I take it you're scanning text for OCR? Consider it line art, and take some advice from Sean Michael Robinson in the Cerberus The Aardvark Restoration Project. http://momentofcerebus.blogspot.com/2017/02/paper-to-pixel-to-paper-again-part-five.html
In short: * Scan in 24-bit color. It doesn't slow it down. * Set the brightness/saturation/contrast/gamma to the defaults, and don't touch 'em. * Force the scanner to not auto-adjust. * Your PC is better at adjusting the color values and forcing it to greyscale than the scanner is. To which I add: * ImageMagick and some shell scripting can bulk-process anything. On Tue, Sep 8, 2020 at 10:32 AM Andrea Croci <[email protected]> wrote: > > Hi Alexander, > > thank you for your reply. That did work indeed: the scanner gets > recognised as 'airscan:e0:Canon MF745C/746C'. However the list of > options for that device is very short. For instance there is no > "brightness", which would be very helpful when scanning a page printed > on the backside too. That's what I always have to adjust with the Epson > scanner in order not to see the back printing through. > > In addition I just checked in my laptop, which has Ubuntu 20.04 > installed instead. That has recognised the scanner automatically with > the "escl" backend. I don't see an "escl.conf" in my desktop with 18.04. > Is this just a matter of sane-version? > > Is there any way to activate other functions for the scanner? > > Thank you and regards, > > Andrea > > On 08.09.20 12:30, Alexander Pevzner wrote: > > Hi Andrea, > > > > On 9/8/20 7:20 AM, Andrea Croci wrote: > >> I have just installed a new Canon iSensys MF746Cx on Ubuntu 18.04 and I > >> can't get it to scan. It' connected over the network. I haven't found > >> any driver or software for scanning on Canon's Website, so I was hoping > >> I could do it with sane. I have read on the list of supported devices > >> that the MF741/743 are fully supported by the pixma backend. > > > > The sane-airscan will probably work for you: > > > > https://github.com/alexpevzner/sane-airscan - the project page > > https://download.opensuse.org/repositories/home:/pzz/ - binary > > packages for many distros > > > -- Kelly "STrRedWolf" Price http://redwolf.ws
