An explicit Sharpness Index related to Global Phase Coherence

Abstract : We propose a definition of a Sharpness Index that is closely related to the notion of Global Phase Coherence recently introduced for automatic image restoration and image quality assessment. Using Gaussian random fields instead of random phase images, we can estimate the probability that a random image has a given Total Variation, which leads us to an explicit formula and a fast algorithm. Theoretical arguments and numerical experiments are given to assess the similarity between the Sharpness Index and the Global Phase Coherence, and an application to non-parametric blind deconvolution is presented, that illustrates the possibilities offered by this new approach.
Document type :
Preprints, Working Papers, ...
Complete list of metadatas

Cited literature [6 references]  Display  Hide  Download
Contributor : Lionel Moisan <>
Submitted on : Monday, January 23, 2012 - 10:51:35 PM
Last modification on : Thursday, April 11, 2019 - 4:02:09 PM
Long-term archiving on : Monday, November 19, 2012 - 2:20:56 PM


Files produced by the author(s)


  • HAL Id : hal-00662374, version 1



Gwendoline Blanchet, Lionel Moisan. An explicit Sharpness Index related to Global Phase Coherence. 2011. ⟨hal-00662374⟩



Record views


Files downloads