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:
May. 22, 2018
Filed:
Dec. 28, 2015
Hrl Laboratories, Llc, Malibu, CA (US);
HRL Laboratories, LLC, Malibu, CA (US);
Abstract
Described is a system for door detection for use with an unmanned aerial vehicle (UAV). The system receive a video input image from a single monocular camera. Edge points are detected in the video, with the edge points connected to form long edge lines. Orientations of the long edge lines are determined, such that long edge lines having a substantially vertical orientation are designated as initial door line candidates and long edge lines having a non-vertical, non-horizontal orientation are designated for use in detecting a vanishing point. A vanishing point is then detected in the video frame. Thereafter, intensity profile and line properties of the door line candidates are calculated. Finally, it is verified if the door line candidates are real world door lines and, if so, an area between the real world door lines is designated as an open door.