JPH0471102U

JPH0471102U -

Info

Publication number: JPH0471102U
Application number: JP11383190U
Authority: JP
Priority date: 1990-10-30
Filing date: 1990-10-30
Publication date: 1992-06-24

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
第２図はウインドウ回路５のウインドウと特徴点
Ａ，Ｂを説明する平面図、第３図は特徴点Ａ，Ｂ
より十字マークの中心を算出することを説明する
平面図である。１……画像入力部、２……十字マーク、３……
２次元カメラ、４……ウインドウ、５……ウイン
ドウ回路、６……画像データ部、７……特徴点抽
出部、１０……中心位置算出部、Ａ，Ｂ……特徴
点、Ｃ……中点、Ｄ……交点。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a plan view illustrating the window of the window circuit 5 and feature points A and B, and FIG. 3 is a plan view illustrating feature points A and B.
FIG. 3 is a plan view illustrating calculating the center of a cross mark. 1... Image input section, 2... Cross mark, 3...
Two-dimensional camera, 4...Window, 5...Window circuit, 6...Image data section, 7...Feature point extraction section, 10...Center position calculation section, A, B...Feature point, C...Medium Point, D...intersection.

Claims

[Scope of utility model registration request]

an image input unit that has a two-dimensional camera that inputs an image of the cross mark, and a window circuit that obtains an image limited to only the tip of the cross mark in the image input by the two-dimensional camera; An image data part to be stored as XY coordinates, a feature point A having a maximum or minimum value of coordinates X that does not touch the window, and a maximum or minimum value of coordinates Y that does not touch the window for each tip of the cross mark. a feature point extraction unit that extracts a feature point B that has a feature point B, and a feature point extracting unit that extracts a feature point B that has a feature point A and a feature point B that are obtained for each tip of the cross mark; A position detecting device for a cross mark, comprising a center position calculation unit that calculates the coordinates of the cross mark using an intersection point as the center of the cross mark.