GreyScale: Difference between revisions
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Up-to-date documentation: [https://avisynthplus.readthedocs.io/en/latest/avisynthdoc/corefilters/greyscale.html https://avisynthplus.readthedocs.io] | |||
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Converts the input clip to greyscale (no color), without changing the [[Convert|color format]]. | Converts the input clip to greyscale (no color), without changing the [[Convert|color format]]. | ||
Revision as of 20:19, 16 September 2022
AviSynth+
Up-to-date documentation: https://avisynthplus.readthedocs.io
Converts the input clip to greyscale (no color), without changing the color format.
UK (Greyscale) and US (Grayscale) spellings are both allowed.
Greyscale(clip clip [, string matrix])
Grayscale(clip clip [, string matrix])
- string matrix = "Rec601"
- In RGB based formats, the conversion produces the luma using the coefficients given in the matrix parameter.
- "Rec601" : Use Rec.601 coefficients (and keeping luma range unchanged)
- "Rec709" : Use Rec.709 (HD) coefficients (and keeping luma range unchanged)
- "Rec2020" : Use Rec.2020 (UHD) coefficients (and keeping luma range unchanged) AVS+
- "AVERAGE" : Use averaged coefficients (Y = (R + G + B) / 3)
- In RGB based formats, the conversion produces the luma using the coefficients given in the matrix parameter.
If clip is YUV, the chroma channels are simply set to grey (128d) – matrix is not used and must not be specified otherwise an error will be thrown.
See Color conversions for an explanation of the coefficients. Broadly speaking though,
- using Rec709, green contributes more to the output, compared to the default Rec601;
- using Average, blue contributes more.
In all cases, Luma range is not changed (0d-255d in → 0d-255d out; 16d-235d in → 16d-235d out)
