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?
> 
> If I have an image with camera shake, can you really apply some math to 
> it and get back the unblurred image? Or is that still the domain of 
> science fiction?


The hardest part in practice is determining the blur kernel.  Even if 
you can determine it exactly the result still won't be perfect, but it 
will be noticeably (potentially significantly) deblurred (at least for 
camera shake, defocus works less well).

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