I think you are wrong. When the phone takes the photo you see first the photo without processing and then the photo changes and gets worse. Try not to be a wp fan boy, we need to work together to force Nokia to fix this issue.
Sadly i'm right. There's no issue here in Lumia 925, Lumia 920 or any Lumia after Black Update, just a bunch of people thinking that they know something about it around forum.
Did you noticed that the image on smartphone's screen is ALWAYS much better than the picture? Have you been able to notice that happens with ALL smartphones? Compare screenshot with photo is wrong.
The reality is very simple. The Lumia 925 is not able to take wonderful pictures like people think it can. Not only 925, ANY smartphone, even the Lumia 1020. When you or any other guy compares a photo of the LCD screen with a real shot, just shows you do not know what you're doing.
The important thing is to compare the colors with reality, if any discrepancies are noticed, like green tint in Lumia 920, that's ok, there's a problem. But sharpening, noise or something like that, like you're doing, this is because camera is not good enough. Easy like that.
And i'm sorry, but there's no way to be mad with a smartphone camera like that above. Pictures with VERY low light conditions or low light
Now with good conditions:
How anyone can be mad with a smartphone camera like that?