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Old 07-16-2020, 04:02 PM   #1
netman49
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Cover resizing while converting to ePub
Hi.

I've entered a cover image of 1400 x 1900 pixels (either jpg or .png format) in the Metadata Page of an eBook in Calibre.
After converting that eBook to ePub I noticed that the cover image was blurred.
When going into the source code of the ePub file I saw that the cover.jpeg image was reduced to 873 x 1186 pixels.

How come?

Is there a setting in Calibre were I can state that the cover must not be reduced but keep the original size?
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Old 07-16-2020, 04:10 PM   #2
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Images are scaled during conversion based on the "Output profile" selected in the "Page setup" tab. Select "Tablet" to disable image scaling.
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Old 07-16-2020, 05:02 PM   #3
JSWolf
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This may be your problem. Under Preferences and then Tweaks is a setting The maximum width and height for covers saved in the Calibre library. I do not know what the default settings are. I've changed mine to 3000, 4000 just so I won't have an issue with any cover size I put in Calibre.
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Old 07-17-2020, 01:49 AM   #4
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Thanks all for your advice!
The problem is indeed solved when I choose another output device in the Page setup settings of the "Convert Books" section.
In my case I choose "Generic e-ink HD".
Now the original image size is kept.
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Old 07-17-2020, 01:32 PM   #5
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Quote:
Originally Posted by netman49 View Post
Thanks all for your advice!
The problem is indeed solved when I choose another output device in the Page setup settings of the "Convert Books" section.
In my case I choose "Generic e-ink HD".
Now the original image size is kept.
Much the same as tablet, that option has the screen size set to unlimited.
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Old 07-17-2020, 02:19 PM   #6
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I think the eInk also grey scales the image, while Tablet leaves it in color
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Old 07-17-2020, 02:37 PM   #7
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I think the eInk also grey scales the image, while Tablet leaves it in color
That would have been good, but it's not so. I just tested it and the cover is still in color.
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