定位边界 meaning in English

position boundary

First , the authors uses regional growing algorithm based on seeds point selected by manual work to ascertain the main area awaits to be segmented , then taking advantage of the precision of the edge tracing method to precisely define the boundary and thus to attain the precise segmentation
先用人工选取种子点的区域增长算法确定待分割组织的主体区域，再利用边缘跟踪法对细节处理较好的特点精确定位边界，从而达到准确分割的目的。