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:
Mar. 12, 2013
Filed:
Jul. 17, 2007
Edward N. Pugh, Jr., Philadelphia, PA (US);
Nader Engheta, Berwyn, PA (US);
Shih-schon Lin, San Francisco, CA (US);
Konstantin Yemelyanov, Philadelphia, PA (US);
Edward N. Pugh, Jr., Philadelphia, PA (US);
Nader Engheta, Berwyn, PA (US);
Shih-Schon Lin, San Francisco, CA (US);
Konstantin Yemelyanov, Philadelphia, PA (US);
The Trustees Of The University Of Pennsylvania, Philadelphia, PA (US);
Abstract
Shadow is an inseparable aspect of all natural scenes. When there are multiple light sources or multiple reflections several different shadows may overlap at the same location and create complicated patterns. Shadows are a potentially good source of information about a scene if the shadow regions can be properly identified and segmented. However, shadow region identification and segmentation is a difficult task and improperly identified shadows often interfere with machine vision tasks like object recognition and tracking. A shadow separation and contrast enhancement method based on the polarization of light is provided. Polarization information of scenes is captured by a polarization-sensitive camera and the scenes are processed to effectively separate shadows from different light sources.