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Visual Saliency Guided Foveated Video Compression

A novel video compression method which incorporates the non-uniform spatial resolution of the HVS to reduce perceptual redundancy. The proposed method has the following novel features:

  • A foveation process based on per-quad image warping is used to preserve image quality of salient regions, achieving non-uniform subsampling based on saliency level.
  • The saliency data is incorporated at a lower granularity, providing more precise quality control of salient regions.
  • Our method is independent of traditional encoding processes, making it applicable to improve most existing compression methods.

Algorithm Overview

Setup

  • Install GStreamer
  • Install GStreamer Plugins
  • Configure Gstreamer plugin lib path

See details here.

File Organization

.
├── python/
│   ├── warp.py (helper functions for image warping)
│   ├── gst_warp_transform.py (gst image warp plugin)
│   ├── reverse_warp.py (gst reverse image warp plugin)
│   ├── gst_saliency_info_meta.py (gst gaussian distribution parameter info plugin)
│   └── ... (other files for evaluation)
├── saliency_meta_c (c code for gaussian distribution parameter info plugin)
└── tsnnls (cython code for calling tsnnls in python)

tsnnls is a least square solver by J Cantarella.

Purge gstreamer plugin cache to reload the python plugin

rm -rf ~/.cache/gstreamer-1.0

Citation

@ARTICLE{10153607,
  author={Zhang, Shupei and Basu, Anup},
  journal={IEEE Access}, 
  title={Visual Saliency Guided Foveated Video Compression}, 
  year={2023},
  volume={11},
  number={},
  pages={62535-62548},
  keywords={Visualization;Video compression;Redundancy;Spatial resolution;Image quality;Image coding;Transforms;Foveation;perceptual redundancy;video compression;visual saliency},
  doi={10.1109/ACCESS.2023.3286577}}