JIP_V2_N2_RP1 Devanand Bhonsle Vivek Chandra G.R. Sinha Journal on Image Processing 2349-6827 2 2 1 5 Dual Tree Complex Wavelet Transform (DTCWT), Bivariate Thresholding, Additive White Gaussian Noise (AWGN), Speckle Noise, Peak Signal to Noise Ration (PSNR) This paper introduces bivariate thresholding based Dual Tree Complex Wavelet Transform (DTCWT) technique to remove both Gaussian and speckle noise signals. Since both types of noises are different in nature hence it is difficult to remove them by using single filter. In this paper DTCWT approach is used to denoise ultrasound images. DTCWT based filter removes Additive White Gaussian Noise (AWGN) effectively. Since speckle noise is multiplicative in nature; it is converted into logarithmic transform before applying wavelet transform. Bivariate shrinkage (soft thresholding) function is used. April - June 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=3400