How to keep resolution of pics after assigning as wallpapers?

[pistol44]

I don't know if anyone else noticed this but when you view a picture (800x480) through the Pictures tab on Touchflo the picture looks crisp, clear and detailed on full screen. However when you assign the same picture as your wallpaper it seems as though the picture resolution decreases noticeably and loses it's vibrance. It sucks because everytime I download a picture thinking how great it would look as a wallpaper it really doesn't look that great once you do. I would like to know if there is a hack/workaround to avoid this or if there is a way to create high res wallpapers that don't look lower res when you assign them as a wallpaper.