Re: [GD-DEVEL] Load Image Posterizing

[email protected] (Pierre Joye) Fri, 8 May 2009 22:01:59 +0200
Newsgroups php.gd.devel
Message-ID <[email protected]>
hi,

Your script did not make it. Can you attach it as .txt or post a link
to it please?

Cheers,

On Thu, May 7, 2009 at 9:23 AM, Alex Dodge <[email protected]> wrote:
> Hello.  I am using GD 2.0.34 with Perl and am running into a snag.
> Firstly, I hope this is the right forum for Perl questions.  I believe
> my problem is with GD not Perl, but if this isn't the right venue, I'd
> appreciate being redirected.
>
> I'm trying to load an image and access the pixel data.  However, I'm
> noticing that GD seems to be posterizing the image when I load it, so
> I'm not getting all the colors.  I suspect I'm doing something wrong.
>
> Attached is a perl script that shows the problem.  When I run it on,
> for example, this image:
> http://upload.wikimedia.org/wikipedia/commons/4/4a/Colorful_pottery.jpg
>
> I get this:
>
> $ ./imgavg.pl Colorful_pottery.jpg
> 202 colors.
>
> I'm fairly certain that that image has more than 202 colors, so I'm
> wondering where I'm going wrong.  Any help would be appreciated.
>
> Thank you very much.
>
> Alex Dodge
> http://alexdodge.net/
>
>
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-- 
Pierre

http://blog.thepimp.net | http://www.libgd.org