circumscribed circle meaning in English

外接圆
外切圆

In other words , each circle has two circumscribed circles
换句话说，每个圆有两个外接圆。
Then , the minimum circumscribed circle and shape principal orientation of the object region are calculated ; and the object region is divided into some blocks in the polar coordinate , which uses the center of the minimum circumscribed circle as the origin and the direction of the shape principal orientation as the direction of the polar axis , and the features of all subblocks are extracted to compose shape histograms and then smoothed ; then , combined with global features to synthetically represent the content of the image ; finally , a new image similarity is used to compute the distance between images
首先对商标图像进行预处理,得到规则二值图像;计算目标像素的最小外接圆和图像的形状主方向;在以最小外接圆圆心为原点、形状主方向为极轴方向的极坐标中将图像分块,提取各子块特征,构成形状直方图并平滑处理;再结合全局形状特征来综合表示图像内容;最后采用新的相似性度量方法计算图像间距离,实现商标图像的准确检索。