Bug 41509

Summary: Recommended book cover dimensions should be included on upload
Product: Koha Reporter: Esther Melander <esther.melander>
Component: CatalogingAssignee: Bugs List <koha-bugs>
Status: NEW --- QA Contact: Testopia <testopia>
Severity: enhancement    
Priority: P5 - low CC: david, m.de.rooy, n.gagnon
Version: 25.05   
Hardware: All   
OS: All   
See Also: https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33674
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Description Esther Melander 2025-12-31 20:00:40 UTC
It would be nice if Koha included recommended dimensions for book cover images in all the places where a cover image can be uploaded. The Koha manual seems to indicated uploaded images will be processed into 140 x 200 or 600 x 800, but it's not really clear if these are recommended dimensions to begin with. Anytime images are processed, images can be distorted if the original image does not have the correct aspect ratio. It would also help the appearance of the cover images when displayed in the catalog to be more consistent.

So perhaps a two-part bug:

What are the recommended dimensions?

Add the recommended dimensions to the upload pages:
1. Bibliographic detail, images tab and upload screen.
2. Add to Tools > Upload?
Comment 1 David Nind 2025-12-31 21:32:19 UTC
Happy to update the manual if we can get some consensus on what the recommended sizes are (and that match up with how Koha actually works).

I'm also not sure whether this also has some interaction with the display of cover images from other sources, such as Amazon or Coce.
Comment 2 Owen Leonard 2026-01-02 14:22:47 UTC
(In reply to Esther Melander from comment #0)
> Anytime images are processed, images can be distorted if the
> original image does not have the correct aspect ratio.

Can you give an example? I just tried it with a 1920x1080 image and the aspect ratio was not changed.
Comment 3 Esther Melander 2026-01-02 16:04:13 UTC
I was speaking generally. I also wrote this bug before I learned Koha processed the images by percentage rather than the forced dimensions mentioned in the manual.