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# 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.
# ==============================================================================
"""Activation and weight binarizer implementations."""
import math
import numpy as np
import tensorflow as tf
def ConvertSignCodeToZeroOneCode(x):
"""Conversion from codes {-1, +1} to codes {0, 1}."""
return 0.5 * (x + 1.0)
def ConvertZeroOneCodeToSignCode(x):
"""Convert from codes {0, 1} to codes {-1, +1}."""
return 2.0 * x - 1.0
def CheckZeroOneCode(x):
return tf.reduce_all(tf.equal(x * (x - 1.0), 0))
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