Image Quality Decrease when set as Wallpaper - Why?


i having problem ipod touch, i'm posting here because 1. it's troubleshooting forum , 2. since appears software issue, i'm assuming same problem can occur on iphone.

i've had persisting problem seems if image quality degraded when set image wallpaper. feel colors in image become less saturated, , sharpness of image decreases. effect not drastic, it's enough notice , bothers me. far inferior products handle operation without hitch.

have posted 2 screenshots show mean. 1 image looks in photo album on ipod itself, , other looks on homescreen when set wallpaper. best way compare images save them both in full size , flip , forth. it's clear image loses both color , sharpness. images 480x320 jpegs, , great in photo album. have no idea why ipod (or iphone) this, have answers?
 

attached files:

no 1 thoughts?
 


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