Quote:
Originally Posted by Brett Merkey
Changing resolution can be a complex process that may not attain desired results. A 300x300px image at 300ppi will be one inch across in a Paperwhite 3+ but will (without device intervention) take up the entire screen of a 150ppi tablet. What seems to happen is that many devices re-interpret image resolution to best fit the screen.
I am quite happy with altering file size (compression) or pixel dimensions when necessary. These are things Calibre can do, even tho as separate tools in the user interface.
|
Curious, aside from conversion, how do you change resolution of images inside a book using Calibre (not just cover but other embedded images as well)?
There's only so much that changing compression ratio will do. I have books with 12 megapixel images. For books I deem unreasonably large, I unpack, then use IrfanView to batch resize and convert, overwriting in place (JPEG compression 75%), then repack.