Detail-Preserving Despeckling under Multiscale Anisotropic Diffusion in Medical Ultrasound Images
(0) In this paper, a detail-preserving despeckling method is proposed for speckle suppression of displayed ultrasonic images. Our method is performed under the framework of anisotropic diffusion, and it is summarized by three steps: classification, outlier shrinkage and anisotropic diffusion. A normalized modulus multiscale product is defined and used instead of gradient as edge detection operator in the process of diffusion. Diffusion threshold is adaptively determined using classified homogeneous speckle regions to produce a robust result. To avoid speckle spreading, outliers in homogeneous regions are removed before each iteration of anisotropic diffusion. Experiments on synthetic and real displayed ultrasonic images show that the proposed method compares favorably to some other anisotropic diffusion-based and outlier shrinkage-based methods.
wavelet multiscale product anisotropic diffusion outlier shrinkage speckle suppression.
Yanfeng Gu Xiao Yu Zhaoyu Cui Lanfeng Wang Chunhong Xiu
School of Electronics and Information Engineering Harbin Institute of Technology Harbin, China Dept. of CCU and Dept. of Echocardiology Room No.1 Affiliated Hospital of Harbin Medical University
国际会议
上海
英文
242-246
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）