Quote:
Originally Posted by Tulapi
The difference seems to be not only in the number of shades of grey, but also in the dithering. In FBreader it seems to be different and very strong. Look at the vertical/horizontal patterns in the fbreader image. |
It's probably not dithering that's going on, but rescaling of the image. If the scaling algorithm is just taking the closest pixel from the source image and copying it to the scaled image (i.e. nearest-neighbour scaling), then you can get the kind of artifacts that you see. Area averaging produces better output, but is slower. Since some people here are working on improving fbreader for the pb devices, maybe someone can add a more accurate scaling method and merge it in with the good/fast rendering options offered in the menu.