Invisible wrote:
> Echo, focal blur and motion blur are all instances of convolution. That 
> means, hypothetically, that by applying a suitable *deconvolution*, you 
> should be able to get back the original signal.
> 
> Question: Is it actually feasible to do this in the real world?

Without artifacting?  No.

Now you could make a huge matrix (N x N, where N is the number of 
elements in the image to be sharpened) and solve it.  But for an image 
of, say, typical embedded YouTube size, you are looking an matrix that 
is on the order of 80K x 80k elements.  Granted, most of the elements 
are zero, but it's still a headache.

Regards,
John

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