Ben, just thought of two more things: - there's a "." before the 144 in your density line 'org.dspace.app.mediafilter.ImageMagickThumbnailFilter.density =. 144' - there's also a dspace-tech mailing list if you're stuck where you might get better answers
On Tue, Feb 6, 2024 at 2:05 PM Keith Gilbertson <[email protected]> wrote: > Ben, > > My colleague Philip sent this to me because we're also working on > replacing thumbnails. I can't tell from the email text which character you > have in the parameter before the handle. We're using a lowercase "eye" - > "-i". If you want you can also try without the -p "ImageMagick PDF > Thumbnail" just for your test item. > > --keith > > > On Tue, Feb 6, 2024 at 6:13 AM Ben Parkes <[email protected]> wrote: > >> Hello, >> >> >> >> I have been trying to improve the quality of the thumbnails produced by >> dspace in one of the repositories I manage. I have been following the >> documentation for implementing ImageMagick ( >> https://wiki.lyrasis.org/display/DSDOC7x/ImageMagick+Media+Filters) but >> now that I have it set up I do not see any improvements in the thumbnail >> quality. I have increased the density to 144 and above, rerun filter-media >> on a specific test item and then reloaded the page clearing the cache but >> each time I do not see any changes in the thumbnail quality. >> >> >> >> I have set the density configuration in dspace.cfg/local.cfg to be: >> >> org.dspace.app.mediafilter.ImageMagickThumbnailFilter.density =. 144 >> >> >> >> Then run the command to refilter the bitstream on my test item: >> >> ./dspace filter-media -p 'ImageMagick PDF Thumbnail' -v -f -I 12345/12345 >> >> >> >> This should force the thumbnail to be regenerated using ImageMagick for >> the test item, which I believe it is from the command line output, but the >> quality of the thumbnail does not appear to change regardless of what value >> I set the density to. >> >> >> >> Following the documentation above I have also updated the configuration >> to include all the other detailed changes to conversion utility path, >> supported file formats, overwriting the existing thumbnails, flattening the >> pdfs, and icc profiles in case the pdf is formatted to cmyk. >> >> >> >> I am curious if ImageMagick has a limit to the quality of the thumbnails >> it can produce or that somehow dspace is not passing the density value >> correctly? >> >> >> >> Any advice would be very welcomed. >> >> >> >> Thank you, >> >> Ben >> >> >> >> ____________________________ >> >> Ben Parkes >> >> Digital Library Software Developer >> >> Digital Library, Library & University Collections, University of >> Edinburgh >> >> Argyle House, Lady Lawson Street, Edinburgh EH3 9DR >> >> Pronouns: He, him, his >> >> >> The University of Edinburgh is a charitable body, registered in Scotland, >> with registration number SC005336. Is e buidheann carthannais a th’ ann an >> Oilthigh Dhùn Èideann, clàraichte an Alba, àireamh clàraidh SC005336. >> >> -- >> All messages to this mailing list should adhere to the Code of Conduct: >> https://www.lyrasis.org/about/Pages/Code-of-Conduct.aspx >> --- >> You received this message because you are subscribed to the Google Groups >> "DSpace Community" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/dspace-community/DB9PR05MB76924D0222BC86D85A49D5F7BE462%40DB9PR05MB7692.eurprd05.prod.outlook.com >> <https://groups.google.com/d/msgid/dspace-community/DB9PR05MB76924D0222BC86D85A49D5F7BE462%40DB9PR05MB7692.eurprd05.prod.outlook.com?utm_medium=email&utm_source=footer> >> . >> > -- All messages to this mailing list should adhere to the Code of Conduct: https://www.lyrasis.org/about/Pages/Code-of-Conduct.aspx --- You received this message because you are subscribed to the Google Groups "DSpace Community" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dspace-community/CAOgKO9nPUmxsBk6WV4u78jaavp8onEc9aA8Uiq4Pmf%3D-bqEUyA%40mail.gmail.com.
