Nonlocal variational model and filter algorithm to remove multiplicative noise

作者：Chen, Dai Qiang^*; Zhang, Hui; Cheng, Li Zhi

来源：Optical Engineering, 2010, 49(7): 077002.

DOI：10.1117/1.3463019

• nonlocal method
• multiplicative gamma noise
• total variational model
• alternating minimization

The nonlocal (NL) means filter proposed by Buades, Coll, and Morel (SIAM Multiscale Model. Simul. 4 (2), 490-530, 2005), which makes full use of the redundancy information in images, has shown to be very efficient for image denoising with Gauss noise added. On the basis of the NL method and a striver to minimize the conditional mean-square error, we design a NL means filter to remove multiplicative noise, and combining the NL filter to regularity method, we propose a NL total variational (TV) model and present a fast iterated algorithm for it. Experiments demonstrate that our algorithm is better than TV method; it is superior in preserving small structures and textures and can obtain an improvement in peak signal-to-noise ratio.

• 出版日期2010-7-10
• 单位中国人民解放军国防科学技术大学