Legacy ImageMagick Discussions Archive

Ok, it works if -clamp is made exactly before conversion to 8 bits and saving. If I make any other operation, even -auto-level, which presumably normalizes images from 0.0 to 1.0, after -clamp ... if won't work. Except if I don't use -modulate. Other operations alone and together like -linear-stretc...

I just tested with clamp. In fact with clamp before, after... in generous amounts... to no avail.

Have you tested with the PPM I've put in the first post?

Yes, I get the same error, with all 3 colorspaces...

You can test yourself with the input file I sent. Please tell me if you can't reproduce the result.

This is a problem with hdri-enabled ImageMagick only, just tested ImageMagick-6.6.0-9 with HDRI disabled and it works fine in all colorspaces!

Hello! I've found a bug in modulate that only occurs in HDRI enabled ImageMagick 6.6.0-9 apparently. convert_hdri input.ppm -modulate 100,150,100 -depth 8 -quality 98 -sampling-factor 1x1 output_hdri.jpg convert_normal input.ppm -modulate 100,150,100 -depth 8 -quality 98 -sampling-factor 1x1 output_...