Description

A color constancy filter that applies color correction based on the grayworld assumption.

For more info.

This is a port of the FFmpeg filter grayworld.

Requirements:

• AviSynth+ 3.6 or later and/or VapourSynth R55 or later

• Microsoft VisualC++ Redistributable Package 2022 (can be downloaded from here) (Windows only)

AviSynth+ usage:

grayworld (clip input, int "opt", int "cc")

VapourSynth usage:

grwrld.grayworld(clip input, int "opt", int "cc")

Parameters:

• input
  A clip to process.
  Must be in RGB(A) 32-bit planar format and in linear light.

• opt
  Sets which cpu optimizations to use.
  -1: Auto-detect.
  0: Use C++ code.
  1: Use SSE2 code.
  2: Use AVX2 code.
  3: Use AVX512 code.
  Default: -1.

• cc
  Color correction mode.
  0: Mean.
  1: Median. This mode is not affected by extreme values in luminance or chrominance.
  Default: 0.

Building:

• Windows
  Use solution files.

• Linux

  Requirements:
      - Git
      - C++17 compiler
      - CMake >= 3.16
  

  CMake options:

  -DBUILD_AVS_LIB=ON  # Build library for AviSynth+.
  -DBUILD_VS_LIB=ON   # Build library for VapourSynth.
  

  git clone https://github.com/Asd-g/AviSynthPlus-grayworld && \
  cd AviSynthPlus-grayworld && \
  mkdir build && \
  cd build && \
  
  cmake ..
  make -j$(nproc)
  sudo make install