[sane-devel] HP5470c scanner nearly working!

Martijn van Oosterhout kleptog at svana.org
Fri Feb 21 01:32:09 GMT 2003


On Thu, Feb 20, 2003 at 09:19:26PM +0100, Bertrik Sikken wrote:
> In the hp3300, the calibration table uses a 16-bit word for each
> calibration value, lower 6 bits are offset and upper 10 bits gain.

Actually, I just remembered. Here is a huge difference. The calibration info
on the hp5470 amounts to 12 bytes per pixel. Three small 16 bit integers
(around 0x05e0) and three large 16 integers (around 0xa000). That why I
think that they're max and min values. At the moment they're hardcoded
because without anything it just produces nothing useful.

I'll look into all this tonight.
-- 
Martijn van Oosterhout   <kleptog at svana.org>   http://svana.org/kleptog/
> Support bacteria! They're the only culture some people have.
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