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:
Nov. 24, 2009
Filed:
Nov. 05, 2003
Sanjay Nichani, San Diego, CA (US);
Cyril C. Marrion, Jr., Acton, MA (US);
Robert Wolff, Sherborn, MA (US);
David Shatz, Noodham, MA (US);
Raymond A. Fix, Natick, MA (US);
Gene Halbrooks, Leominster, MA (US);
Sanjay Nichani, San Diego, CA (US);
Cyril C. Marrion, Jr., Acton, MA (US);
Robert Wolff, Sherborn, MA (US);
David Shatz, Noodham, MA (US);
Raymond A. Fix, Natick, MA (US);
Gene Halbrooks, Leominster, MA (US);
Cognex Technology and Investment Corporation, Mt. View, CA (US);
Abstract
Enhanced portal security is provided through stereoscopy, including a stereo door sensor for detecting and optionally preventing access violations, such as piggybacking and tailgating. A portal security system can include a 3D imaging system that generates a target volume from plural 2D images of a field of view about a portal; and a processor that detects and tracks people candidates moving through the target volume to detect a portal access event.