Optical Spatial Frequency Filtering of Image Sensors ?

Started 7 months ago | Discussions thread
Jack Hogan
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Re: Optical Spatial Frequency Filtering of Image Sensors ?
In reply to hjulenissen, 7 months ago

hjulenissen wrote:

Your link is very interesting. But I dont get your point here. I am referring to the total PSF presented in the blog post. If it can be reasonably modelled as as gaussian (or some other smooth, simple function), is not that description sufficient for most applications?

Ok, I am a bit out of my depth here and I am sure you understand the detail better than I do. My point was that you can indeed model it as a gaussian and that will get you in the ballpark - but that's nothing new and what everybody does: pretend it's gaussian and convolve/deconvolve.

With Frans' model, on the other hand, you are actually closer to the real PSF and can therefore organize your information that much better. No?  It may in the end very well be that the gaussian components of the MTF overwhelm the more specific ones, but it did not look that way in the post, especially for the D40.

Edited 7 months ago by Jack Hogan
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