GreyScale

From Avisynth wiki
Revision as of 18:10, 17 January 2016 by Raffriff42 (Talk | contribs)

Jump to: navigation, search

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 (actually "PC.601" since luma does not change)
  • "Rec709" : Use Rec.709 coefficients (actually "PC.709" since luma does not change)
  • "AVERAGE" : Use averaged coefficients (Y = (R + G + B) / 3)


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)

Retrieved from "http://avisynth.nl/index.php?title=GreyScale&oldid=8345"
Personal tools