<html><head></head><body>Hi Rainer,<br>The current version of scangearmp2 is 4.10 ( <a href="https://canoncanadafr.custhelp.com/app/answers/answer_view/a_id/1034243/~/scangear-mp-v.-4.10-for-linux-%28debian-packagearchive%29).">https://canoncanadafr.custhelp.com/app/answers/answer_view/a_id/1034243/~/scangear-mp-v.-4.10-for-linux-%28debian-packagearchive%29).</a><br>You can install libmfo2-canon (<a href="https://github.com/Ordissimo/libmfp2-canon),">https://github.com/Ordissimo/libmfp2-canon),</a> which will allow you to use your device with xsane.<br>I have not finished, the Flatbed, works, I plan to add the 600dpi.<br>For the ADF, only the first page is taken but I'll fix that after the vacations.<br><br>Thierry<br><br><div class="gmail_quote">Le 2 août 2021 11:27:38 GMT+02:00, Dr Rainer Woitok <rainer.woitok@gmail.com> a écrit :<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">Ralph and Others,<br><br>On Wednesday, 2021-06-30 12:07:49 +0200, I myself wrote:<br><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">Ralph,<br><br>On Wednesday, 2021-05-19 18:21:57 -0700, you wrote:<br><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;">...<br>On 2021-05-19 8:46 a.m., Dr Rainer Woitok wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #8ae234; padding-left: 1ex;"> ...<br> - The PNG file from the flatbed clearly showed the original paper hav-<br> ing been rather thin, since some colours from the reverse side shone<br> slightly through, and the background colour having been faintly grey<br> rather than white. In other words, this PNG file was a fairly good<br> copy of the original.<br><br> - But the PNG file from the ADF did show almost no shine through and a<br> more or less purely white background. Dark colours appeared slight-<br> ly darker and light colours slightly lighter than the original. The<br> effect was somewhat similar to using ImageMagick's "-normalize" opt-<br> ion.<br> ...<br></blockquote>Some of the pixma devices seems to have a completely different engine<br>for generating scans from the ADF compared to the flatbed.<br>For ADF, they return JPEG data to SANE instead of the normal raster data<br>that we get from flatbed.<br>I have no idea why that would be the case but they do use the same sensors.<br></blockquote><br>I have meanwhile opened a support case with Canon complaining about the<br>low quality of ADF scans. In their response Canon pointed out that ADF<br>(at least normally) is optimized for speed rather than quality and sugg-<br>ested testing with "IJ Scan Utility" using the various settings of the<br>"Advanced Mode" provided by "ScanGear". So I reanimated my old Windows<br>Vista laptop, installed "IJ Scan Utility" from the Canon CD and started<br>it.<br><br>I selected "Document (ADF Simplex)", "A4", and "Color" in the input and<br>"300 dpi" in the output section, and under "Image Settings" I left "Im-<br>age Adjustment" at "Document" and set "Unsharp Mask" and "Descreen" to<br>"OFF" and "Reduce Dust and Scratches" and "Grain Corretcion" to "None".<br>Hitting "Scan" I eventually obtained file "ScanGear-ADF-Doc.png".<br><br>In the second run I just changed "Image Adjustment" to "None" (the only<br>alternative offered) and scanned to file "ScanGear-ADF-None.png".<br><br>Finally, I changed the Source to "Platen" which forced "Paper Size" to<br>"Full Platen" and "Image Adjustment" to "None" (greying both out), and<br>received file "ScanGear-Flatbed.png".<br><br>Here are the file sizes:<br><br> $ ls -l ScanGear-*<br> -rwx------ 1 rainer rainer 3324661 2021-06-29 15:48 ScanGear-ADF-Doc.png<br> -rwx------ 1 rainer rainer 11142577 2021-06-29 15:49 ScanGear-ADF-None.png<br> -rwx------ 1 rainer rainer 15357308 2021-06-29 15:49 ScanGear-Flatbed.png<br> $<br><br>Files "ScanGear-ADF-Doc.png" and "ScanGear-Flatbed.png" are similar in<br>size and quality to the files I originally obtained using "scanimage" on<br>Linux, while the quality of file "ScanGear-ADF-None.png" is comparable<br>to that of "ScanGear-Flatbed.png". So setting "Image Adjustment" to<br>"None" in the "ScanGear" GUI does produce a decent ADF scan on the MB-<br>5150. Now we "just" need to get the same result from the "pixma"back-<br>end ...<br><br>By the way: On their web site at<br><br> <a href="https://www.canon-europe.com/support/consumer_products/products/fax__multifunctionals/inkjet/maxify_mb_series/maxify_mb5150.html?type=drivers&language=en&os=linux%20(64-bit)">https://www.canon-europe.com/support/consumer_products/products/fax__multifunctionals/inkjet/maxify_mb_series/maxify_mb5150.html?type=drivers&language=en&os=linux%20(64-bit)</a><br><br>Canon is offering the source code for both, an IJ Printer Driver version<br>5.40 and ScanGear MP version 3.40, of which the former is even available<br>as Gentoo package "net-print/cnijfilter2" version 5.90. Would these be<br>of any help?<br><br>Sincerely,<br> Rainer<br></blockquote><br>However, up to now I never received an answer. Did I just miss it or is<br>there really nothing to be done to make _scanner access now easy_ for<br>the Canon Maxify MB5150?<br><br>Sincerely,<br> Rainer<br><br></pre></blockquote></div><br>-- <br>Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser ma brièveté.</body></html>