add images with script

Author: rickwierenga

tensorflow_datasets/testing/imagewang.py

@@ -0,0 +1,81 @@
+# coding=utf-8
+# Copyright 2020 The TensorFlow Datasets Authors.
+#
+# 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.
+
+r"""Generate testing images for Imagewang. 
+
+Each image is a black 1 by 1 image.
+"""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+
+from absl import app
+from absl import flags
+import numpy as np
+import tensorflow as tf
+
+from tensorflow_datasets.core.utils import py_utils
+from tensorflow_datasets.testing import test_utils
+
+flags.DEFINE_string("tfds_dir", py_utils.tfds_dir(),
+                    "Path to tensorflow_datasets directory")
+FLAGS = flags.FLAGS
+
+_IMAGE_FILENAME = 'test_image'
+_LABEL_DIRNAME = 'label'
+
+_SIZES = ["full-size", "320px", "160px"]
+_SIZE_TO_DIRNAME = {
+    "full-size": "imagewang",
+    "320px": "imagewang-320",
+    "160px": "imagewang-160"
+}
+
+
+def examples_dir():
+  return os.path.join(FLAGS.tfds_dir, "testing", "test_data", "fake_examples")
+
+
+def imagewang_dir(size):
+  dir_name = _SIZE_TO_DIRNAME[size]
+  return os.path.join(examples_dir(), 'imagewang', dir_name)
+
+
+def imagewang_label_dir(size):
+  return os.path.join(imagewang_dir(size), _LABEL_DIRNAME)
+
+
+def make_image():
+  return np.random.randint(256, size=(1 * 1), dtype=np.uint8)
+
+
+def write_image_file(filename):
+  with tf.io.gfile.GFile(filename, "wb") as f:
+    f.write(b"1" * 16)  # header
+    f.write(make_image().tobytes())
+
+
+def main(_):
+  for size in _SIZES:
+    output_dir = imagewang_label_dir(size)
+    test_utils.remake_dir(output_dir)
+    write_image_file(os.path.join(output_dir, _IMAGE_FILENAME))
+
+
+if __name__ == "__main__":
+  app.run(main)