参数活动轮廓模型采用点集或B -样条曲线来表示模型的轮廓线，具有运算效率高的特点。

Parametric active contours represent their contours by the point sets or B-splines, and they have the efficient performance on image segmentation.

youdao

二值水平集活动轮廓模型既可以自动地处理轮廓线的拓扑变化，又具有较高的运算效率。

Binary level set active contours not only have the ability of automatically handling the topology change, but also have high computational efficiency.

youdao

传统水平集活动轮廓模型具有自动处理轮廓线拓扑变化的优点。

Traditional level set active contours have the ability of automatically handling the topology change.

youdao