Image Segmentation of CV Model Combined with Sobel Operator

Aiming at the problem that CV model cannot segment the image with uneven grayscale well, a method combining differential information with CV model is proposed. Sobel operator is used to detect the edge information of the target. It adds differential information to grayscale values. Sobel operator is combined with CV model. The energy functional is constructed and grayscale mean of that is replaced by the grayscale mean with differential properties. The curve is approached to the target contour until the energy functional converges to the minimum value. Finally, the complete target is segmented. The experimental results show that the improved method can improve the segmentation effect of images with uneven grayscale.