Demosaicing and bit dimensions

Started 11 months ago | Discussions thread
Mark Scott Abeln
Veteran MemberPosts: 3,995Gear list
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Re: Demosaicing and bit dimensions
In reply to The_Suede, 11 months ago

The_Suede wrote:

Using very simple lenses with known aberrations, aberrations that give effective point spreads several pixels wide, you can arrive at a very correct (and VERY sharp!) image that's about half the original size if you do the Bayer interpolation for each position on the sensor by solving backwards for the optical PSF result. This is one way to sharpen an oversampled original data map, or if you put that in another way; get the optimal, correctly sampled resolution from a system.

Unfortunately, this does of course only work with "known" lenses with PSF functions that are neither to big or to small over the entire image surface - which limits the flexibility of the system.

This seems to be the problem with Photoshop’s new Shake Reduction feature. It hasn’t worked with any image I’ve yet to throw at it. Even where I have really obvious camera motions, evidenced by multiple point sources of light, the algorithm never comes close to nailing it. At best it seems to work as a  sharpen function.

 Mark Scott Abeln's gear list:Mark Scott Abeln's gear list
Nikon D200 Nikon D7000 Nikon AF-S DX Nikkor 35mm f/1.8G Nikon AF Nikkor 50mm f/1.8D Rokinon 85mm F1.4
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