From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <c64f0af16da74a404aea9557eb123c85@quintile.net>
From: "Steve Simon" <steve@quintile.net>
Date: Mon, 28 Aug 2006 23:17:33 +0100
To: 9fans@cse.psu.edu
Subject: Re: [9fans] shrinking an Image?
In-Reply-To: <d0a044e00bbf15ec356cf6c6329a77f1@proxima.alt.za>
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> I find that resample(1) is not visually as faithful as (even?)
> page(1)'s built-in resizer.  I have not explored the possible causes,
> however.  For JPEG and 2, 4, 8 times resizing (shrinking) I find the
> cjpeg | djpeg combination to be preferable.

Just a guess, but prehaps page does resample in screen space 
(e.g. 16bpp) whereas resample(1) probably runs faithfully in YUV
(well, more likely RGB) space. This could easily have the effect of
amplifying the JPEG compression artiacts. Resampling in the incorrect
gamma land can also have strange effects like this.

-Steve