Application of rough set and wavelet in medical ultrasound images denoising
Wei Hong-jian · Transducer and Microsystem Technologies · 2013
To solve speckle noise in medical ultrasound images,a denoising method is proposed based on rough set and wavelet.This method,pending ultrasound image is partitioned into several sub-images based on equivalence relation in rough set,then logarithm transform for each sub-image is operated and wavelet decomposition is accomplished,wavelet coefficients are processed by adaptive threshold function.The denoised sub-images are obtained by wavelet inverse transform and exponential transform.The final denoising image is obtained by overlying denoised sub-images.Experimental results show that the proposed method is more effective in removing the noise while preserving more edges and detail features.