Cover thumbnails too small

MSWallack · 08-08-2023, 10:17 AM

I use Calibre to manage my books and send them to my Kobo Sage via USB. Several of the books that I've sent to the Kobo show tiny cover thumbnails (or, perhaps, half the size of the thumbnails for most books). I've checked in Calibre and the covers for those books appear to be the same size and resolution as the covers that display correctly. I've tried deleting the covers and then downloading them again from the web before replacing the book on the Kobo but that hasn't helped. Any thoughts as to what else I might look for to try to track down the issue?

Martinoptic · 08-08-2023, 11:31 AM

epub 2, epub 3 or kepub?
I’ve noticed on ADE 4.5 that epub3 covers render small, where epub2 are ok.
I realise that you are on Kobo but perhaps there is a similar reason?
No doubt people with more experience wil be along soon.

DNSB · 08-08-2023, 01:14 PM

Are you resizing the cover images before embedding them in the epub? If you have KoboUtiliities installed, have you tried sending the cover images from there and then restarting your Kobo to overwrite the cached copy?

MSWallack · 08-09-2023, 11:08 AM

Quote:

Originally Posted by DNSB

Are you resizing the cover images before embedding them in the epub? If you have KoboUtiliities installed, have you tried sending the cover images from there and then restarting your Kobo to overwrite the cached copy?

I think I've tried resizing and not resizing (but the size that Calibre shows seems to be around the same size as other images that display correctly). I haven't tried KoboUtilities, so I guess that's the next step.

08-08-2023, 10:17 AM	#1
MSWallack Right, Except When Wrong Posts: 363 Karma: 4323767 Join Date: Aug 2007 Location: Indianapolis Device: Kindle Oasis 3 (sometimes iPad Mini).	Cover thumbnails too small I use Calibre to manage my books and send them to my Kobo Sage via USB. Several of the books that I've sent to the Kobo show tiny cover thumbnails (or, perhaps, half the size of the thumbnails for most books). I've checked in Calibre and the covers for those books appear to be the same size and resolution as the covers that display correctly. I've tried deleting the covers and then downloading them again from the web before replacing the book on the Kobo but that hasn't helped. Any thoughts as to what else I might look for to try to track down the issue?

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08-08-2023, 11:31 AM	#2
Martinoptic Bibliophist Posts: 7,020 Karma: 7173892 Join Date: Dec 2021 Location: England Device: none	epub 2, epub 3 or kepub? I’ve noticed on ADE 4.5 that epub3 covers render small, where epub2 are ok. I realise that you are on Kobo but perhaps there is a similar reason? No doubt people with more experience wil be along soon.

08-08-2023, 01:14 PM	#3
DNSB Bibliophagist Posts: 46,183 Karma: 168983734 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Are you resizing the cover images before embedding them in the epub? If you have KoboUtiliities installed, have you tried sending the cover images from there and then restarting your Kobo to overwrite the cached copy?