man.postnix Miscellaneous man pages of Plan 9 related material

     REMAP(9.1)                                             REMAP(9.1)

     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.

     Page 1                       Plan 9            (printed 12/21/24)