Comments on "Staircase effect alleviation by coupling gradient fidelity term"

Authors:
Liang Xiao;Lili Huang;Zhihui Wei
Affiliations:
School of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing 210094, PR China and Department of Electrical, Computer, & Systems Engineering, Rensselaer Polytech ...;School of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing 210094, PR China;School of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing 210094, PR China
Venue:
Image and Vision Computing
Year:
2010

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Abstract

The paper ''staircase effect alleviation by coupling gradient fidelity term'' (Zhu Lixin and Xia Deshen, 2008 [1]) presented a nonlinear diffusion approach using a coupling gradient fidelity term. Although such approach helps to alleviate the staircase effect to some extent, the model is not sound. Moreover the physical mechanism of this model was explained incorrectly, and there are some theoretical mistakes in their proofs and propositions. We propose a new theoretical analysis of the alleviation staircase effect using a coupling gradient fidelity term.