No, the Epson software sends commands to the scanner to tell it which 8 bits
you want returned, on the basis of the settings you select in the software.
It is not the only scanner that works this way (some first generation film
scanners did too). Photoshop can use the bits, yes, but Photoshop users are
probably a tiny minority of Epson Perfection 1200 users. Vuescan, for all
Ed's good work, also doesn't have many Perfection 1200 users, and didn't
support any similar scanners at all at the time the Perfection was designed.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Richard Wolfson
Sent: 26 October 2000 00:14
To: [EMAIL PROTECTED]
Cc: EdHamrick@aol. com
Subject: RE: VueScan & Epson 1200S success & question.
VueScan and Photoshop can use the extra bits.
You think Epson's TWAIN driver gets 12 bits from the USB but VueScan
can't? That seems unlikely to me. But maybe there's something wrong with
the way I'm using VueScan, or maybe VueScan doesn't yet capture 12 bits
from USB devices.
Or maybe the Epson 1200 scanner simply does not deliver 8 bits to ANY
software. If that's confirmed, I have a clear gripe with Epson.
I hope Ed Hamrick can tell us, when he gets back from vacation. Ed?
Richard Wolfson
[EMAIL PROTECTED]
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Mike Finley
> Sent: Wednesday, October 25, 2000 4:43 PM
> To: [EMAIL PROTECTED]
> Subject: RE: VueScan & Epson 1200S success & question.
>
>
> I'd say deceptive rather than dishonest, and not really that
> deceptive - you
> do get the advantage of a twelve bit scan for the supplied
> application,
> which allows you to choose which eight bits you pass to the
> application.
> Most graphics applications can't use the 12 bits anyway, and
> certainly not
> those you'd expect a user of a consumer scanner costing £200
> or so to use.
>
> The way I phrased the response in one thread was misleading -
> it is a 12 bit
> scanner, it just doesn't make all 12 bits available externally.
>
> mike
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Richard Wolfson
> Sent: 25 October 2000 19:06
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: RE: VueScan & Epson 1200S success & question.
>
>
> Mike, I think you are right, and I have been had by Epson. They lie!
>
> I tried an experiment: I scanned a baseball (for smooth density
> gradient) at 300 ppi both ways on my 1200U: saved as 24 bit
> tiff and 48
> bit tiff. Then opened both in Photoshop, and did a levels adjustment,
> moving black up to 128 and white down to 196, to accentuate the
> difference between 8 bit and 12 bit data.
>
> The resulting images looked the same, and so did their histograms.
> Looking at the green, for instance, I see nice rows of spikes with big
> spaces between -- both the same.
>
> Since I bought this scanner in part for the 12 bit data Epson
> promised,
> I may now return it and get a UMax. What a scam! Would you say Epson
> specs are dishonest, or merely deceptive?
>
> regards,
> Richard Wolfson
> rwolfson at LyricDesign.com
>
>
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