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Why are my book covers sometimes so small?
#1  radius 10-18-2019, 02:26 PM
In the "My Book" library view, I have many books with covers that are displayed at different scale. See the attached photo for an example.

Does anybody know why that is? I read pretty much exclusively sideloaded epubs and Overdrive epub loans.
MyLibrary.jpg 
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#2  ZodWallop 10-18-2019, 02:55 PM
Quote radius
In the "My Book" library view, I have many books with covers that are displayed at different scale. See the attached photo for an example.

Does anybody know why that is? I read pretty much exclusively sideloaded epubs and Overdrive epub loans.
Sorry if this is a stupid question, but do they show that way in Calibre? Sometimes when I pull a cover last night, the image will have a white border around it like that. If I don't manually edit the image, that white border is seen as part of the cover.
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#3  JSWolf 10-18-2019, 03:07 PM
Sometimes older eBooks have thumbnail images of the cover and maybe these do and the cover being read as the thumbnail.

If you are using Calibre and you are side loading, have a look at what the cover looks like that Calibre has. Select the eBook and press e to get to the Edit metadata requester. Also, go to the Plugins preferences and find the KoboTouch drier and configure it to upload covers. I have black & white covers on.

Also, if any of those books are in Calibre with the correct size cover, you can use the Kobo Utilities plugin to send the cover to your Kobo.
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#4  tourneur 10-18-2019, 03:08 PM
Yeah, it seems like the white part is actually part of the image. You can crop the image, but you could end up with a low resolution image. If that's the case its worth replacing it with a high resolution cover art (use the image search of your search engine).
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#5  JSWolf 10-18-2019, 04:12 PM
Quote tourneur
Yeah, it seems like the white part is actually part of the image. You can crop the image, but you could end up with a low resolution image. If that's the case its worth replacing it with a high resolution cover art (use the image search of your search engine).
Better yet, try the download cover option of the Edit metadata requester to try to get a hi-res image.
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#6  geek1011 10-18-2019, 05:55 PM
No, this isn't due to an issue with the epub itself. This is due to a firmware change in the latest firmware, which seems to now generate covers from the first page rather than getting it from the package document. I haven't tested this much, and it may not apply in all cases. I'm planning to write a cover extractor later to work around this issue (probably next time I import a bunch of books).

Update: I just read back through this thread, and what Jon mentioned about enabling cover uploading in Calibre would have the same result, assuming you use Calibre for your ebooks.
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#7  JSWolf 10-18-2019, 06:29 PM
Quote geek1011
No, this isn't due to an issue with the epub itself. This is due to a firmware change in the latest firmware, which seems to now generate covers from the first page rather than getting it from the package document. I haven't tested this much, and it may not apply in all cases. I'm planning to write a cover extractor later to work around this issue (probably next time I import a bunch of books).

Update: I just read back through this thread, and what Jon mentioned about enabling cover uploading in Calibre would have the same result, assuming you use Calibre for your ebooks.
Which explains why I never saw the bug. But then, I make sure I have a hi-res cover or the largest cover I can find if not. And I do use Calibre. So the covers get sent to the Kobo dithered in B&W.
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#8  davidfor 10-19-2019, 12:08 AM
Quote geek1011
No, this isn't due to an issue with the epub itself. This is due to a firmware change in the latest firmware, which seems to now generate covers from the first page rather than getting it from the package document. I haven't tested this much, and it may not apply in all cases. I'm planning to write a cover extractor later to work around this issue (probably next time I import a bunch of books).
That isn't what I am seeing.

Firstly, the cover image for epubs has always been the first page of the book. The RMSDK is used to render it and take it as the cover. This is at least partly because for books with DRM, the image marked as the cover is encrypted and this is the simplest way to get something. The same goes for PDFs.

Kepubs uses the image that is marked as the cover. This might have changed somewhere. In the past, it had to be marked in the OPF as 'properties="cover-image"'. Now it looks like only the cover meta item needs to point to it correctly. Without either of these, I get the default cover with the title and format on it.
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#9  geek1011 10-19-2019, 10:25 AM
Quote davidfor
Firstly, the cover image for epubs has always been the first page of the book. The RMSDK is used to render it and take it as the cover. This is at least partly because for books with DRM, the image marked as the cover is encrypted and this is the simplest way to get something. The same goes for PDFs.
That would have explained part of what I was seeing, as I noticed this when testing seriesmeta, and for that, I tried epubs for the first time in a while.

Quote
Kepubs uses the image that is marked as the cover. This might have changed somewhere. In the past, it had to be marked in the OPF as 'properties="cover-image"'. Now it looks like the cover meta item needs to point to it correctly. Without either of these, I get the default cover with the title and format on it.
That would explain the other part of what I was seeing, and I probably thought it was the first page because the half-cover looked a lot like that.

I guess I was partly misguided about this, but there still seems to be a need for a cover-image fixer, as a few of my books that used to import correctly now have an ugly cover, so I'm working on that now. I'll also look into the second thing you said, as that's probably something I can fix in kepubify.
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#10  davidfor 10-20-2019, 10:26 AM
Quote geek1011
That would have explained part of what I was seeing, as I noticed this when testing seriesmeta, and for that, I tried epubs for the first time in a while.
You're going to have to read my posts a bit more thoroughly I've made this statement about how the cover images in epubs and kepubs are generated quite a few times over the years.
Quote
That would explain the other part of what I was seeing, and I probably thought it was the first page because the half-cover looked a lot like that.

I guess I was partly misguided about this, but there still seems to be a need for a cover-image fixer, as a few of my books that used to import correctly now have an ugly cover, so I'm working on that now. I'll also look into the second thing you said, as that's probably something I can fix in kepubify.
I just read what you quoted, and I missed the word "only". It should have been:

Quote davidfor
Kepubs uses the image that is marked as the cover. This might have changed somewhere. In the past, it had to be marked in the OPF as 'properties="cover-image"'. Now it looks like only the cover meta item needs to point to it correctly. Without either of these, I get the default cover with the title and format on it.
The cover image was always identified with that property. But, I it looks like it can also be identified using the meta item for the cover. I don't know if this is new, or has been around for a while.
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