On Tue 01 Jan 2019 at 22:51:02 -0500, kamaraju kusumanchi wrote: > On Tue, Jan 1, 2019 at 3:04 PM Brian <a...@cityscape.co.uk> wrote: > > > > On Tue 01 Jan 2019 at 12:34:38 -0500, kamaraju kusumanchi wrote: > > > > > A scanned document from Canon pixma mx870 printer is significantly > > > larger compared to the same document scanned on a different scanner. > > > > Which is...? > > Do not have this information at the moment. Will provide it tomorrow. > > > > When I look at both the images side by side on a PC, there is no > > > visual difference between the two. I am trying to understand the > > > underlying cause and fix it if possible. > > > > You could mention which scanning software you used and what the > > setting for the output file format was. > > Both images are obtained from the scanners directly. I did not use any > specific software per se. The only setting I had to choose was the dpi > - which in both cases is set to 600.
Ah, I think I see now. You used a button on the device to initiate a scan. I was thinking in terms of something like xsane being used. > > > Questions: > > > 1) Does the large file size have anything to do with the printer > > > itself? Is there anything I can do (ex:- update the driver/firmware or > > > something)? > > > > Not at all; the printer has nothing to do with it. Printing is printing. > > Scanning is scanning. > > > > Understood. This is an 'all in one' printer which has both printing > and scanning capabilities. > > > > 2) Is the difference in image sizes due to the bpc (1 vs. 8) or > > > encoding (ccitt vs jped) fields? > > > > Could be. > > > > > 3) If yes, how to change them? > > > > One file is in (I think) tiff format. The other isn't. You didn't scan > > like and like from both devices. > > There are not that many options to choose from the scan settings. You > just choose the dpi and that is about it. > > I understand that we can't change much on what the scanner produces. > But there should be some software to further change the scanner's > output files? Jörg-Volker Peetz has indicated a technique; it can work. For a smaller file size you could also reduce the resolution from 600. -- Brian.
