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Problems with generated transparencies

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Problems with generated transparencies Joerg Bergmann 20 Jan 08:51
Joerg Bergmann
2010-01-20 08:51:34 UTC (about 15 years ago)

Problems with generated transparencies

I use the actual Fedora 11 version of GIMP.

I have problems while generating partially transparency in images. I have an image containing white background and some light-blue, unsaturated details. I do the following steps: 1. Add transparency
2. color (white) to transparency
3. transparency threshold
1+2 seem to go OK, but step 3 makes the blue colors fully-saturated plus very dark. At the moment, I did this task using gifsicle, GIMP seems to be unusable for that. Any hints?

Joerg