Comparison and Performance Analysis of Various Despeckling Methods on Echocardiographic Images

The echocardiographic images consist of multiplicative noise due to heart motion, therefore despeckling in echocardiographic images is required. The performance of the median filter on various window sizes, Fourier ideal and Butterworth filter on various cut-off frequencies, wavelet filter with or without eliminated bands and Homomorphic Fourier Ideal Filters has been tested on the echocardiographic image. When the lower band is removed, the wavelet transform produces the best despeckled images. The despeckled results have significantly improved visualization. The eliminated lower band wavelet transform gives highest values of peak signal to noise ratio, signal to noise ratio and lowest mean square error.