单连通区域 the simple connecting area
多连通区域 [计] multiply connected domain ; [计] multiply connected region
连通区域 [数] connected region ; connected components ; Connected area
复连通区域 complex connected region
多重连通区域 multiply connected region
八连通区域 connected field
颜色连通区域 color-connected regions
有界连通区域 bounded connected domain
最小连通区域 Minimum Connection Region
连通区域提取 connected regions labeling
提出了基于等价类行程的连通域算法，通过计算字符图像背景区域连通域提取手写字符图像的孔洞特征。
Through calculating the connected components of the background area of character image, hole features of a handwritten character image can be extracted.
这两个区域不是连通的。
一个向量场,如果定义在单连通区域并且旋度为零，那么它就是一个梯度场，并且其上的线积分与路径无关。
OK, so, we've seen that if we have a vector field defined in a simply connected region, and its curl is zero, then it's a gradient field, and the line integral is path independent.
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