[Magick-bugs] Quantizing an image with alpha introduces blackareas

Peter Pimley Peter.Pimley at zoemode.com
Fri Aug 3 09:15:30 PDT 2007


 

> I ran this command on my ISP's shell machine and was unable 
> to reproduce the problem.
> 
> Shell:
> Linux xmission 2.6.19.2-grsec #1 SMP Sat May 12 15:40:51 MDT 
> 2007 i686 GNU/Linux
> 
> Convert:
> Version: ImageMagick 6.2.4 02/10/07 Q16 http://www.imagemagick.org
> Copyright: Copyright (C) 1999-2005 ImageMagick Studio LLC



Me too.  Yes, I should have mentioned that in my original post.  I tried
on 6.2.4 (on Debian Etch on a noname PC) and you get no black bar.  You
get no alpha channel either, unless I typed it in wrong.

I'll also check with whatever version's on my home Debian Lenny machine
over the weekend.

What I get on my WinXP machine is opaque blue at the top, fading to
black and transparent as you go down.  A third of the way down is some
only-a-little-bit-transparent black.

Peter




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