On 21/09/2015 22:01, Alexander Hofmann wrote:
Hi,
I'm currently playing around with the genesys backend, trying to force
the scanner to over-/underexpose the image. The backend already has the
option to switch the lamp off; I'd like to use that feature to scan
arbitrary translucent/projected images - but I would have to control the
exposure time.
I'm a bit confused of the various calculation steps needed to calculate
the "exposure"; if I simple overwrite the exposure_time calculated
during scaning to a custom value, the head moves slowly but scans only a
small portion of the image.
I looked into the datasheet of the Genesys GL841 chip; I guess the "line
peroid" setting is the right thing to change, but it seems this is also
linked to the motor driving unit?
I realize this is probably a silly question and an absolutely
non-standard usecase, but maybe someone on the list can still help?
Anyway..
thanks in advance,
Alexander
Hello,
have you tried to tweak genesys frontend's analog gain ? Exposure
is also related to motor speed, and will be really complicated to set up.
Regards,
Stef
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