Warning: RGB color data not yet supported in Painter's mode

Hi smart guys,

Have you got any new solutions to this 'Warning: RGB color data not yet supported in Painter's mode'?

I got some codes like:

backgroundImage = image([a b],[c d], ... imageFile, 'CDataMapping', 'scaled', 'HitTest', 'off'); colormap(gray); patchImage = patch(square(5:8,:),square(9:12,:),'r');

to plot a patch on a background image. When I try to save it to .pdf (using 'print' or 'export_fig'), it gives 'Warning: RGB color data not yet supported in Painter's mode'. Also the patch can not be displayed correctly on the background image.

Some solution using rgb2cm (from Matlab FX), but still not work well on my problem

Please tell me if you have a good idea. Thanks very much!

Aaronne.