[Koha-bugs] [Bug 22988] New: Visible reduction in image quality

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=22988

            Bug ID: 22988
           Summary: Visible reduction in image quality
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P5 - low
         Component: OPAC
          Assignee: oleonard at myacpl.org
          Reporter: magnus at libriotech.no
        QA Contact: testopia at bugs.koha-community.org
  Target Milestone: ---

I have a library that is noticing a visible reduction in image and thumbnail
quality after upgrading from 18.11.03 to 18.11.05. This could be a regression
from bug 21987. 

They have a lot of scanned black and white covers. The largest text in the
thumbnails used to be readable, but after the upgrade, it is not. Their
scanning process has not changed, so the original image that they upload should
be of the same quality as before. 

Old, good image:
http://bibliotek.dis-danmark.dk:8080/cgi-bin/koha/catalogue/image.pl?imagenumber=4332
http://bibliotek.dis-danmark.dk:8080/cgi-bin/koha/catalogue/image.pl?imagenumber=4332&thumbnail=1

New, not so good, image:
http://bibliotek.dis-danmark.dk:8080/cgi-bin/koha/catalogue/image.pl?imagenumber=4463
http://bibliotek.dis-danmark.dk:8080/cgi-bin/koha/catalogue/image.pl?imagenumber=4463&thumbnail=1

Did we reduce the quality a bit too much?

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