Research on the Image Enhancement Technology of Underwater Image of Supercavitation Vehicle

Supercavitation technology is a revolutionary method that significantly reduces the forward resistance to underwater vehicle. Accurate cavitation model for supercavitating vehicle's position control and trajectory tracking is necessary. In this paper, according to the research theory of the cavity shape of supercavitating vehicle, combined with edge detection technology of image enhancement technology, such as Gaussian smoothing, histogram equalization, threshold segmentation, Roberts operator and Canny operator and so on, underwater image of the supercavitating vehicle was analyzed and conducted, and the edge courter of the supercavitation shape was obtained. Polynomial fitting was performed on the edge pixels, and the bubble model calculation formula was modified according to the fitting result. Experiments show that the enhancement method presented in this paper improves the detail performance and reduces the image noise. It provides a method for accurately obtaining the important information such as the outer edge of the supercavitation.