sane-project-website/old-archive/1999-04/0110.html

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<title>sane-devel: Re: 16 bit per sample support</title>
<h1>Re: 16 bit per sample support</h1>
<b>Ewald R. de Wit</b> (<a href="mailto:ewald@pobox.com"><i>ewald@pobox.com</i></a>)<br>
<i>Tue, 6 Apr 1999 19:47:14 +0200</i>
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Oliver Rauch (<a href="mailto:oliver.rauch@Wolfsburg.DE">oliver.rauch@Wolfsburg.DE</a>) wrote:<br>
<i>&gt; If the image depth is greater than 8 bits per sample most of the scanners</i><br>
<i>&gt; (e.g all UMAX, as far as I know microtek too) do send the data padded to</i><br>
<i>&gt; the most significant bits.</i><br>
<p>
Just as a little scan trivia: the HP format is LSB-justified.<br>
 <br>
<i>&gt; The only problem I see is that the frontend does not now the real bit depth,</i><br>
<i>&gt; because</i><br>
<i>&gt; the backend says 16 bits in all this cases!</i><br>
<p>
Well then lets define 'depth' to be the native depth. If depth&gt;8 then<br>
the frontend should know that one sample is send MSB justified and stretched<br>
(the way Andy described) to 16 bits. How would that sound?<br>
 <br>
<i>&gt; &gt; Putting it in all the backends would mean more (duplicate) work.</i><br>
<i>&gt; </i><br>
<i>&gt; No, no duplicate work, because the backend or the frontend has to do this.</i><br>
<p>
There are more backends then frontends :-) But I agree that was a moot<br>
point.<br>
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-- 
  --  Ewald
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