The whole question of lens sharpness...

Started Jun 12, 2013 | Discussions thread
Alphoid
Senior MemberPosts: 2,610
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Re: The whole question of lens sharpness...
In reply to olliess, Jun 21, 2013

olliess wrote:

The law of entropy comes to mind.

There is no such thing as 'the law of entropy.' There is a quantity called entropy that is a property of a thermodynamic system. There are a few laws about it (you may be thinking of the second law of thermodynamics?), but it is difficult to see how they would apply.

I am genuinely curious, what theory guarantees that you can determine a unique inverse for a diffusion-type process with noise?

There is no such thing as a 'diffusion-type process.' The blur of a lens is simply a convolution with the PSF of the lens. If the PSF is exactly known, it can be exactly inverted with a deconvolution. Otherwise, it can be inverted to the degree it is known.

http://en.wikipedia.org/wiki/Deconvolution

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