1
$\begingroup$

Why does image deconvolution still work with image without sharp edges? Take this image for example:http://habrastorage.org/storage2/eff/36d/77a/eff36d77a583b46e461c12a3c0037063.png

$\endgroup$
  • $\begingroup$ There are a number of deconvoltion methods, some where the prior point spread function is known, some where it is not. Which one are you referring to? If you know the PSF you do not need to know edge locations. $\endgroup$ – Tarin Ziyaee Dec 15 '13 at 0:07
  • $\begingroup$ @user4619 How does it intuitively make sense that the information isn't simply lost, so deblurring would be imposible. $\endgroup$ – Marka Dec 15 '13 at 0:43
  • $\begingroup$ Because if you know the point-spread-function, (the function that caused the blurring), and you know the final result, you have information you need to remove the PSF's effects. This is the intuition behind it. $\endgroup$ – Tarin Ziyaee Dec 15 '13 at 16:48
  • $\begingroup$ @user4619 But it looks so fake, because it looks like all usefull info is gone. $\endgroup$ – Marka Dec 17 '13 at 0:52
  • $\begingroup$ The goal of deblurring by deconvolution is precisely to restore the edges !? $\endgroup$ – Yves Daoust Oct 25 '17 at 14:44
1
$\begingroup$

Think of it in the frequency domain.
Some of the data is highly damped.
Namely energy in High Frequency is damped with low values.

Yet, unless it is zero identically "There is hope...".

Basically, this is the idea behind deconvolution algorithms.
Restore the energy in frequencies before it was damped.

Practically, we are limited in DR.
Namely if it is damped really hard, even if it not zero, in order to restore it one would amplify it significantly which will also lead to noise.

Regarding the edges, well, assuming we have the right way to recover the enrgies edges will be restored.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.