From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <b913ca070e5ced74d5adb1347fdfa97a@quintile.net>
From: "Steve Simon" <steve@quintile.net>
Date: Thu, 27 Apr 2006 20:58:44 +0100
To: 9fans@cse.psu.edu
Subject: Re: [9fans] PNG and APE (cntd)
In-Reply-To: <6e35c0620604271226o17e6cccdm63a0794e550a39b4@mail.gmail.com>
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Re: 12 bit images

The problem is that Real Life=E2=84=A2 has a contrast ratio well in exces=
s of
12bits (72dBs) and if you add any exposure error (human error or fooled
software) then you may find quite a bit of your exposure is crushed
or burnt out.

This is why people use 14bit scanners running at 4096dpi and the like,
only to downsample to 640x480x8bit. You will always get better results if
you throw away resolution cleanly using well designed digital filter
than to use a low-res scanner directly.

I have seen several comparisons of SD vs HD TV down-converted, and the la=
tter
wins every time.

my 2=C2=A2

-Steve