Quote:
Originally Posted by gianni_fed
Hello,
I found a great program to reduce the weight of images without loosing quality, you know, epub are read on a display so, 72 dpi are enough for them.
The program is "FILEminimizer Pictures", you must to go in Settings (right lower corner), check the box "custom compression" and, in the next window, you can choose the resolution and the quality you want.
of course there is always the problem that you have to extract all the images you want to modify, until someone integrates this or another similar program into Calibre to make it more effective and easier to use.
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Calibre already has a utility for lossless compression of images.
You can batch run for multiple books using the built-in Polish plugin or for a single book inside the calibre Editor from an option in its Tools menu.