Henning Meier-Geinitz wrote:
>
> Hi,
>
> On Tue, Oct 03, 2000 at 06:42:39AM +0100, Nick Lamb wrote:
> > In frames of type SANE_FRAME_GRAY, when the bit depth is 1 there are
> > only two sample values possible, 1 represents minimum intensity (black)
> > and 0 represents maximum intensity (white).
> > For all other bit depth and frame type combinations, a sample value of 0
> > represents minimum intensity and larger values represent increasing
> > intensity.
>
> Yes, the "intensity" wording is better in my opinion.
>
> > Actually, can anyone tell me (from practical experience) whether I
> > am right that this only affects SANE_FRAME_GRAY? Do we have devices
> > that actually send 1bit RGB frames?
>
> The Mustek backend had RGB lineart and halftone modes. I don't know any
> Mustek scanner that can do this and so I removed these modes. The old code
> looked like it would use 1 for max intensity and 0 for min intensity. Maybe
> David Mosberger-Tang can tell about the idea of these modes.
>
> Bye,
> Henning
>
Hi Henning,
as far as I know there is no 1 bit color frame or image format defined.
I can imagine how this would look like in 3 pass scanning mode,
but there is (as far as I know) no interleaved RGB 1 bit format.
May be we should use the 8 bit format for it.
Bye
Oliver
-- Homepage: http://www.wolfsburg.de/~rauch sane-umax: http://www.wolfsburg.de/~rauch/sane/sane-umax.html xsane: http://www.wolfsburg.de/~rauch/sane/sane-xsane.html E-Mail: mailto:Oliver.Rauch@Wolfsburg.DE-- Source code, list archive, and docs: http://www.mostang.com/sane/ To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
This archive was generated by hypermail 2b29 : Tue Oct 03 2000 - 05:46:17 PDT