キーワード:多重方向、交差形状、一撃的アルゴリズム、局所微分情報、3次元物体投影像
It is important to analyze the projected image for interpreting 3D objects. To do this, it is necessary to analyze junctions as Y-junctions and arrow-junctions which are composed of multiple edges. We have already introduced the one-shot algorithm for detecting L-, T- and X-junctions; this algorithm investigates two criteria by using local image derivatives. Now, to analyze junctions on the projected image, we propose a one-shot algorithm able to detect Y-junctions, arrow-, K-, and Psi-junctions.
Keyword: multiple orientations, junctions, one-shot algorithm, image derivatives, the projected image of 3D objects