GreyScale
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Raffriff42 (Talk | contribs) m (Rec601 vs PC.601) |
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:{{Par2|matrix|string|"Rec601"}} | :{{Par2|matrix|string|"Rec601"}} | ||
::Controls the colour coefficients used in RGB→greyscale conversion. | ::Controls the colour coefficients used in RGB→greyscale conversion. | ||
| − | ::*"Rec601" : Use Rec.601 coefficients ( | + | ::*"Rec601" : Use Rec.601 coefficients (and keeping luma range unchanged) |
| − | ::*"Rec709" : Use Rec.709 coefficients ( | + | ::*"Rec709" : Use Rec.709 coefficients (and keeping luma range unchanged) |
::*"AVERAGE" : Use averaged coefficients (''Y'' = (R + G + B) / 3) | ::*"AVERAGE" : Use averaged coefficients (''Y'' = (R + G + B) / 3) | ||
Revision as of 23:47, 17 January 2016
Converts the input clip to greyscale (no color), without changing the color format.
Greyscale(clip clip [, string matrix])
- string matrix = "Rec601"
- Controls the colour coefficients used in RGB→greyscale conversion.
- "Rec601" : Use Rec.601 coefficients (and keeping luma range unchanged)
- "Rec709" : Use Rec.709 coefficients (and keeping luma range unchanged)
- "AVERAGE" : Use averaged coefficients (Y = (R + G + B) / 3)
- Controls the colour coefficients used in RGB→greyscale conversion.
If clip is YUV, the chroma channels are simply set to grey (128) – matrix is not used and must be empty.
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 (0-255 in → 0-255 out; 16-235 in → 16-235 out)
