，三矩形特征three-rectangle feature和四矩形特征（four-rectangle feature）分别对应图中的 ABC 和 D。其中双矩形特征定义为图中相邻两个矩形内象素颜色之和的差。
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该无缝拼接网石片由卵石与网络式纤维布胶粘成，呈矩形片状结构，其特征在于所述网片石的四周边为齿形结构。
The seamless stitching net flakes from gravel and network-fiber cloth into Stickies, a rectangular sheet structure, its features is described in the four-mesh surrounding the tooth structure.
表四是一个长方形的办法，保留现有的景观特征，并确定了矩形空地。
Sheet Four is a rectangular approach that retains existing landscape features and defines a rectangular open space.
最后利用几何约束求解出矩形模式特征的四个顶点。
Finally the rectangles' four vertexes coordinate through geometric constraints are solved.
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