[ottischwenk]

Originally Posted by pazos

I talk about facts. You can review my posts in this thread. I will resume them to you to make things easier:

- ebooks use color images because their primary target isn't just e-ink devices

This may or may not be the case, I know books with 256 grayscale images, as well as some only black and white - but let's assume that.

- color images don't match the e-ink palette,

Yes.

so they're prone to color banding artifacts (as the first image in the link I gave you)

No - I don't know of any device that performs like this * - thus the following is

- dithering is applied to images to prevent these artifacts.

unnecessary.

- on device dithering (HW or SW) doesn't produce better results than preprocessing images with an specialized software, like ImageMagick, but it is way better than original images.

This reference is not necessary, because such a thing is not done when looking at the book.

I know it could be harsh for you to understand that because you have some sort of magical belief but dithering doesn't afect the resolution of an image..

If you see a pixelated image that's not because of dithering. It is a match of a low quality image paired with a css rule that enlarges the image, making its low resolution more obvious.

Your post indicates that you don't know Kobo.

Here in this forum the simulation of 256 gray levels was called dithering and so I used this one

And Kobo does this by assigning a corresponding predefined 4*4 pixel image to the average brightness value of a 4*4 pixel grid and displaying it - at 300 dpi this results in a resolution of 75 (300/4), at 227 it is 57 (227/4).

Edit *: this image cannot be displayed by EInk - it contains much more gray values at the borders of the gray levels than EInk (16) is able to display.