Legacy ImageMagick Discussions Archive

Hi,

I seem to be finding the same greyscale image comes out more feint when processed with some computers.

I am resizing, applying a watermark and using autolevel to help pick out the detail.

The only thing i can immediately think of as differing is that the feint images seem to be by computers without graphics cards - is that likely to have an effect?

Thanks
Andy

Hi,

I've now found that if i use -colorspace RGB i do at least get the grey image the same strength

However, the watermark which i add using composite comes out darker.

Weird that it differs between computers

Andy

What is your exact command? Can you post links to your input images and to your old correct result?

Note you may need to add -set colorspace RGB rather than -colorspace RGB. If you post your command I can probably help. Note that IM grayscale images became linear after about IM 6.7.8.3. Thus I have been using -set colorspace RGB in various places to deal with the change to get back to processing the old way.

I generally put -set colorspace RGB before -colorspace gray and also right before -compose ... -composite.