The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2004
Filed:
Feb. 27, 2002
Shin-ichi Oku, Ohtsu, JP;
Yoshinori Tatsumi, Ohtsu, JP;
Akihiko Hayashi, Ohtsu, JP;
Maki Takeguchi, Ohtsu, JP;
Optex Co., Ltd., Shiga-ken, JP;
Abstract
Cameras take images of an image space around a door. A distance calculation unit calculates the distance to an object in the taken images. A coordinate transformation unit detects the three-dimensional position of the object in the image space. The image space covered by the cameras is divided into a plurality of voxels. Some of these voxels are optionally set as constituents of the detection area. A judgement unit judges whether the detected three-dimensional position of the object locates within or outside the detection area. If the object is present within the detection area, an output unit produces an object detection signal, so that the door is allowed to open.