Flood fill for multiple files

I have several hundred bitmap files for which I'd like to do a flood fill to change one of the colors. Are there any programs out there that will allow me to do this, or which will allow me to write a script to do this sort of processing?

Thanks,开发者_Go百科 Kevin

take a look at graphicsmagick http://www.graphicsmagick.org/

and use something like this

 for %%f in (*.bmp) do (
   gm convert -draw "fill yellow ; color 0,0 floodfill" %%f %%~nf.new.bmp
 )