最小周长 meaning in English

minimum perimeter

When researching the pick - up of image - feature , this paper pick up the parameters of whole structure configuration and put forward a method of rapid polygon approach ; after analyzed the parameter of the whole structure , the thresholds can be found ; 3 . when researched sort technology of the network of nerve , a network of nerve named art which can recognize the known disfigurement and unknown disfigurement is designed ; 4
深入研究缺陷图像的特征参数提取技术。本文利用数学结构形态学的方法对缺陷图像的整体特征参数进行了提取，并提出了一种快速多边形逼近算法?最小周长法；通过对缺陷整体特征参数的分析，找到了不同缺陷的特征参数阈值。