Re: Low versus medium priced scanners

Peter Kirchgessner (peter@kirchgessner.net)
Mon, 10 May 1999 21:25:30 +0200

Rick Macdonald wrote:
>
> It's seems that I'm currently best off getting a SCSI based scanner, but I
> have a genereal question first.
>
> When comparing a cheap scanner (under $100) such as the Plustek 96xx
> series with a medium price scanner such as the so-called business-class HP
> 5200c, I can't tell what claims are due to the scanner hardware itself, or
> simply the bundled software. Obviously, the bundled software does a Linux
> user little good.
>
> The HP has color correction, snap-to colors for areas of what should be
> solid color, recognizes black and white line art and vectorizes it for
> smooth scaling, etc. This _sounds_ all like software features to me, but
> their wording in the specs implies that it's hardware, and I'm wondering
> if the hardware itself is really much different beyond the optical DPI
> resolution.
>
> ...RickM...
>
> --
> Source code, list archive, and docs: http://www.mostang.com/sane/
> To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com

Hi Rick,

I think the only feature that can be done by hardware/firmware of the
scanner is color correction. But there is little support in the
hp-backend of SANE. Concerning color you can only select NTSC or RGB
colors and you can do some brightness/contrast/gamma corrections.
Snap-to-colors or vetorization of lineart is neither supported by the
firmware nor by the backend.

--Peter

-- 
Peter Kirchgessner
WWW:    http://www.kirchgessner.net
e-mail: peter@kirchgessner.net





--
Source code, list archive, and docs: http://www.mostang.com/sane/
To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com