Method of Adaptive Wavelet Thresholding Used in Image Denoising
According to multi-resolution analysis of wavelet threshold denoising principle, this paper presented two improved algorithms of continuity and adaptive threshold based on hard thresholding. The soft thresholding (hyperbolic thresholding) was used in the intervals after setting two thresholds, and the isolated points were removed according to the adjacent correlation coefficient during the processing. As a result, the hard thresholding’s shortcomings were reduced. The simulation results show that improved algorithms have both better visual effect and PSNR than the traditional approaches.
Helen Zhang, Gang Shen and David Jin
H. X. Huang et al., "Method of Adaptive Wavelet Thresholding Used in Image Denoising", Advanced Materials Research, Vols. 204-210, pp. 1184-1187, 2011