关键词: 单水平集方法, C-V模型, 图像分割, 多目标轮廓提取

Abstract: The Chan and Vese mode can only extract single object contour，because it considers too much of the interior and exterior information.That leads the evolving curve to a wrong position for the multi-objects image.Focusing on the limitation，this paper proposes a new simple mode，which only considers the exterior information of the evolving curve，and presents several experimental results under different conditions.It shows that this mode not only keeps the CV mode’s advantages，but also can implement contour extraction on a part of multi-objects images.Moreover，the initial curve can be anywhere in the image，and the sign distance function doesn’t need to be reinitialized.Meanwhile，it is efficient and antinoise.

Key words: single level set method, Chan-Vase（C-V） model, image segmentation, multi-objects contour extraction