NAME

cmap, remap - map colors

SYNOPSIS

fb/cmap colormap [ input ]

fb/remap colormap [ input ]

DESCRIPTION

Cmap looks up the rgb channels of the input picture file (default standard input), in the colormap, writing the resulting rgb image to standard output. That is, cmap writes on its output the result of applying the colormap to the pixels of the input image.

Remap is approximately the inverse of cmap. Pixel values in the input image are replaced by those that, when mapped through the input colormap, come closest to reproducing the input image. The output picture includes a copy of the colormap.

SOURCE

/sys/src/fb/cmap.c
/sys/src/fb/remap.c

SEE ALSO

picfile(9.6)

BUGS

Both commands work only if the input image contains rgb channels.