Visual Coding Framework

A programming environment to develop and test image and video compression algorithms.

Install and configuration

Supposing that a Python interpreter and Git are available:

  python -m venv ~/envs/VCF
  git clone git@github.com:Sistemas-Multimedia/VCF.git
  cd VCF
  source ~/envs/VCF/bin/activate
  pip install -r requirements

Usage

Image coding (example)

  cd src
  python PNG.py encode
  display /tmp/encoded.png
  python PNG.py decode
  display /tmp/decoded.png

Video coding (example)

  cd src
  python III.py encode
  ffplay /tmp/encoded_%04d.tif
  python III.py decode
  ffplay /tmp/decoded_%04d.png

Codecs organization

+---------------------+
| temporal transforms |    III [T,N], [IPP] (9), [IBP] (10), [MCTF] (10).
+---------------------+--+
| spatial transforms  |-T| 2D-DCT* [B,p,L,x], 2D-DWT [l,w], 2D-KLT [B,x], 2D-MDCT [B,x], [LBT] (10), no_spatial_transform.
+---------------------+--+
|  color transforms   |-t| YCoCg*, YCrCb, color-DCT, no_color_transform.
+---------------------+--+
|     quantizers      |-a| deadzone* [q], LloydMax [q,m,n], VQ [q,b], color-VQ [q].
+---------------------+--+
|  decoding filters   |-f| no_filter*, gaussian_blur [s], NLM [H,t,s], [BM3D] [s]
+---------------------+--+
|   entropy codecs    |-c| TIFF*, PNG, Huffman, PNM, CBAHC [o], CBAAC [o].
+---------------------+--+

...* = default option