Speckle Noise Reduction for Ultrasonic Images Using Homomorphic Wavelet-based MMSE Filter

호모모르픽 웨이브렛 기반 MMSE 필터를 이용한 초음파영상의 스펙클 잡음 제거

In this paper, a MMSE filter in homomorphic wavelet transform domain is proposed for restoring an ultrasonic images corrupted by speckle noise. In order to remove effectively the speckle noise which is a kind of multiplicative noise, speckle noise is transformed into a form of additive noise and then the additive noise is denoised through the MMSE filter in homomorphic wavelet transform domain. The proposed method shows much higher quality in terms of ISNR and subject quality.