Title :
A novel method for shot noise removal in medical ultrasound images
Author :
Zha, Daifeng ; Qiu, Tianshuang ; Guo, Dongmei ; Chen, Zhibin
Author_Institution :
Sch. of Electron. & Inf. Eng., Dalian Univ. of Technol., China
Abstract :
Ultrasonic images are generally affected by multiplicative shot noise. This paper analyzes and models the coefficients of 2D multiresolution wavelet decomposition of logarithmically transformed images using the alpha stable distribution. We propose a new function that performs the nonlinear operation on the data of classifying the coefficients, thus obtaining a new noise-removal method based on multiresolution wavelet decomposition and the alpha stable model.
Keywords :
biomedical ultrasonics; image classification; image denoising; image resolution; medical image processing; shot noise; statistical distributions; wavelet transforms; 2D multiresolution wavelet decomposition; alpha stable distribution; coefficient classification; logarithmically transformed images; medical ultrasound images; multiplicative shot noise; noise-removal method; nonlinear operation; shot noise removal; ultrasonic images; Additive noise; Biomedical imaging; Discrete wavelet transforms; Filtering; Image analysis; Image resolution; Signal resolution; Ultrasonic imaging; Ultrasonography; Wiener filter;
Conference_Titel :
Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9015-6
DOI :
10.1109/ICCCAS.2005.1495261
