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# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve. | |
# | |
# 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. | |
import math | |
import cv2 | |
import numpy as np | |
import random | |
from PIL import Image | |
from .rec_img_aug import resize_norm_img | |
class SSLRotateResize(object): | |
def __init__(self, | |
image_shape, | |
padding=False, | |
select_all=True, | |
mode="train", | |
**kwargs): | |
self.image_shape = image_shape | |
self.padding = padding | |
self.select_all = select_all | |
self.mode = mode | |
def __call__(self, data): | |
img = data["image"] | |
data["image_r90"] = cv2.rotate(img, cv2.ROTATE_90_CLOCKWISE) | |
data["image_r180"] = cv2.rotate(data["image_r90"], | |
cv2.ROTATE_90_CLOCKWISE) | |
data["image_r270"] = cv2.rotate(data["image_r180"], | |
cv2.ROTATE_90_CLOCKWISE) | |
images = [] | |
for key in ["image", "image_r90", "image_r180", "image_r270"]: | |
images.append( | |
resize_norm_img( | |
data.pop(key), | |
image_shape=self.image_shape, | |
padding=self.padding)[0]) | |
data["image"] = np.stack(images, axis=0) | |
data["label"] = np.array(list(range(4))) | |
if not self.select_all: | |
data["image"] = data["image"][0::2] # just choose 0 and 180 | |
data["label"] = data["label"][0:2] # label needs to be continuous | |
if self.mode == "test": | |
data["image"] = data["image"][0] | |
data["label"] = data["label"][0] | |
return data | |