公开(公告)号：US5119439A

公开(公告)日：1992-06-02

申请号：US645910

申请日：1991-01-25

申请人： Ikuo Osawa ,  Haruo Nakagawa ,  Hirofumi Kohno

发明人： Ikuo Osawa ,  Haruo Nakagawa ,  Hirofumi Kohno

IPC分类号： G03F1/00 ,  G06K9/22 ,  G06K9/46 ,  G06K9/48 ,  G06T5/00 ,  G06T7/60

CPC分类号： G06K9/4638 ,  G06K9/48 ,  G06T7/0083 ,  G06T2207/20136 ,  G06T2207/20156

摘要： A partial image section is set as including part of a contour line of a particular image area in an original image appearing on a display screen. An image in the partial image section is binarized by referring to a selected threshold level. A boundary of the resulting binary image is detected for extraction of contour data in the partial image section. A plurality of such partial image sections are set successively in a way to partly overlap each other. Contour data (N2,M2) in an overlapping region of two adjacent partial image sections (Ni,Ni-1) are extracted by obtaining a plurality of dividing points (m.sub.0,n.sub.0,m.sub.1,n.sub.1, etc.) dividing, in corresponding proportions, two partial extracted contour lines lying in the overlapping region of adjacent partial image sections, distributing segments linking corresponding dividing points on the two parallel extracted contour lines in ratios corresponding to an order of arrangement of the dividing points, and deriving contour data for the overlapping region from coordinates of these distributing points (i.sub.1, i.sub.2, etc).

摘要翻译： 部分图像部分被设置为包括出现在显示屏幕上的原始图像中的特定图像区域的轮廓线的一部分。 通过参考所选择的阈值水平对部分图像部分中的图像进行二值化。 检测所得到的二值图像的边界，用于提取部分图像部分中的轮廓数据。 多个这样的部分图像部分以相互重叠的方式被连续地设置。 通过获得多个分割点，以相应的比例划分位于相邻部分图像部分的重叠区域中的两个部分提取的轮廓线，将相应的分割点链接在一起的分配段上，提取两个相邻部分图像部分的重叠区域中的轮廓数据 两个部分提取的轮廓线的比例对应于分割点的排列顺序，并且从这些分布点的坐标导出重叠区域的轮廓数据。