Canon Line Offset Noise

Started Oct 20, 2009 | Discussions thread
Steen Bay Veteran Member • Posts: 7,418
Re: The look of sharpened noise

GaborSch wrote:

Steen Bay wrote:

What I meant is, that normal random noise doesn't appear as maze if sharpened

Well, here is an example, from one of the 7D raw files posted by bronxbombers, NR off, strong sharpening by DPP, 200% view:

Yes, it ain't pretty, I think we can agree about that, but Bronxbombers' 7D had this additional issue with unbalanced green gains, which confuses things a bit. I started this subthread wondering why mazing was so visible in Hulkster's 7D and (especially) 50D DPP test pics (sharpening 3, which isn't strong) at 100%, from ISO 400 and up, and I think it's (more or less) clear that the mazing must be created by the demosaicing algorytm in its attempt to maximize the amount of detail. Is the maze a real problem? Maybe not, it's probably just the visible effect of the compromises made in the demosaicing process, but it certainly isn't pretty at 100% view!

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