Solarize_ops for Tensorflow Addons #1340
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| """ This module is used to invert all pixel values above a threshold | ||
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| which simply means segmentation. """ | ||
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| import tensorflow as tf | ||
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| def solarize(image, threshold=128): | ||
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| """Method to solarize the image | ||
| image: input image | ||
| threshold: threshold value to solarize the image | ||
| """ | ||
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| # For each pixel in the image, select the pixel | ||
| # if the value is less than the threshold. | ||
| # Otherwise, subtract 255 from the pixel. | ||
| return tf.where(image < threshold, image, 255 - image) | ||
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| def solarize_add(image, addition=0, threshold=128): | ||
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| """Method to add solarize to the image | ||
| image: input image | ||
| addition: addition amount to add in image | ||
| threshold: threshold value to solarize the image | ||
| """ | ||
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| # For each pixel in the image less than threshold | ||
| # we add 'addition' amount to it and then clip the | ||
| # pixel value to be between 0 and 255. The value | ||
| # of 'addition' is between -128 and 128. | ||
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| added_image = tf.cast(image, tf.int64) + addition | ||
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| added_image = tf.cast(tf.clip_by_value(added_image, 0, 255), tf.uint8) | ||
| return tf.where(image < threshold, added_image, image) | ||
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| """Test of solarize_ops""" | ||
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| import sys | ||
| import pytest | ||
| import tensorflow as tf | ||
| from tensorflow_addons.image import solarize_ops | ||
| from tensorflow_addons.utils import test_utils | ||
| from absl.testing import parameterized | ||
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| @test_utils.run_all_in_graph_and_eager_modes | ||
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| class SolarizeOPSTest(tf.test.TestCase, parameterized.TestCase): | ||
| """SolarizeOPSTest class to test the solarize images""" | ||
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| def test_solarize(self): | ||
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| if tf.executing_eagerly(): | ||
| image2 = tf.constant( | ||
| [ | ||
| [255, 255, 255, 255], | ||
| [255, 255, 255, 255], | ||
| [255, 255, 255, 255], | ||
| [255, 255, 255, 255], | ||
| ], | ||
| dtype=tf.uint8, | ||
| ) | ||
| threshold = 10 | ||
| solarize_img = solarize_ops.solarize(image2, threshold) | ||
| self.assertAllEqual(tf.shape(solarize_img), tf.shape(image2)) | ||
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| if __name__ == "__main__": | ||
| sys.exit(pytest.main([__file__])) | ||
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This is not how the
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