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<TITLE>sane-devel: Re: Patch for sane.tex (image polarity)</TITLE>
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<META NAME="Author" CONTENT="Oliver Rauch (oliver.rauch@Wolfsburg.DE)">
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<META NAME="Subject" CONTENT="Re: Patch for sane.tex (image polarity)">
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<H1>Re: Patch for sane.tex (image polarity)</H1>
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<!-- received="Tue Oct 3 05:45:52 2000" -->
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<!-- name="Oliver Rauch" -->
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<!-- subject="Re: Patch for sane.tex (image polarity)" -->
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<STRONG>From:</STRONG> Oliver Rauch (<A HREF="mailto:oliver.rauch@Wolfsburg.DE?Subject=Re:%20Patch%20for%20sane.tex%20(image%20polarity)&In-Reply-To=<39D9D5B8.95F8157C@wolfsburg.de>"><EM>oliver.rauch@Wolfsburg.DE</EM></A>)<BR>
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<STRONG>Date:</STRONG> Tue Oct 03 2000 - 05:48:56 PDT
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0026.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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<UL>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0024.html">Oliver Rauch: "Re: sane-umax-1.0.3-build-24 available"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0020.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0026.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0026.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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<P>
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Henning Meier-Geinitz wrote:
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<BR>
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<EM>>
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</EM><BR>
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<EM>> Hi,
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> On Tue, Oct 03, 2000 at 06:42:39AM +0100, Nick Lamb wrote:
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</EM><BR>
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<EM>> > In frames of type SANE_FRAME_GRAY, when the bit depth is 1 there are
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</EM><BR>
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<EM>> > only two sample values possible, 1 represents minimum intensity (black)
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</EM><BR>
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<EM>> > and 0 represents maximum intensity (white).
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</EM><BR>
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<EM>> > For all other bit depth and frame type combinations, a sample value of 0
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</EM><BR>
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<EM>> > represents minimum intensity and larger values represent increasing
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</EM><BR>
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<EM>> > intensity.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Yes, the "intensity" wording is better in my opinion.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> > Actually, can anyone tell me (from practical experience) whether I
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</EM><BR>
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<EM>> > am right that this only affects SANE_FRAME_GRAY? Do we have devices
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</EM><BR>
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<EM>> > that actually send 1bit RGB frames?
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> The Mustek backend had RGB lineart and halftone modes. I don't know any
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</EM><BR>
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<EM>> Mustek scanner that can do this and so I removed these modes. The old code
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</EM><BR>
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<EM>> looked like it would use 1 for max intensity and 0 for min intensity. Maybe
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</EM><BR>
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<EM>> David Mosberger-Tang can tell about the idea of these modes.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> Bye,
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</EM><BR>
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<EM>> Henning
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</EM><BR>
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<EM>>
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</EM><BR>
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<P>Hi Henning,
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<BR>
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<P>as far as I know there is no 1 bit color frame or image format defined.
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<BR>
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I can imagine how this would look like in 3 pass scanning mode,
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<BR>
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but there is (as far as I know) no interleaved RGB 1 bit format.
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<BR>
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<P>May be we should use the 8 bit format for it.
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<BR>
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<P>Bye
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<BR>
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Oliver
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<BR>
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<P><PRE>
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--
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Homepage: <A HREF="http://www.wolfsburg.de/~rauch">http://www.wolfsburg.de/~rauch</A>
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sane-umax: <A HREF="http://www.wolfsburg.de/~rauch/sane/sane-umax.html">http://www.wolfsburg.de/~rauch/sane/sane-umax.html</A>
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xsane: <A HREF="http://www.wolfsburg.de/~rauch/sane/sane-xsane.html">http://www.wolfsburg.de/~rauch/sane/sane-xsane.html</A>
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E-Mail: mailto:<A HREF="mailto:Oliver.Rauch@Wolfsburg.DE?Subject=Re:%20Patch%20for%20sane.tex%20(image%20polarity)&In-Reply-To=<39D9D5B8.95F8157C@wolfsburg.de>">Oliver.Rauch@Wolfsburg.DE</A>
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<P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Patch%20for%20sane.tex%20(image%20polarity)&In-Reply-To=<39D9D5B8.95F8157C@wolfsburg.de>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0026.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0020.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0026.html">Henning Meier-Geinitz: "Re: Patch for sane.tex (image polarity)"</A>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Tue Oct 03 2000 - 05:46:17 PDT</EM>
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