1# Copyright 2016 The TensorFlow Authors. All Rights Reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14# ============================================================================== 15"""Tests for DecodePngOp.""" 16 17from tensorflow.python.framework import constant_op 18from tensorflow.python.framework import dtypes 19from tensorflow.python.ops import array_ops 20from tensorflow.python.ops import image_ops 21import tensorflow.python.ops.nn_grad # pylint: disable=unused-import 22from tensorflow.python.platform import test 23 24 25class DecodePngOpTest(test.TestCase): 26 27 def test16bit(self): 28 img_bytes = [[0, 255], [1024, 1024 + 255]] 29 # Encoded PNG bytes resulting from encoding the above img_bytes 30 # using go's image/png encoder. 31 encoded_bytes = [ 32 137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82, 0, 0, 0, 33 2, 0, 0, 0, 2, 16, 0, 0, 0, 0, 7, 77, 142, 187, 0, 0, 0, 21, 73, 68, 65, 34 84, 120, 156, 98, 98, 96, 96, 248, 207, 194, 2, 36, 1, 1, 0, 0, 255, 35 255, 6, 60, 1, 10, 68, 160, 26, 131, 0, 0, 0, 0, 73, 69, 78, 68, 174, 36 66, 96, 130 37 ] 38 39 byte_string = bytes(bytearray(encoded_bytes)) 40 img_in = constant_op.constant(byte_string, dtype=dtypes.string) 41 decode = array_ops.squeeze( 42 image_ops.decode_png( 43 img_in, dtype=dtypes.uint16)) 44 45 with self.cached_session(): 46 decoded = self.evaluate(decode) 47 self.assertAllEqual(decoded, img_bytes) 48 49 50if __name__ == "__main__": 51 test.main() 52