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diff --git a/man/blind-chroma-key.1 b/man/blind-chroma-key.1 new file mode 100644 index 0000000..f185226 --- /dev/null +++ b/man/blind-chroma-key.1 @@ -0,0 +1,39 @@ +.TH BLIND-CHROMA-KEY 1 blind +.SH NAME +blind-chroma-key - Replace a colour range with transparency +.SH SYNOPSIS +.B blind-chroma-key +.I key-stream +.SH DESCRIPTION +.B blind-chroma-key +reads a video from stdin and colours from +.IR key-stream . +Each frame in +.I key-stream +should contain exactly two pixels. The colour of +the first pixel, and all colours with a distance +from that colour upto the same distance the colour +of the second pixel has to that colour, will be +turned into transparency in the video from stdin, +and the resulting video will be printed to stdout. +.P +If the two colours in a frame from +.I key-stream +have the same alpha value, all matching colours +will be turned into full transparency. Otherwise, +the colours matching the first colour will be +given the transparency specified with the first +colour, all other matching colours will have +a transparency between to two specified alpha +values. However, if alpha value of the second +colour is less than the alpha value of the first +colour, twos alpha values are inverted. +.SH SEE ALSO +.BR blind (7), +.BR blind-from-text (1), +.BR blind-colour-ciexyz (1), +.BR blind-colour-srgb (1), +.BR blind-dual-key (1) +.SH AUTHORS +Mattias Andrée +.RI < maandree@kth.se > |