Abstract: This paper proposed a new approach for image segmentation-----BB algorithm. The advantage of this algorithm was using the current and last points' information to determine the step-size at each step. Firstly, the paper transformed the CV model into optimization problem through a variational level set method. Secondly, BB algorithm was introduced to solve the optimization problem. Then, the paper analyzed the convergence of BB algorithm, which provided a theoretical basis for the application of the algorithm in the CV model. At last, the proposed algorithm was compared with the conventional steepest descent method and conjugate descent method on several real data. The results validated that the proposed BB algorithm was faster with comparable accuracy.

Key words: image segmentation, CV model, BB algorithm