A Guided Filtering Method Based on Shen-Castan Operator

Abstract

A guided filtering method based on Shen-Castan operator is proposed to solve the problem of a large amount of noise attached to the ultrasound image. In this method, the edge detection result of the Shen-Castan operator was used to reduce the edge halo phenomenon of the guided filter. Apply the Shen-Castan operator to perform edge detection on the noisy image; the edge detection result will be returned to the original image to obtain an edge enhanced guide image; this image will be used as a guided image of the noisy image for guided filtering. Through the simulation experiment, the guided filtering method based on the Shen-Castan operator can not only maintain the original function of smoothing noise, but also improve the signal-to-noise ratio and structural similarity of the passenger peak.