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:
Jul. 29, 2014
Filed:
Sep. 07, 2012
Applicants:
Kuntal Sengupta, Winchester, MA (US);
Robert Calder, Burlington, MA (US);
Inventors:
Kuntal Sengupta, Winchester, MA (US);
Robert Calder, Burlington, MA (US);
Assignee:
Imprivata, Inc., Lexington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A face is detected within a camera's field despite inadequate illumination. In various embodiments, multiple images of the inadequately illuminated field of view are obtained and summed into a composite image. The composite image is tone-mapped based on a facial lighting model, and a bounded group of pixels in the tone-mapped image having a lighting distribution indicative of a face is identified. Facial features are resolved within the bounded group of pixels.