On 15/04/2023 22:24, Ralph Little wrote:
Hi,
On 2023-04-15 12:49, Steve Underwood wrote:
Hi,
I just found there is sane support for our old Canon LiDE70 scanner.
I can scan with this OK, but the colour balance, contrast, etc. looks
very strange. I noticed the man page says auto-calibration is not
supported. Are there any tools to sort out the image quality settings
easily? Perhaps by scanning a reference image?
Regards,
Steve
I don't believe so. Most scanners can perform auto calibration with
reference to hidden black and white strips inside the case.
For a lot of these scanners that use scanner-on-a-chip designs, that
process has to be performed by the driver code and I don't think that
has been written for this scanner as yet.
Cheers,
Ralph
I understand about the auto calibration. I was a contributor to SANE
about 20 years ago, implementing the backend for some Acer scanners. I
would try to help sort out this Canon driver, by tracing what the
Windows drivers do, but they stopped updating that driver at Windows 7.
I don't have anything old enough to run the old driver and monitor the
USB traffic.
Regards,
Steve
