From: "Steve Simon" <steve@quintile.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] PNG and APE (cntd)
Date: Thu, 27 Apr 2006 20:58:44 +0100 [thread overview]
Message-ID: <b913ca070e5ced74d5adb1347fdfa97a@quintile.net> (raw)
In-Reply-To: <6e35c0620604271226o17e6cccdm63a0794e550a39b4@mail.gmail.com>
Re: 12 bit images
The problem is that Real Life™ has a contrast ratio well in excess 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 latter
wins every time.
my 2¢
-Steve
next prev parent reply other threads:[~2006-04-27 19:58 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-27 4:47 lucio
2006-04-27 6:23 ` Lluís Batlle i Rossell
2006-04-27 17:51 ` lucio
2006-04-27 18:24 ` Lluís Batlle i Rossell
2006-04-27 18:28 ` Charles Forsyth
2006-04-27 19:26 ` Jack Johnson
2006-04-27 19:58 ` Steve Simon [this message]
2006-04-27 21:13 ` Lluís Batlle i Rossell
2006-04-27 22:05 ` Charles Forsyth
2006-04-28 5:00 ` lucio
2006-04-28 18:31 ` jmk
2006-04-27 20:02 ` Bruce Ellis
2006-04-27 19:59 ` lucio
2006-04-27 6:36 ` andrey mirtchovski
2006-04-27 6:39 ` andrey mirtchovski
2006-04-27 11:43 ` Lluís Batlle
2006-04-27 11:53 ` Harri Haataja
2006-04-27 12:25 ` Russ Cox
2006-04-27 12:25 ` Russ Cox
2006-04-27 18:18 ` lucio
2006-04-27 18:27 ` andrey mirtchovski
2006-04-27 19:56 ` lucio
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