Image Translation Demo

This demo application demonstrates an example of using neural networks to synthesize a photo-realistic image based on an exemplar image.

How It Works

On startup the demo application reads command line parameters and loads a network to the Inference Engine plugin. To get the result, the demo performs the following steps:

  1. Reading input data (semantic segmentation mask of image for translation, exemplar image and mask of exemplar image).
  2. Preprocessing for input image and masks.
  3. Network inference (segmentation network (optional) + translation network).
  4. Save results to folder.

Preparing to Run

For demo input image or video files, refer to the section Media Files Available for Demos in the Open Model Zoo Demos Overview. The list of models supported by the demo is in <omz_dir>/demos/image_translation_demo/python/models.lst file. This file can be used as a parameter for Model Downloader and Converter to download and, if necessary, convert models to OpenVINO Inference Engine format (*.xml + *.bin).

An example of using the Model Downloader:

python3 <omz_dir>/tools/downloader/downloader.py --list models.lst

An example of using the Model Converter:

python3 <omz_dir>/tools/downloader/converter.py --list models.lst

Supported Models

  • cocosnet
  • hrnet-v2-c1-segmentation

NOTE: Refer to the tables Intel's Pre-Trained Models Device Support and Public Pre-Trained Models Device Support for the details on models inference support at different devices.

Running

Running the application with the -h option yields the following usage message:

usage: image_translation_demo.py [-h] -m_trn TRANSLATION_MODEL
[-m_seg SEGMENTATION_MODEL] [-ii INPUT_IMAGES]
[-is INPUT_SEMANTICS] -ri REFERENCE_IMAGES
[-rs REFERENCE_SEMANTICS] -o OUTPUT_DIR
[-d DEVICE]
Options:
-h, --help Show this help message and exit.
-m_trn TRANSLATION_MODEL, --translation_model TRANSLATION_MODEL
Required. Path to an .xml file with a trained
translation model
-m_seg SEGMENTATION_MODEL, --segmentation_model SEGMENTATION_MODEL
Optional. Path to an .xml file with a trained
semantic segmentation model
-ii INPUT_IMAGES, --input_images INPUT_IMAGES
Optional. Path to a folder with input images or path
to a input image
-is INPUT_SEMANTICS, --input_semantics INPUT_SEMANTICS
Optional. Path to a folder with semantic images or
path to a semantic image
-ri REFERENCE_IMAGES, --reference_images REFERENCE_IMAGES
Required. Path to a folder with reference images or
path to a reference image
-rs REFERENCE_SEMANTICS, --reference_semantics REFERENCE_SEMANTICS
Optional. Path to a folder with reference semantics
or path to a reference semantic
-o OUTPUT_DIR, --output_dir OUTPUT_DIR
Required. Path to a folder where output files will be
saved
-d DEVICE, --device DEVICE
Optional. Specify the target device to infer on; CPU,
GPU, HDDL or MYRIAD is acceptable. Default
value is CPU

Running the application with the empty list of options yields the usage message given above and an error message.

There are two ways to use this demo:

  1. Run with segmentation model in addition to translation model. You should use only models trained on ADE20k dataset. Example: hrnet-v2-c1-segmentation. In this case only input and reference images are required without any masks. Segmentation masks will be generated via segmentation model.

    You can use the following command to run demo on CPU using cocosnet and hrnet-v2-c1-segmentation models:

python3 image_translation_demo.py \
-d CPU \
-m_trn <path_to_translation_model>/cocosnet.xml \
-m_seg <path_to_segmentation_model>/hrnet-v2-c1-segmentation.xml \
-ii <path_to_input_image>/input_image.jpg \
-ri <path_to_exemplar_image>/reference_image.jpg \
-o <output_dir>
  1. Run with only translation model. You can use the following command to run demo on CPU using cocosnet as translation model:
python3 image_translation_demo.py \
-d CPU \
-m_trn <path_to_translation_model>/cocosnet.xml \
-is <path_to_semantic_mask_of_image>/input_mask.png \
-ri <path_to_exemplar_image>/reference_image.jpg \
-rs <path_to_exemplar_semantic>/reference_mask.png \
-o <output_dir>

NOTE: For segmentation masks you should use mask (with shape: [height x width]) that specifies class for each pixel. Number of classes is 151 (from ADE20k), where '0' - background class.

Demo Output

The results of the demo processing are saved to a folder that is specified by the parameter output_dir.

See Also