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, [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] (1), [BM3D] (3)
+---------------------+--+                           +--+
|   entropy codecs    |-c| TIFF*, PNG, Huffman, PNM, [adaptive_Huffman] (4), [arith] (4), [adaptive_arith] (5).
+---------------------+--+

...* = default option
[...] = to be implemented
(.) = points for the evaluation of the subject