Position detection apparatus

Details Position detection apparatus Position detection apparatus

1995-02-22

1999-07-27

Lee, Thomas D.

Image analysis

Image transformation or preprocessing

Measuring image properties

382145, 382152, G06K 900, G06K 936

Patent

active

059304065

ABSTRACT:
A position detection apparatus for detecting a position of an object includes a video image producer which produces a video image signal representing the object image. The video image signal is divided into first and second level portions by an edge point. An edge point detector detects the edge point where said level difference is greater than a threshold level. A window filter is provided to increase this level difference to a level greater than a threshold so that the edge point detector can detect the edge point even when the level difference is smaller than the threshold level. A shape detector detects the position of the object based on thus detected edge point.

REFERENCES:
patent: 4823394 (1989-04-01), Berkin et al.
patent: 5040225 (1991-08-01), Gouge
"Optics" Francis Weston Sears, 3rd ed. Addison-Wesley (Apr. 1956) pp. 331-332, 334-335.

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