[sane-devel] Backend for plustek Opticbook 3600
s0457957 at sms.ed.ac.uk
Sun Mar 21 19:01:39 UTC 2010
> for the image quality, I think you could concentrate on on full sensor
> resolution and 'half ccd' resolution.
I'm not sure what you mean but I guess full resolution is the maximum
hardware resolution of the scanner? If so then what is 'half ccd'
> In these modes AVEENB is of no influence
> since no averaging or deletion occurs. Then you can adjust the offset to be
> used for shading data. To find the correct offset some trial and error is
> needed. You'll have to change it's value until bright vertical lines match the
> closest dark vertical line in scans (you could scan only the white cover of
> the scanner, lines are more visible). You may try first the offset values from
> other GL841 scanners.
So I just do scans at full resolution of the white background and alter
the shading offset until it evens out? Should be no problem....
> Once done, you may choose to keep averaging, but in this case you'll have to
> tune compute_coefficients to do the same averaging than the planar method used
> for the CCD_CANONLIDE35.
Is this method you are talking about the large function added under
canonlide35 in the send_shading_coefficients? If so I will try if i get
time but as my hand in date is coming up I may not get time...
I should have the patch sent out to you by the end of the day, i'll
include pierre, you and the people who also have the scanner for a bit
Also does this mean I can add my name to the developer list at the top
of the genesys files :) ?
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