sane-project-website/old-archive/1999-04/0117.html

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<title>sane-devel: Re: 16 bit per sample support</title>
<h1>Re: 16 bit per sample support</h1>
<b>Nick Lamb</b> (<a href="mailto:njl98r@ecs.soton.ac.uk"><i>njl98r@ecs.soton.ac.uk</i></a>)<br>
<i>Tue, 6 Apr 1999 22:02:02 +0100 (BST)</i>
<p>
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On Tue, 6 Apr 1999, I wrote:<br>
<p>
<i>&gt; The SANE standard doesn't "imply" anything from depth, it reflects the</i><br>
<i>&gt; natural colour depth of the image data only. Most backends choose to use</i><br>
<i>&gt; a transmission format (controlled as explained by Ewald below) which</i><br>
<i>&gt; best matches their native colour depth. This is hardly surprising.</i><br>
<p>
Well, I should read the documentation more clearly before making statements<br>
like this. There is a case where the depth does "sort of" imply a data<br>
transmission format from a depth value. In the case where the depth == 1<br>
with value data (ie Lineart scans) SANE declares that this should be a<br>
packed data format with 8 pixels per byte. This exception makes a lot of<br>
sense (it seems to be the natural trasmission format for Lineart scans)<br>
but it *is* an exception. So the general rule still stands.<br>
<p>
Nick.<br>
<p>
<p>
<pre>
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