How to make colors transparent?

To make one or several colors transparent use "ReplaceColor" option.

Example*:

ICPCL.exe –convertto gif –source " C:\Source Images\*.*" –dest "C:\out\" bpp:32 dither:no -oper ReplaceColor src_color:"r:255,g:0,b:0,a:0" dest_color:"r:255,g:255,b:255,a:255"

We made red areas transparent.

Example*:

ICPCL.exe –convertto gif –source " C:\Source Images\*.*" –dest "C:\out\" bpp:32 dither:no -oper ReplaceColor src_color:"r:255,g:0,b:0,a:0" dest_color:"r:255,g:255,b:255,a:255" ReplaceColor src_color:"r:0,g:0,b:255,a:0" dest_color:"r:255,g:255,b:255,a:255"

We made red and blue areas transparent.

* This example works the same way with TIFF and PNG formats.