Comments on: iPhone Dithers Images

By: janci

janci — Sun, 18 Apr 2010 03:15:00 +0000

Dithering … is not there anymore in the 4.0 beta. I hope it will not come back in the 4.0 final :O

By: http://jorge.cortell.net » ¿Hasta dónde llegarías por el eyecandy?

http://jorge.cortell.net » ¿Hasta dónde llegarías por el eyecandy? — Fri, 28 Sep 2007 10:11:29 +0000

[...] que me conoce sabe que me pierde el eyecandy. Pero lo que algunos son capaces de hacer para conseguir, por ejemplo, que sus imágenes de fondo de escritorio en el iPhone se vean un [...]

By: mergemedia

mergemedia — Wed, 12 Sep 2007 01:26:25 +0000

I don’t seem to notice the dithering too badly. I made about 100 iPhone wallpapers so far, and none of them look horrible. I agree with Keith tha iTunes has a decent dither algorithm.

If you care, you can check out the examples at http://www.iphone-wallpapers.net/

Enjoy!

By: Keith

Keith — Mon, 10 Sep 2007 00:21:07 +0000

For what it’s worth, the dither algorithm used by iTunes appears to do a very good job; the dither results are superior to what I can generate in Photoshop. To me at least, it feels more like a very fine grain than a butchered photo.

Between that and the high-resolution screen, it appears that most users neither noticed nor cared. But those trained to look for detail in photos, such as designers and photographers, will probably notice, and possibly be irked.

By: Ged

Ged — Sun, 09 Sep 2007 21:43:37 +0000

Wolfgang, yep, all synced images get dumbed down, even the photos. That image you linked to will probably show the dithering pretty badly I fear.

Most of the time, the screen’s high DPI means that you don’t notice the dots, but for areas of subtle gradations and smooth color shifts, it becomes very apparent. I hope they fix it in a software update as well. The more people that let them know, the better.

By: Wolfgang Ante

Wolfgang Ante — Sun, 09 Sep 2007 11:15:35 +0000

Yes, you write it already, but just to confirm: All photos, not only wallpapers, are photos are converted to 8-bit PNG? Really?

Whoa, that is a major flaw! I was really looking forward to have my portfolio of photos on the iPod touch, but with this the whole photo part is pretty much useless.

No, really. How will this look dithered, for example:
http://www.flickr.com/photos/wolfgang-ante/509615831/

This has to be fixed with a software update!