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| p.2 #7 · p.2 #7 · Photoshop Camera Shake Reduction: The End of IS? |
Matt Grum wrote:
The detail is there in a blurred image, it's just "encoded" in a certain way. It is totally possible to recover some or all of this detail if you know the correct way to decode it. This is where the method can be hit and miss in practice, since the software has to estimate the deconvoluition kernel, it is never known. Even if you did know the exact kernel to use, image noise can still be a problem.
Yep, assuming we had perfect noiseless images, deconvolution could be very effective, but the more noise in the image, the worse it works. Not a problem if you intend to deblur an ISO100 shot, but most low-light images or other cases where you might get blur will almost certainly be at a higher ISO, because why would you want to risk blur with a low ISO, when you can just turn it up? Noise is easy to remove; blur is not.