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Diffstat (limited to 'tensorflow/contrib/gan/python/eval/python/summaries_impl.py')
-rw-r--r-- | tensorflow/contrib/gan/python/eval/python/summaries_impl.py | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/tensorflow/contrib/gan/python/eval/python/summaries_impl.py b/tensorflow/contrib/gan/python/eval/python/summaries_impl.py index 508f487722..f9995bb19d 100644 --- a/tensorflow/contrib/gan/python/eval/python/summaries_impl.py +++ b/tensorflow/contrib/gan/python/eval/python/summaries_impl.py @@ -22,7 +22,9 @@ from tensorflow.contrib.gan.python import namedtuples from tensorflow.contrib.gan.python.eval.python import eval_utils from tensorflow.python.framework import ops from tensorflow.python.ops import array_ops +from tensorflow.python.ops import functional_ops from tensorflow.python.ops import math_ops +from tensorflow.python.ops import variable_scope from tensorflow.python.ops.losses import util as loss_util from tensorflow.python.summary import summary @@ -32,6 +34,7 @@ __all__ = [ 'add_gan_model_summaries', 'add_regularization_loss_summaries', 'add_cyclegan_image_summaries', + 'add_stargan_image_summaries' ] @@ -179,6 +182,94 @@ def add_image_comparison_summaries(gan_model, num_comparisons=2, max_outputs=1) +def add_stargan_image_summaries(stargan_model, + num_images=2, + display_diffs=False): + """Adds image summaries to see StarGAN image results. + + If display_diffs is True, each image result has `2` rows and `num_domains + 1` + columns. + The first row looks like: + [original_image, transformed_to_domain_0, transformed_to_domain_1, ...] + The second row looks like: + [no_modification_baseline, transformed_to_domain_0-original_image, ...] + If display_diffs is False, only the first row is shown. + + IMPORTANT: + Since the model originally does not transformed the image to every domains, + we will transform them on-the-fly within this function in parallel. + + Args: + stargan_model: A StarGANModel tuple. + num_images: The number of examples/images to be transformed and shown. + display_diffs: Also display the difference between generated and target. + + Raises: + ValueError: If input_data is not images. + ValueError: If input_data_domain_label is not rank 2. + ValueError: If dimension 2 of input_data_domain_label is not fully defined. + """ + + _assert_is_image(stargan_model.input_data) + stargan_model.input_data_domain_label.shape.assert_has_rank(2) + stargan_model.input_data_domain_label.shape[1:].assert_is_fully_defined() + + num_domains = stargan_model.input_data_domain_label.get_shape().as_list()[-1] + + def _build_image(image): + """Helper function to create a result for each image on the fly.""" + + # Expand the first dimension as batch_size = 1. + images = array_ops.expand_dims(image, axis=0) + + # Tile the image num_domains times, so we can get all transformed together. + images = array_ops.tile(images, [num_domains, 1, 1, 1]) + + # Create the targets to 0, 1, 2, ..., num_domains-1. + targets = array_ops.one_hot(list(range(num_domains)), num_domains) + + with variable_scope.variable_scope( + stargan_model.generator_scope, reuse=True): + + # Add the original image. + output_images_list = [image] + + # Generate the image and add to the list. + gen_images = stargan_model.generator_fn(images, targets) + gen_images_list = array_ops.split(gen_images, num_domains) + gen_images_list = [ + array_ops.squeeze(img, axis=0) for img in gen_images_list + ] + output_images_list.extend(gen_images_list) + + # Display diffs. + if display_diffs: + diff_images = gen_images - images + diff_images_list = array_ops.split(diff_images, num_domains) + diff_images_list = [ + array_ops.squeeze(img, axis=0) for img in diff_images_list + ] + output_images_list.append(array_ops.zeros_like(image)) + output_images_list.extend(diff_images_list) + + # Create the final image. + final_image = eval_utils.image_reshaper( + output_images_list, num_cols=num_domains + 1) + + # Reduce the first rank. + return array_ops.squeeze(final_image, axis=0) + + summary.image( + 'stargan_image_generation', + functional_ops.map_fn( + _build_image, + stargan_model.input_data[:num_images], + parallel_iterations=num_images, + back_prop=False, + swap_memory=True), + max_outputs=num_images) + + def add_gan_model_summaries(gan_model): """Adds typical GANModel summaries. |