Quote:
Originally Posted by JSWolf
Of the three images, I find the Libra to have better visible detail. The Kindles (in some places) have better black. But overall, the finer details such as the belt (above the rope) and her ear have noticeably better detail. The Kindles are a bit muddy in comparison.
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Alas, the loss of detail/muddiness on the Kindles is a casualty of either the scanning process or JPEG compression. Both the ear and belt actually look fine to my naked, nearsighted eye.
The Libra lost light shaded detail on the moon (above Beat). It does a better job of dithering on the moon glow in this case, though. I notice some banding on the PW3 and 4.
Quote:
Originally Posted by JSWolf
I'd like you to try the following (if you don't mind). Take this image and make it a cover for an ePub. Send that ePub to the Libra with the option to dither it as grayscale. Copy the image off of the Libra and view it on each device and see how it looks. There should be no dithering from any of the devices as it's already dithered for eInk. That would show how the different screens look.
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I typically don't use send to device on Calibre. Is dithering an option on the default Kobo device driver?
That said, the Libra H2O and Paperwhites have different resolutions so the image will likely be resized/resampled and then re-dithered by the Kindle. Besides, can't figure out a way to make Manga EPUBs and AZW3s for use with native reader short of using KCC which applies significant processing and cropping.
In any case, best bet is likely to use CBZ with KOReader on both.