plustek: gamma correction
Subject:
Re: gamma correction
From:
Gerhard Jaeger ####@####.####
Date:
7 Feb 2003 07:39:40 -0000
Message-Id: <200302070829.52907.gerhard@gjaeger.de>
Hi,
I'm not sure if it's possible to find out who does the gamma correction.
I assume, that most of the scanners have enough memory to set
at least a corresponding look-up-table....
Anyway, I think there's no slowdaown in scanning speed if it's
done within the backend or the scanner or at least xsane, as the
look-up operations are fast...
look-up means use the pixel value as index within the table and the
result is the new pixel value.
xsane gamma correction can be switched off or at least setting the
correction to 1.0 means a 1by1 conversion...
Cheers
Gerhard
On Mittwoch, 5. Februar 2003 12:48, Lars Täuber wrote:
> Hi,
>
> where can i find out, which scanner are able to do a gamma correction
> while scanning? My xsane says that the gamma correction is made by
> software(xsane) while scanning with my epson 2400. Are there scanners
> that can do it in hardware (i.e. scanning slower or faster)?
