Feature Request: Polish Books, Remove Unused Images

Jaws · 11-13-2020, 01:31 PM

Polish Books is an extremely useful part of Calibre. There's one thing it doesn't do, though: Remove images that aren't referenced anywhere in the epub. It will remove unused CSS rules; it will remove uncalled embedded fonts; but won't do anything about images (especially publisher-inserted ads) that aren't called because, say, I reflexively remove publisher ad pages...

It seems to me that whatever code is used to determine whether a font is ever called, or a CSS rule is ever called, should be relatively easily adaptable to determining whether an image is ever called. (And for older/malformed epubs, the rule can say "always keep cover.jpg and cover.jpeg".)

I've been able to confirm that Polish Books does NOT do this. Am I missing somewhere else that does it, or is this something to consider for future updates?

theducks · 11-13-2020, 04:35 PM

Do you really want Auto destroy?
Personally, I would use the editor and examine (or run the bug ) and that will allow you to open (look at) the image. If truly unwanted (and not a coding error

orphan), simply go over to the File Browser : images section and delete it: save

ownedbycats · 11-13-2020, 11:42 PM

Modify ePub plugin has "remove unused image files" already.

11-13-2020, 01:31 PM	#1
Jaws JCL Punch-Card Collector Posts: 90 Karma: 34468 Join Date: Jun 2014 Location: Antarctica Device: Aggressively Device Independent	Feature Request: Polish Books, Remove Unused Images Polish Books is an extremely useful part of Calibre. There's one thing it doesn't do, though: Remove images that aren't referenced anywhere in the epub. It will remove unused CSS rules; it will remove uncalled embedded fonts; but won't do anything about images (especially publisher-inserted ads) that aren't called because, say, I reflexively remove publisher ad pages... It seems to me that whatever code is used to determine whether a font is ever called, or a CSS rule is ever called, should be relatively easily adaptable to determining whether an image is ever called. (And for older/malformed epubs, the rule can say "always keep cover.jpg and cover.jpeg".) I've been able to confirm that Polish Books does NOT do this. Am I missing somewhere else that does it, or is this something to consider for future updates?

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11-13-2020, 04:35 PM	#2
theducks Well trained by Cats Posts: 31,325 Karma: 62025226 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Do you really want Auto destroy? Personally, I would use the editor and examine (or run the bug ) and that will allow you to open (look at) the image. If truly unwanted (and not a coding error orphan), simply go over to the File Browser : images section and delete it: save

11-13-2020, 11:42 PM	#3
ownedbycats Custom User Title Posts: 11,383 Karma: 79699999 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	Modify ePub plugin has "remove unused image files" already.

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