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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?
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