vapoursynth-decross 3

Spatio-temporal cross color (rainbow) reduction filter for VapourSynth.

Description

DeCross is a spatio-temporal cross color (rainbow) reduction filter.

DeCross must be used right after the source filter, before any field matching or deinterlacing.

The luma is returned unchanged.

This is a port of the DeCross Avisynth plugin, which is in turn based on the AviUtl plugin CrossColor.

Usage

decross.DeCross(clip clip, [int thresholdy=30, int noise=60, int margin=1, bint debug=False])

Parameters:

clip

A clip to process. It must have constant format and dimensions and it must be 8..16 bit integer YUV with 4:2:0 or 4:2:2 subsampling.

thresholdy

Edge detection threshold. Must be between 0 and the maximum sample value of the clip, so 0 and 255 at 8 bit and 0 and 65535 at 16 bit.

The value is compared against raw sample values and is not scaled by the bit depth, so it has to be adjusted when moving a script to a deeper clip.

Smaller values will detect and filter more edges.

Default: 30.

noise

Luma difference threshold. Must be between 0 and the maximum sample value of the clip, and like thresholdy it is compared against raw sample values and is not scaled by the bit depth.

Smaller values will filter more conservatively.

Default: 60.

margin

Expands the edge mask to the left and right by margin pixels. Must be between 0 and 4.

Default: 1.

debug

Instead of filtering the rainbows, show the areas that would be filtered.

Default: False.

Compilation

mkdir build && cd build
meson ../
ninja

License

GNU GPL v2 or later, like the Avisynth plugin.