Programming Web Graphics with Perl and GNU Softwar

Name

Map( ) — choose a set of colors from another image

Synopsis

$image->Map(image=>image-object,
               dither=>{1, 0})

Map( ) will change the colormap of the image to that of the image given as a parameter. This may be used to “synchronize” the colormaps of different images, or used with the special “Netscape” template format to convert an image’s colormap to the 216-color web safe palette:

$websafe = Image::Magick->new;
$status = $websafe->Read('NETSCAPE:');
$image->Map(image=>$websafe, dither=1);      # dither to 216-color cube