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DIAGRAM FEATURE EXTRACTION METHOD, DIAGRAM SEARCH METHOD, MOVEMENT TRACKING METHOD, DIAGRAM FEATURE EXTRACTION DEVICE, DIAGRAM SEARCH DEVICE AND MOVEMENT TRACKING DEVICE
DIAGRAM FEATURE EXTRACTION METHOD, DIAGRAM SEARCH METHOD, MOVEMENT TRACKING METHOD, DIAGRAM FEATURE EXTRACTION DEVICE, DIAGRAM SEARCH DEVICE AND MOVEMENT TRACKING DEVICE
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机译：图特征提取方法，图搜索方法，运动跟踪方法，图特征提取设备，图搜索设备和运动跟踪设备
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摘要
PROBLEM TO BE SOLVED: To extract the same feature when enlarged/reduced/rotated diagrams are the same type, and to apply this invention even to any diagram other than a circular-arc.;SOLUTION: A search area (F) is set on an edge image (E) to be searched, and as for all pixels (g) on an edge in the search area (F), an angle θ made by the tangent or normal of an edge with respect to a reference segment (Q) connecting the pixel (g) with a reference point (O) of the search area (F) is calculated, and when the length of the reference segment (Q) is defined as r, and a degree adjustment coefficient is defined as A, a feature histogram is created by counting a degree A/r about the angel θ, and the feature histogram is defined as the diagram feature of the edge. Thus, it is possible to apply this invention even to any diagram other than a circular arc, and to extract the same feature when enlarged/reduced/rotated graphics are the same type.;COPYRIGHT: (C)2014,JPO&INPIT
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