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/CAOgKO9%3DDMWQp_xi_1i6b%2BUOQid6BOtpgQHaTquZ277oirDwQCQ%40mail.gmail.com.
