Enhancement and Despeckling of Echocardiographic Images (original) (raw)

2018

Abstract

This chapter introduces enhancement and despeckling techniques for echocardiographic images. For the accurate diagnosis of cardiac diseases, it is important that the image is enhanced and made free from the speckle noise. To highlight some features of interest in the image, enhancement techniques can be used. The contrast enhancement has been achieved using the proposed modified log transformation technique and the images have been despeckled using the two newly developed techniques, namely, the Hybrid Speckle-Reducing Anisotropic Diffusion (HSRAD) filter and the Modified Nonlinear Complex Diffusion (MNCD) filter for cleaning the images of the multiplicative speckle noises. The MNCD filter is designed to remove the speckle noise from the images more effectively and offer much better enhancement even from the finer details of the images. The performance of the MNCD filter has been found to be much better than the existing despeckling filters with particular reference to the echocardi...

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