(No version information available, might only be in SVN)
Imagick::remapImage — Remaps image colors
   Replaces colors an image with those defined by replacement. The colors
   are replaced with the closest possible color. This method is available if Imagick has been compiled against ImageMagick version 6.4.5 or newer.
  
replacement
     An Imagick object containing the replacement colors
DITHER
     Refer to this list of dither method constants
   Returns TRUE on success.
  
Throws ImagickException on error.