|Table of Contents|

Robust Estimation Based Hybrid Variational Model for Image Restoration and Application

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2007年04期
Page:
418-421
Research Field:
Publishing date:
2007-08-30

Info

Title:
Robust Estimation Based Hybrid Variational Model for Image Restoration and Application
Author(s):
XIAO Liang1WU Hui-Zhong1WEI Zhi-Hui2
1.School of Computer Science and Technology;2.School of Sciences,NUST,Nanjing 210094,China
Keywords:
im age restoration max imum a posteriori robust estim ation variat iona lmethod part ial differential equations
PACS:
TP391.41
DOI:
-
Abstract:
The connection betw een a class o f variational functionalmode ls and Bayesianmethod for image restorat ion is established from the v iewpoint ofmax imum a posteriori (MAP) estim ation. Assum ing that the gradient o f images is amember o fE-contam inated norm al distribution, a least favo rab le distribution comb in ing a quadratic w ith a linear function is derived, then a hybrid mode l in the form of tota l variational integra l and D irichlet integral is proposed. The ex istence of the variational problem is discussed and aw e igh ted grad ient descent flow for image deno ising w ith an iterative algorithm is also deve loped. Exper imenta l resu lts show that our model has good performance in image restoration.

References:

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Last Update: 2007-08-30