Speckle Suppression in Echocardiogram based on Bilateral Filtering and Piecewise Linear Transformation

The speckle noise in the echocardiogram reduces the image quality and brings difficulties to the clinical diagnosis and subsequent image processing. In order to effectively remove noise, this paper proposes a method for suppressing echocardiographic speckle noise based on bilateral filtering and piecewise linear transformation. Firstly, bilateral filtering is applied to filter the echocardiogram, then a sine-type function is applied to enhance the brightness of the image, and finally the piecewise linear transformation is applied to adjust the contrast of the image. Experimental results show that this method can effectively suppress speckle noise in echocardiograms, highlight the various chamber areas in the echocardiogram, improve contrast, and provide a good basis for clinical diagnosis and subsequent image feature extraction and recognition.