, 1], features[
        fields.InputDataFields.image_additional_channels].shape.as_list())
    self.assertEqual(
        tf.uint8,
        features[fields.InputDataFields.image_additional_channels].dtype)
    self.assertAllEqual([eval_batch_size],
                        features[inputs.HASH_KEY].shape.as_list())
    self.assertEqual(tf.int32, features[inputs.HASH_KEY].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, 4],
        labels[fields.InputDataFields.groundtruth_boxes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_boxes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100, model_config.ssd.num_classes],
        labels[fields.InputDataFields.groundtruth_classes].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_classes].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_weights].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_weights].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_area].shape.as_list())
    self.assertEqual(tf.float32,
                     labels[fields.InputDataFields.groundtruth_area].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_is_crowd].shape.as_list())
    self.assertEqual(tf.bool,
                     labels[fields.InputDataFields.groundtruth_is_crowd].dtype)
    self.assertAllEqual(
        [eval_batch_size, 100],
        labels[fields.InputDataFields.groundtruth_difficult].shape.as_list())
    self.assertEqual(tf.int32,
                     labels[fields.InputDataFields.groundtruth_difficult].dtype)

  def test_predict_input(self):
    """Tests the predict input function."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    predict_input_fn = inputs.create_predict_input_fn(
        model_config=configs['model'],
        predict_input_config=configs['eval_input_configs'][0])
    serving_input_receiver = predict_input_fn()

    image = serving_input_receiver.features[fields.InputDataFields.image]
    receiver_tensors = serving_input_receiver.receiver_tensors[
        inputs.SERVING_FED_EXAMPLE_KEY]
    self.assertEqual([1, 300, 300, 3], image.shape.as_list())
    self.assertEqual(tf.float32, image.dtype)
    self.assertEqual(tf.string, receiver_tensors.dtype)

  def test_predict_input_with_additional_channels(self):
    """Tests the predict input function with additional channels."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['eval_input_configs'][0].num_additional_channels = 2
    predict_input_fn = inputs.create_predict_input_fn(
        model_config=configs['model'],
        predict_input_config=configs['eval_input_configs'][0])
    serving_input_receiver = predict_input_fn()

    image = serving_input_receiver.features[fields.InputDataFields.image]
    receiver_tensors = serving_input_receiver.receiver_tensors[
        inputs.SERVING_FED_EXAMPLE_KEY]
    # RGB + 2 additional channels = 5 channels.
    self.assertEqual([1, 300, 300, 5], image.shape.as_list())
    self.assertEqual(tf.float32, image.dtype)
    self.assertEqual(tf.string, receiver_tensors.dtype)

  def test_error_with_bad_train_config(self):
    """Tests that a TypeError is raised with improper train config."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['model'].ssd.num_classes = 37
    train_input_fn = inputs.create_train_input_fn(
        train_config=configs['eval_config'],  # Expecting `TrainConfig`.
        train_input_config=configs['train_input_config'],
        model_config=configs['model'])
    with self.assertRaises(TypeError):
      train_input_fn()

  def test_error_with_bad_train_input_config(self):
    """Tests that a TypeError is raised with improper train input config."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['model'].ssd.num_classes = 37
    train_input_fn = inputs.create_train_input_fn(
        train_config=configs['train_config'],
        train_input_config=configs['model'],  # Expecting `InputReader`.
        model_config=configs['model'])
    with self.assertRaises(TypeError):
      train_input_fn()

  def test_error_with_bad_train_model_config(self):
    """Tests that a TypeError is raised with improper train model config."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['model'].ssd.num_classes = 37
    train_input_fn = inputs.create_train_input_fn(
        train_config=configs['train_config'],
        train_input_config=configs['train_input_config'],
        model_config=configs['train_config'])  # Expecting `DetectionModel`.
    with self.assertRaises(TypeError):
      train_input_fn()

  def test_error_with_bad_eval_config(self):
    """Tests that a TypeError is raised with improper eval config."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['model'].ssd.num_classes = 37
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config=configs['train_config'],  # Expecting `EvalConfig`.
        eval_input_config=configs['eval_input_configs'][0],
        model_config=configs['model'])
    with self.assertRaises(TypeError):
      eval_input_fn()

  def test_error_with_bad_eval_input_config(self):
    """Tests that a TypeError is raised with improper eval input config."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['model'].ssd.num_classes = 37
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config=configs['eval_config'],
        eval_input_config=configs['model'],  # Expecting `InputReader`.
        model_config=configs['model'])
    with self.assertRaises(TypeError):
      eval_input_fn()

  def test_error_with_bad_eval_model_config(self):
    """Tests that a TypeError is raised with improper eval model config."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['model'].ssd.num_classes = 37
    eval_input_fn = inputs.create_eval_input_fn(
        eval_config=configs['eval_config'],
        eval_input_config=configs['eval_input_configs'][0],
        model_config=configs['eval_config'])  # Expecting `DetectionModel`.
    with self.assertRaises(TypeError):
      eval_input_fn()

  def test_output_equal_in_replace_empty_string_with_random_number(self):
    string_placeholder = tf.placeholder(tf.string, shape=[])
    replaced_string = inputs._replace_empty_string_with_random_number(
        string_placeholder)

    test_string = b'hello world'
    feed_dict = {string_placeholder: test_string}

    with self.test_session() as sess:
      out_string = sess.run(replaced_string, feed_dict=feed_dict)

    self.assertEqual(test_string, out_string)

  def test_output_is_integer_in_replace_empty_string_with_random_number(self):

    string_placeholder = tf.placeholder(tf.string, shape=[])
    replaced_string = inputs._replace_empty_string_with_random_number(
        string_placeholder)

    empty_string = ''
    feed_dict = {string_placeholder: empty_string}
    with self.test_session() as sess:
      out_string = sess.run(replaced_string, feed_dict=feed_dict)

    is_integer = True
    try:
      # Test whether out_string is a string which represents an integer, the
      # casting below will throw an error if out_string is not castable to int.
      int(out_string)
    except ValueError:
      is_integer = False

    self.assertTrue(is_integer)

  def test_force_no_resize(self):
    """Tests the functionality of force_no_reisze option."""
    configs = _get_configs_for_model('ssd_inception_v2_pets')
    configs['eval_config'].force_no_resize = True

    eval_input_fn = inputs.create_eval_input_fn(
        eval_config=configs['eval_config'],
        eval_input_config=configs['eval_input_configs'][0],
        model_config=configs['model']
    )
    train_input_fn = inputs.create_train_input_fn(
        train_config=configs['train_config'],
        train_input_config=configs['train_input_config'],
        model_config=configs['model']
    )

    features_train, _ = _make_initializable_iterator(
        train_input_fn()).get_next()

    features_eval, _ = _make_initializable_iterator(
        eval_input_fn()).get_next()

    images_train, images_eval = features_train['image'], features_eval['image']

    self.assertEqual([1, None, None, 3], images_eval.shape.as_list())
    self.assertEqual([24, 300, 300, 3], images_train.shape.as_list())


class DataAugmentationFnTest(test_case.TestCase):

  def test_apply_image_and_box_augmentation(self):
    data_augmentation_options = [
        (preprocessor.resize_image, {
            'new_height': 20,
            'new_width': 20,
            'method': tf.image.ResizeMethod.NEAREST_NEIGHBOR
        }),
        (preprocessor.scale_boxes_to_pixel_coordinates, {}),
    ]
    data_augmentation_fn = functools.partial(
        inputs.augment_input_data,
        data_augmentation_options=data_augmentation_options)
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(10, 10, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1., 1.]], np.float32))
      }
      augmented_tensor_dict = data_augmentation_fn(tensor_dict=tensor_dict)
      return (augmented_tensor_dict[fields.InputDataFields.image],
              augmented_tensor_dict[fields.InputDataFields.
                                    groundtruth_boxes])
    image, groundtruth_boxes = self.execute_cpu(graph_fn, [])
    self.assertAllEqual(image.shape, [20, 20, 3])
    self.assertAllClose(groundtruth_boxes, [[10, 10, 20, 20]])

  def test_apply_image_and_box_augmentation_with_scores(self):
    data_augmentation_options = [
        (preprocessor.resize_image, {
            'new_height': 20,
            'new_width': 20,
            'method': tf.image.ResizeMethod.NEAREST_NEIGHBOR
        }),
        (preprocessor.scale_boxes_to_pixel_coordinates, {}),
    ]
    data_augmentation_fn = functools.partial(
        inputs.augment_input_data,
        data_augmentation_options=data_augmentation_options)
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(10, 10, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1., 1.]], np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([1.0], np.float32)),
          fields.InputDataFields.groundtruth_weights:
              tf.constant(np.array([0.8], np.float32)),
      }
      augmented_tensor_dict = data_augmentation_fn(tensor_dict=tensor_dict)
      return (augmented_tensor_dict[fields.InputDataFields.image],
              augmented_tensor_dict[fields.InputDataFields.groundtruth_boxes],
              augmented_tensor_dict[fields.InputDataFields.groundtruth_classes],
              augmented_tensor_dict[fields.InputDataFields.groundtruth_weights])
    (image, groundtruth_boxes,
     groundtruth_classes, groundtruth_weights) = self.execute_cpu(graph_fn, [])
    self.assertAllEqual(image.shape, [20, 20, 3])
    self.assertAllClose(groundtruth_boxes, [[10, 10, 20, 20]])
    self.assertAllClose(groundtruth_classes.shape, [1.0])
    self.assertAllClose(groundtruth_weights, [0.8])

  def test_include_masks_in_data_augmentation(self):
    data_augmentation_options = [
        (preprocessor.resize_image, {
            'new_height': 20,
            'new_width': 20,
            'method': tf.image.ResizeMethod.NEAREST_NEIGHBOR
        })
    ]
    data_augmentation_fn = functools.partial(
        inputs.augment_input_data,
        data_augmentation_options=data_augmentation_options)
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(10, 10, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_instance_masks:
              tf.constant(np.zeros([2, 10, 10], np.uint8))
      }
      augmented_tensor_dict = data_augmentation_fn(tensor_dict=tensor_dict)
      return (augmented_tensor_dict[fields.InputDataFields.image],
              augmented_tensor_dict[fields.InputDataFields.
                                    groundtruth_instance_masks])
    image, masks = self.execute_cpu(graph_fn, [])
    self.assertAllEqual(image.shape, [20, 20, 3])
    self.assertAllEqual(masks.shape, [2, 20, 20])

  def test_include_keypoints_in_data_augmentation(self):
    data_augmentation_options = [
        (preprocessor.resize_image, {
            'new_height': 20,
            'new_width': 20,
            'method': tf.image.ResizeMethod.NEAREST_NEIGHBOR
        }),
        (preprocessor.scale_boxes_to_pixel_coordinates, {}),
    ]
    data_augmentation_fn = functools.partial(
        inputs.augment_input_data,
        data_augmentation_options=data_augmentation_options)
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(10, 10, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1., 1.]], np.float32)),
          fields.InputDataFields.groundtruth_keypoints:
              tf.constant(np.array([[[0.5, 1.0], [0.5, 0.5]]], np.float32))
      }
      augmented_tensor_dict = data_augmentation_fn(tensor_dict=tensor_dict)
      return (augmented_tensor_dict[fields.InputDataFields.image],
              augmented_tensor_dict[fields.InputDataFields.groundtruth_boxes],
              augmented_tensor_dict[fields.InputDataFields.
                                    groundtruth_keypoints])
    image, boxes, keypoints = self.execute_cpu(graph_fn, [])
    self.assertAllEqual(image.shape, [20, 20, 3])
    self.assertAllClose(boxes, [[10, 10, 20, 20]])
    self.assertAllClose(keypoints, [[[10, 20], [10, 10]]])


def _fake_model_preprocessor_fn(image):
  return (image, tf.expand_dims(tf.shape(image)[1:], axis=0))


def _fake_image_resizer_fn(image, mask):
  return (image, mask, tf.shape(image))


def _fake_resize50_preprocess_fn(image):
  image = image[0]
  image, shape = preprocessor.resize_to_range(
      image, min_dimension=50, max_dimension=50, pad_to_max_dimension=True)

  return tf.expand_dims(image, 0), tf.expand_dims(shape, axis=0)


class DataTransformationFnTest(test_case.TestCase, parameterized.TestCase):

  def test_combine_additional_channels_if_present(self):
    image = np.random.rand(4, 4, 3).astype(np.float32)
    additional_channels = np.random.rand(4, 4, 2).astype(np.float32)
    def graph_fn(image, additional_channels):
      tensor_dict = {
          fields.InputDataFields.image: image,
          fields.InputDataFields.image_additional_channels: additional_channels,
          fields.InputDataFields.groundtruth_classes:
              tf.constant([1, 1], tf.int32)
      }

      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=1)
      out_tensors = input_transformation_fn(tensor_dict=tensor_dict)
      return out_tensors[fields.InputDataFields.image]
    out_image = self.execute_cpu(graph_fn, [image, additional_channels])
    self.assertAllEqual(out_image.dtype, tf.float32)
    self.assertAllEqual(out_image.shape, [4, 4, 5])
    self.assertAllClose(out_image, np.concatenate((image, additional_channels),
                                                  axis=2))

  def test_use_multiclass_scores_when_present(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image: tf.constant(np.random.rand(4, 4, 3).
                                                    astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1, 1], [.5, .5, 1, 1]],
                                   np.float32)),
          fields.InputDataFields.multiclass_scores:
              tf.constant(np.array([0.2, 0.3, 0.5, 0.1, 0.6, 0.3], np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([1, 2], np.int32))
      }

      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=3, use_multiclass_scores=True)
      transformed_inputs = input_transformation_fn(tensor_dict=tensor_dict)
      return transformed_inputs[fields.InputDataFields.groundtruth_classes]
    groundtruth_classes = self.execute_cpu(graph_fn, [])
    self.assertAllClose(
        np.array([[0.2, 0.3, 0.5], [0.1, 0.6, 0.3]], np.float32),
        groundtruth_classes)

  @unittest.skipIf(tf_version.is_tf2(), ('Skipping due to different behaviour '
                                         'in TF 2.X'))
  def test_use_multiclass_scores_when_not_present(self):
    def graph_fn():
      zero_num_elements = tf.random.uniform([], minval=0, maxval=1,
                                            dtype=tf.int32)
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(4, 4, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1, 1], [.5, .5, 1, 1]],
                                   np.float32)),
          fields.InputDataFields.multiclass_scores: tf.zeros(zero_num_elements),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([1, 2], np.int32))
      }

      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=3, use_multiclass_scores=True)

      transformed_inputs = input_transformation_fn(tensor_dict=tensor_dict)
      return transformed_inputs[fields.InputDataFields.groundtruth_classes]
    groundtruth_classes = self.execute_cpu(graph_fn, [])
    self.assertAllClose(
        np.array([[0, 1, 0], [0, 0, 1]], np.float32),
        groundtruth_classes)

  @parameterized.parameters(
      {'labeled_classes': [1, 2]},
      {'labeled_classes': []},
      {'labeled_classes': [1, -1, 2]}  # -1 denotes an unrecognized class
  )
  def test_use_labeled_classes(self, labeled_classes):

    def compute_fn(image, groundtruth_boxes, groundtruth_classes,
                   groundtruth_labeled_classes):
      tensor_dict = {
          fields.InputDataFields.image:
              image,
          fields.InputDataFields.groundtruth_boxes:
              groundtruth_boxes,
          fields.InputDataFields.groundtruth_classes:
              groundtruth_classes,
          fields.InputDataFields.groundtruth_labeled_classes:
              groundtruth_labeled_classes
      }

      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=3)
      return input_transformation_fn(tensor_dict=tensor_dict)

    image = np.random.rand(4, 4, 3).astype(np.float32)
    groundtruth_boxes = np.array([[.5, .5, 1, 1], [.5, .5, 1, 1]], np.float32)
    groundtruth_classes = np.array([1, 2], np.int32)
    groundtruth_labeled_classes = np.array(labeled_classes, np.int32)

    transformed_inputs = self.execute_cpu(compute_fn, [
        image, groundtruth_boxes, groundtruth_classes,
        groundtruth_labeled_classes
    ])

    if labeled_classes == [1, 2] or labeled_classes == [1, -1, 2]:
      transformed_labeled_classes = [1, 1, 0]
    elif not labeled_classes:
      transformed_labeled_classes = [1, 1, 1]
    else:
      logging.exception('Unexpected labeled_classes %r', labeled_classes)

    self.assertAllEqual(
        np.array(transformed_labeled_classes, np.float32),
        transformed_inputs[fields.InputDataFields.groundtruth_labeled_classes])

  def test_returns_correct_class_label_encodings(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(4, 4, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[0, 0, 1, 1], [.5, .5, 1, 1]], np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32))
      }
      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes)
      transformed_inputs = input_transformation_fn(tensor_dict=tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_classes],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_confidences])
    (groundtruth_classes, groundtruth_confidences) = self.execute_cpu(graph_fn,
                                                                      [])
    self.assertAllClose(groundtruth_classes, [[0, 0, 1], [1, 0, 0]])
    self.assertAllClose(groundtruth_confidences, [[0, 0, 1], [1, 0, 0]])

  def test_returns_correct_labels_with_unrecognized_class(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(4, 4, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(
                  np.array([[0, 0, 1, 1], [.2, .2, 4, 4], [.5, .5, 1, 1]],
                           np.float32)),
          fields.InputDataFields.groundtruth_area:
              tf.constant(np.array([.5, .4, .3])),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, -1, 1], np.int32)),
          fields.InputDataFields.groundtruth_keypoints:
              tf.constant(
                  np.array([[[.1, .1]], [[.2, .2]], [[.5, .5]]],
                           np.float32)),
          fields.InputDataFields.groundtruth_keypoint_visibilities:
              tf.constant([[True, True], [False, False], [True, True]]),
          fields.InputDataFields.groundtruth_instance_masks:
              tf.constant(np.random.rand(3, 4, 4).astype(np.float32)),
          fields.InputDataFields.groundtruth_is_crowd:
              tf.constant([False, True, False]),
          fields.InputDataFields.groundtruth_difficult:
              tf.constant(np.array([0, 0, 1], np.int32))
      }

      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_classes],
              transformed_inputs[fields.InputDataFields.num_groundtruth_boxes],
              transformed_inputs[fields.InputDataFields.groundtruth_area],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_confidences],
              transformed_inputs[fields.InputDataFields.groundtruth_boxes],
              transformed_inputs[fields.InputDataFields.groundtruth_keypoints],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_keypoint_visibilities],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_instance_masks],
              transformed_inputs[fields.InputDataFields.groundtruth_is_crowd],
              transformed_inputs[fields.InputDataFields.groundtruth_difficult])
    (groundtruth_classes, num_groundtruth_boxes, groundtruth_area,
     groundtruth_confidences, groundtruth_boxes, groundtruth_keypoints,
     groundtruth_keypoint_visibilities, groundtruth_instance_masks,
     groundtruth_is_crowd, groundtruth_difficult) = self.execute_cpu(graph_fn,
                                                                     [])

    self.assertAllClose(groundtruth_classes, [[0, 0, 1], [1, 0, 0]])
    self.assertAllEqual(num_groundtruth_boxes, 2)
    self.assertAllClose(groundtruth_area, [.5, .3])
    self.assertAllEqual(groundtruth_confidences, [[0, 0, 1], [1, 0, 0]])
    self.assertAllClose(groundtruth_boxes, [[0, 0, 1, 1], [.5, .5, 1, 1]])
    self.assertAllClose(groundtruth_keypoints, [[[.1, .1]], [[.5, .5]]])
    self.assertAllEqual(groundtruth_keypoint_visibilities,
                        [[True, True], [True, True]])
    self.assertAllEqual(groundtruth_instance_masks.shape, [2, 4, 4])
    self.assertAllEqual(groundtruth_is_crowd, [False, False])
    self.assertAllEqual(groundtruth_difficult, [0, 1])

  def test_returns_correct_merged_boxes(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(4, 4, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1, 1], [.5, .5, 1, 1]],
                                   np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32))
      }

      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes,
          merge_multiple_boxes=True)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_boxes],
              transformed_inputs[fields.InputDataFields.groundtruth_classes],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_confidences],
              transformed_inputs[fields.InputDataFields.num_groundtruth_boxes])
    (groundtruth_boxes, groundtruth_classes, groundtruth_confidences,
     num_groundtruth_boxes) = self.execute_cpu(graph_fn, [])
    self.assertAllClose(
        groundtruth_boxes,
        [[.5, .5, 1., 1.]])
    self.assertAllClose(
        groundtruth_classes,
        [[1, 0, 1]])
    self.assertAllClose(
        groundtruth_confidences,
        [[1, 0, 1]])
    self.assertAllClose(
        num_groundtruth_boxes,
        1)

  def test_returns_correct_groundtruth_confidences_when_input_present(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(4, 4, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[0, 0, 1, 1], [.5, .5, 1, 1]], np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32)),
          fields.InputDataFields.groundtruth_confidences:
              tf.constant(np.array([1.0, -1.0], np.float32))
      }
      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_classes],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_confidences])
    groundtruth_classes, groundtruth_confidences = self.execute_cpu(graph_fn,
                                                                    [])
    self.assertAllClose(
        groundtruth_classes,
        [[0, 0, 1], [1, 0, 0]])
    self.assertAllClose(
        groundtruth_confidences,
        [[0, 0, 1], [-1, 0, 0]])

  def test_returns_resized_masks(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(4, 4, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_instance_masks:
              tf.constant(np.random.rand(2, 4, 4).astype(np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32)),
          fields.InputDataFields.original_image_spatial_shape:
              tf.constant(np.array([4, 4], np.int32))
      }

      def fake_image_resizer_fn(image, masks=None):
        resized_image = tf.image.resize_images(image, [8, 8])
        results = [resized_image]
        if masks is not None:
          resized_masks = tf.transpose(
              tf.image.resize_images(tf.transpose(masks, [1, 2, 0]), [8, 8]),
              [2, 0, 1])
          results.append(resized_masks)
        results.append(tf.shape(resized_image))
        return results

      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=fake_image_resizer_fn,
          num_classes=num_classes,
          retain_original_image=True)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.original_image],
              transformed_inputs[fields.InputDataFields.
                                 original_image_spatial_shape],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_instance_masks])
    (original_image, original_image_shape,
     groundtruth_instance_masks) = self.execute_cpu(graph_fn, [])
    self.assertEqual(original_image.dtype, np.uint8)
    self.assertAllEqual(original_image_shape, [4, 4])
    self.assertAllEqual(original_image.shape, [8, 8, 3])
    self.assertAllEqual(groundtruth_instance_masks.shape, [2, 8, 8])

  def test_applies_model_preprocess_fn_to_image_tensor(self):
    np_image = np.random.randint(256, size=(4, 4, 3))
    def graph_fn(image):
      tensor_dict = {
          fields.InputDataFields.image: image,
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32))
      }

      def fake_model_preprocessor_fn(image):
        return (image / 255., tf.expand_dims(tf.shape(image)[1:], axis=0))

      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.image],
              transformed_inputs[fields.InputDataFields.true_image_shape])
    image, true_image_shape = self.execute_cpu(graph_fn, [np_image])
    self.assertAllClose(image, np_image / 255.)
    self.assertAllClose(true_image_shape, [4, 4, 3])

  def test_applies_data_augmentation_fn_to_tensor_dict(self):
    np_image = np.random.randint(256, size=(4, 4, 3))
    def graph_fn(image):
      tensor_dict = {
          fields.InputDataFields.image: image,
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32))
      }

      def add_one_data_augmentation_fn(tensor_dict):
        return {key: value + 1 for key, value in tensor_dict.items()}

      num_classes = 4
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes,
          data_augmentation_fn=add_one_data_augmentation_fn)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.image],
              transformed_inputs[fields.InputDataFields.groundtruth_classes])
    image, groundtruth_classes = self.execute_cpu(graph_fn, [np_image])
    self.assertAllEqual(image, np_image + 1)
    self.assertAllEqual(
        groundtruth_classes,
        [[0, 0, 0, 1], [0, 1, 0, 0]])

  def test_applies_data_augmentation_fn_before_model_preprocess_fn(self):
    np_image = np.random.randint(256, size=(4, 4, 3))
    def graph_fn(image):
      tensor_dict = {
          fields.InputDataFields.image: image,
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([3, 1], np.int32))
      }

      def mul_two_model_preprocessor_fn(image):
        return (image * 2, tf.expand_dims(tf.shape(image)[1:], axis=0))

      def add_five_to_image_data_augmentation_fn(tensor_dict):
        tensor_dict[fields.InputDataFields.image] += 5
        return tensor_dict

      num_classes = 4
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=mul_two_model_preprocessor_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes,
          data_augmentation_fn=add_five_to_image_data_augmentation_fn)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return transformed_inputs[fields.InputDataFields.image]
    image = self.execute_cpu(graph_fn, [np_image])
    self.assertAllEqual(image, (np_image + 5) * 2)

  def test_resize_with_padding(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(100, 50, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1, 1], [.0, .0, .5, .5]],
                                   np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([1, 2], np.int32)),
          fields.InputDataFields.groundtruth_keypoints:
              tf.constant([[[0.1, 0.2]], [[0.3, 0.4]]]),
      }

      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_resize50_preprocess_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes,)
      transformed_inputs = input_transformation_fn(tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_boxes],
              transformed_inputs[fields.InputDataFields.groundtruth_keypoints])
    groundtruth_boxes, groundtruth_keypoints = self.execute_cpu(graph_fn, [])
    self.assertAllClose(
        groundtruth_boxes,
        [[.5, .25, 1., .5], [.0, .0, .5, .25]])
    self.assertAllClose(
        groundtruth_keypoints,
        [[[.1, .1]], [[.3, .2]]])

  def test_groundtruth_keypoint_weights(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(100, 50, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1, 1], [.0, .0, .5, .5]],
                                   np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([1, 2], np.int32)),
          fields.InputDataFields.groundtruth_keypoints:
              tf.constant([[[0.1, 0.2], [0.3, 0.4]],
                           [[0.5, 0.6], [0.7, 0.8]]]),
          fields.InputDataFields.groundtruth_keypoint_visibilities:
              tf.constant([[True, False], [True, True]]),
      }

      num_classes = 3
      keypoint_type_weight = [1.0, 2.0]
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_resize50_preprocess_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes,
          keypoint_type_weight=keypoint_type_weight)
      transformed_inputs = input_transformation_fn(tensor_dict=tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_keypoints],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_keypoint_weights])

    groundtruth_keypoints, groundtruth_keypoint_weights = self.execute_cpu(
        graph_fn, [])
    self.assertAllClose(
        groundtruth_keypoints,
        [[[0.1, 0.1], [0.3, 0.2]],
         [[0.5, 0.3], [0.7, 0.4]]])
    self.assertAllClose(
        groundtruth_keypoint_weights,
        [[1.0, 0.0], [1.0, 2.0]])

  def test_groundtruth_keypoint_weights_default(self):
    def graph_fn():
      tensor_dict = {
          fields.InputDataFields.image:
              tf.constant(np.random.rand(100, 50, 3).astype(np.float32)),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant(np.array([[.5, .5, 1, 1], [.0, .0, .5, .5]],
                                   np.float32)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant(np.array([1, 2], np.int32)),
          fields.InputDataFields.groundtruth_keypoints:
              tf.constant([[[0.1, 0.2], [0.3, 0.4]],
                           [[0.5, 0.6], [0.7, 0.8]]]),
      }

      num_classes = 3
      input_transformation_fn = functools.partial(
          inputs.transform_input_data,
          model_preprocess_fn=_fake_resize50_preprocess_fn,
          image_resizer_fn=_fake_image_resizer_fn,
          num_classes=num_classes)
      transformed_inputs = input_transformation_fn(tensor_dict=tensor_dict)
      return (transformed_inputs[fields.InputDataFields.groundtruth_keypoints],
              transformed_inputs[fields.InputDataFields.
                                 groundtruth_keypoint_weights])
    groundtruth_keypoints, groundtruth_keypoint_weights = self.execute_cpu(
        graph_fn, [])
    self.assertAllClose(
        groundtruth_keypoints,
        [[[0.1, 0.1], [0.3, 0.2]],
         [[0.5, 0.3], [0.7, 0.4]]])
    self.assertAllClose(
        groundtruth_keypoint_weights,
        [[1.0, 1.0], [1.0, 1.0]])


class PadInputDataToStaticShapesFnTest(test_case.TestCase):

  def test_pad_images_boxes_and_classes(self):
    input_tensor_dict = {
        fields.InputDataFields.image:
            tf.random.uniform([3, 3, 3]),
        fields.InputDataFields.groundtruth_boxes:
            tf.random.uniform([2, 4]),
        fields.InputDataFields.groundtruth_classes:
            tf.random.uniform([2, 3], minval=0, maxval=2, dtype=tf.int32),
        fields.InputDataFields.true_image_shape:
            tf.constant([3, 3, 3]),
        fields.InputDataFields.original_image_spatial_shape:
            tf.constant([3, 3])
    }
    padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
        tensor_dict=input_tensor_dict,
        max_num_boxes=3,
        num_classes=3,
        spatial_image_shape=[5, 6])

    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.image].shape.as_list(),
        [5, 6, 3])
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.true_image_shape]
        .shape.as_list(), [3])
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.original_image_spatial_shape]
        .shape.as_list(), [2])
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.groundtruth_boxes]
        .shape.as_list(), [3, 4])
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.groundtruth_classes]
        .shape.as_list(), [3, 3])

  def test_clip_boxes_and_classes(self):
    def graph_fn():
      input_tensor_dict = {
          fields.InputDataFields.groundtruth_boxes:
              tf.random.uniform([5, 4]),
          fields.InputDataFields.groundtruth_classes:
              tf.random.uniform([2, 3], maxval=10, dtype=tf.int32),
          fields.InputDataFields.num_groundtruth_boxes:
              tf.constant(5)
      }
      padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
          tensor_dict=input_tensor_dict,
          max_num_boxes=3,
          num_classes=3,
          spatial_image_shape=[5, 6])
      return (padded_tensor_dict[fields.InputDataFields.groundtruth_boxes],
              padded_tensor_dict[fields.InputDataFields.groundtruth_classes],
              padded_tensor_dict[fields.InputDataFields.num_groundtruth_boxes])
    (groundtruth_boxes, groundtruth_classes,
     num_groundtruth_boxes) = self.execute_cpu(graph_fn, [])
    self.assertAllEqual(groundtruth_boxes.shape, [3, 4])
    self.assertAllEqual(groundtruth_classes.shape, [3, 3])
    self.assertEqual(num_groundtruth_boxes, 3)

  def test_images_and_additional_channels(self):
    input_tensor_dict = {
        fields.InputDataFields.image:
            test_utils.image_with_dynamic_shape(4, 3, 5),
        fields.InputDataFields.image_additional_channels:
            test_utils.image_with_dynamic_shape(4, 3, 2),
    }
    padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
        tensor_dict=input_tensor_dict,
        max_num_boxes=3,
        num_classes=3,
        spatial_image_shape=[5, 6])

    # pad_input_data_to_static_shape assumes that image is already concatenated
    # with additional channels.
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.image].shape.as_list(),
        [5, 6, 5])
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.image_additional_channels]
        .shape.as_list(), [5, 6, 2])

  def test_images_and_additional_channels_errors(self):
    input_tensor_dict = {
        fields.InputDataFields.image:
            test_utils.image_with_dynamic_shape(10, 10, 3),
        fields.InputDataFields.image_additional_channels:
            test_utils.image_with_dynamic_shape(10, 10, 2),
        fields.InputDataFields.original_image:
            test_utils.image_with_dynamic_shape(10, 10, 3),
    }
    with self.assertRaises(ValueError):
      _ = inputs.pad_input_data_to_static_shapes(
          tensor_dict=input_tensor_dict,
          max_num_boxes=3,
          num_classes=3,
          spatial_image_shape=[5, 6])

  def test_gray_images(self):
    input_tensor_dict = {
        fields.InputDataFields.image:
            test_utils.image_with_dynamic_shape(4, 4, 1),
    }
    padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
        tensor_dict=input_tensor_dict,
        max_num_boxes=3,
        num_classes=3,
        spatial_image_shape=[5, 6])

    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.image].shape.as_list(),
        [5, 6, 1])

  def test_gray_images_and_additional_channels(self):
    input_tensor_dict = {
        fields.InputDataFields.image:
            test_utils.image_with_dynamic_shape(4, 4, 3),
        fields.InputDataFields.image_additional_channels:
            test_utils.image_with_dynamic_shape(4, 4, 2),
    }
    # pad_input_data_to_static_shape assumes that image is already concatenated
    # with additional channels.
    padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
        tensor_dict=input_tensor_dict,
        max_num_boxes=3,
        num_classes=3,
        spatial_image_shape=[5, 6])

    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.image].shape.as_list(),
        [5, 6, 3])
    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.image_additional_channels]
        .shape.as_list(), [5, 6, 2])

  def test_keypoints(self):
    keypoints = test_utils.keypoints_with_dynamic_shape(10, 16, 4)
    visibilities = tf.cast(tf.random.uniform(tf.shape(keypoints)[:-1], minval=0,
                                             maxval=2, dtype=tf.int32), tf.bool)
    input_tensor_dict = {
        fields.InputDataFields.groundtruth_keypoints:
            test_utils.keypoints_with_dynamic_shape(10, 16, 4),
        fields.InputDataFields.groundtruth_keypoint_visibilities:
            visibilities
    }
    padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
        tensor_dict=input_tensor_dict,
        max_num_boxes=3,
        num_classes=3,
        spatial_image_shape=[5, 6])

    self.assertAllEqual(
        padded_tensor_dict[fields.InputDataFields.groundtruth_keypoints]
        .shape.as_list(), [3, 16, 4])
    self.assertAllEqual(
        padded_tensor_dict[
            fields.InputDataFields.groundtruth_keypoint_visibilities]
        .shape.as_list(), [3, 16])

  def test_context_features(self):
    context_memory_size = 8
    context_feature_length = 10
    max_num_context_features = 20
    def graph_fn():
      input_tensor_dict = {
          fields.InputDataFields.context_features:
              tf.ones([context_memory_size, context_feature_length]),
          fields.InputDataFields.context_feature_length:
              tf.constant(context_feature_length)
      }
      padded_tensor_dict = inputs.pad_input_data_to_static_shapes(
          tensor_dict=input_tensor_dict,
          max_num_boxes=3,
          num_classes=3,
          spatial_image_shape=[5, 6],
          max_num_context_features=max_num_context_features,
          context_feature_length=context_feature_length)

      self.assertAllEqual(
          padded_tensor_dict[
              fields.InputDataFields.context_features].shape.as_list(),
          [max_num_context_features, context_feature_length])
      return padded_tensor_dict[fields.InputDataFields.valid_context_size]

    valid_context_size = self.execute_cpu(graph_fn, [])
    self.assertEqual(valid_context_size, context_memory_size)


class NegativeSizeTest(test_case.TestCase):
  """Test for inputs and related funcitons."""

  def test_negative_size_error(self):
    """Test that error is raised for negative size boxes."""

    def graph_fn():
      tensors = {
          fields.InputDataFields.image: tf.zeros((128, 128, 3)),
          fields.InputDataFields.groundtruth_classes:
              tf.constant([1, 1], tf.int32),
          fields.InputDataFields.groundtruth_boxes:
              tf.constant([[0.5, 0.5, 0.4, 0.5]], tf.float32)
      }
      tensors = inputs.transform_input_data(
          tensors, _fake_model_preprocessor_fn, _fake_image_resizer_fn,
          num_classes=10)
      return tensors[fields.InputDataFields.groundtruth_boxes]
    with self.assertRaises(tf.errors.InvalidArgumentError):
      self.execute_cpu(graph_fn, [])

  def test_negative_size_no_assert(self):
    """Test that negative size boxes are filtered out without assert.

    This test simulates the behaviour when we run on TPU and Assert ops are
    not supported.
    """

    tensors = {
        fields.InputDataFields.image: tf.zeros((128, 128, 3)),
        fields.InputDataFields.groundtruth_classes:
            tf.constant([1, 1], tf.int32),
        fields.InputDataFields.groundtruth_boxes:
            tf.constant([[0.5, 0.5, 0.4, 0.5], [0.5, 0.5, 0.6, 0.6]],
                        tf.float32)
    }

    with mock.patch.object(tf, 'Assert') as tf_assert:
      tf_assert.return_value = tf.no_op()
      tensors = inputs.transform_input_data(
          tensors, _fake_model_preprocessor_fn, _fake_image_resizer_fn,
          num_classes=10)

      self.assertAllClose(tensors[fields.InputDataFields.groundtruth_boxes],
                          [[0.5, 0.5, 0.6, 0.6]])


if __name__ == '__main__':
  tf.test.main()