The whole question of lens sharpness...

Started Jun 12, 2013 | Discussions thread
hjulenissen
Senior MemberPosts: 1,611
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Re: The whole question of lens sharpness...
In reply to olliess, Jun 23, 2013

olliess wrote:

Furthermore, no matter how "small" (in physical units) your PSF is, it will become relatively "large" with increasing resolution.

Large in terms of number of pixels, not larger in terms of picture height/width. Pseudo-inverting a 100x100 element smooth (lowpass) kernel could not be that much harder than pseudo-inverting a 10x10 element kernel as long as expectations of recovering high-frequency data are relative to SNR, and not relative to sensel density? From my simple non-mathematician, non-heat-equation background, I would assume that something like Wiener filtering provides a pedagogic starting-point for the non-blind image deconvolution problem.

When we have the next megapixel monster, it will probably be an even better instrument for being practically limited by the lens alone. Good deconvolution would seem to have even better conditions for removing as much as practically possible of the lense errors, provided that sensor noise also continues to improve.

-h

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