In this paper, we altered the speed function of vector C-V model and make model detect the edge of ROI faraway from origin curve by eliminating the suppression of Dirac function to none-zero level set.

• 本文改进了Chan-Vese向量分割模型的速度函数,消除了Dirac函数对非零水平集的抑制,使模型检测出远离初始轮廓线的图像边缘。