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Old 07-31-2025, 10:56 AM   #1043
jhowell
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Posts: 7,121
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Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by bustacap View Post
is there a way to fix these 1-2 pixel borders on the right and bottom edge when converting from kfx to epub using the from kfx menu?
Quote:
Originally Posted by bustacap View Post
all images in several comics and manga by different (german) publishers. the azw3 versions of the same titles (when they were still available) didnt have this and the versions on the webreader dont have this either (not that i can tell anyway).
the from kfx log says theyre pdf. using mutool (tested with both artbox and cropbox) on the pdf doesnt leave that pixel edge. looking at the pdf, there seems to be a tiny sub pixel (<1/10th maybe) line
The KFX Input plugin uses calibre's built-in "page_images" PDF to JPEG conversion routine which in turn uses pdftoppm included with calibre.

I have looked at several books available to me in KFX format that use PDF as the internal image format. So far I have not seen the problem you describe in the JPEG files produced when converting those to EPUB using From KFX.

In order to research this further I would need access to a book that exhibits the problem. Posting copyrighted material is not allowed here on MobileRead but if you PM me a link to somewhere I can download one the those KFX files I will look into it.
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