3 ms·

Wait: informations is lost if the blur is truly a gaussian process. The simulation of blur by means of a convolution can perfectly well be reversible. Image bl

Wait: informations is lost if the blur is truly a gaussian process. The simulation of blur by means of a convolution can perfectly well be reversible. Image blur is not a gaussian process.

young_unixer 6y ago
Are you saying that convolution with a gaussian kernel is not real gaussian blur? I'm legitimately asking. I'm really ignorant about this subject.
- teenbear 6y ago
  In theory it is, in reality there is discretization of the signal and noise
- pfortuny 6y ago
  No: it is a simulation, because it is a discretization and the map can be injective (or “almost so”).