[magick-users] From JPG to JPG - Different amount of colors

Benjamin Bartels b.bartels at portrix.net
Tue Mar 10 14:13:54 UTC 2009


Hi there,

I've got a big problem. I'm using convert to store a JPG as JPG and even 
if I do not use any parameters, the amount of colors, reported by 
Identify, varies.

Example:
A JPG picture, RGB Colorspace (with 8bit depth per channel), round about 
700.000 Colors. After using convert without any parameters, the amount 
of colors in the result file is about 1.500.000.

But what we want, even if JPG probably doesn't support that, is to keep 
the amount of colors and the colors itselfs as close to the original 
amount respectivly as true, as possible.

I'd be very lucky if anyone would have a suggestion for me/us.

Thanks a lot in advance an greetings from
B. Bartels

-- 
Benjamin Bartels
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Tel.: 040/398053-17
Fax: 040/398053-29
e-Mail: b.bartels at portrix.net

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