Contrast Study of Side Scan Sonar Image Enhancement Methods

Aiming at the problems of grayscale distortion, low contrast, and unobtrusive targets of side-scan sonar images, this paper uses five image enhancement methods for comparative experimental analysis. Analyzed five image enhancement algorithms: histogram equalization (HE), grayscale stretching (GS), mean filter (MF), Retinex (MSR) and wavelet transform (WT). Experiments were performed on three side scan sonar images. Experiments show that the three methods HE, GS, and MSR can effectively improve the image quality to a certain extent. The image enhancement effect of the MF method is not obvious, and the effect of the WT method is poor.