On Wed, 15 Oct 1997 Oliver.Rauch@Wolfsburg.DE wrote:
[concerning UMAX Astra-1200 S]
> Pleas would someone try the gamma-coorection and the option
> 10-bit-mode and tell me if it works.
at second sight, I'm not so sure anymore, whether the gamma
correction works right:
When I turn the "custom gamma table" on without any other
changes, I get a solid gray scan. With all values set to 1 (which
I assume should produce about the same result as without the
gamma table) the picture is pretty dark, white is dark gray and
the colors don't look right. I can't find any settings, that
produce a normal looking result.
When I uncheck the gamma correction option, subsequent scans
yield very interesting solarisation-like effects - it is
necessary to turn the scanner off and on again to get things back
to normal.
As far as the 10-bit option is concerned, I am not so sure, what
exactly the effect of turning it on should be. It doesn't cause
any crashes anymore (these were obviously also only whith
gtk+970925) but the results look pretty weird. While the button
is checked, most scans are accompanied by message boxes popping
up saying either "Error during read: the Operation was cancelled"
or "cannot handle depth 16". When unchecked again, the very next
scan will produce another such message, then things are back to
normal again.
Bye,
Peter
-- Source code, list archive, and docs: http://www.mostang.com/sane/ To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com