Watermarking problem

[life24]

Hello,
How can watermark a color image inside a gray scale image?
Thanks

[fmw42]

see http://www.imagemagick.org/Usage/compose/#dissolve

It does not matter if one image is gray and the other is color (either way)

Code: Select all

convert grayimage colorimage -compose dissolve \ 
-define compose:args={src_percent},{dst_percent} \ 
-composite result

[life24]

Thank you,but i think after your solution,grayscale image will be colorful.

[fmw42]

If you put a color watermark on a grayscale image, the result must be sRGB and not grayscale, since there is some color in the picture. You cannot keep the result as grayscale.

If you want a grayscale result, either add -colorspace gray at the end before the output or use a grayscale version of the watermark image