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:
Jan. 19, 2010
Filed:
Feb. 11, 2008
Charles H. Mammen, Beverly, MA (US);
Robert G. Benson, New Ipswich, NH (US);
Charles H. Mammen, Beverly, MA (US);
Robert G. Benson, New Ipswich, NH (US);
FLIR Systems, Inc., Wilsonville, OR (US);
Abstract
A portable thermography camera system () renders a video image of a survey scene over a narrow spectral bandwidth corresponding with an absorption band of a gas to be detected in the video image. The camera system forms a scene image onto a focal plane array () and generates a corrected image signal () corresponding with irradiance values at a plurality of locations of the scene image. The camera system further generates a temporally filtered image signal () corresponding with a temporal characteristics of the image signal () over a selected number of prior image frames. A difference block () reduces the temporally filtered image signal () by a scaling factor and produces a difference image by subtracting the scaled temporally filtered image signal from the corrected image signal (). The displayed difference signal improves the visibility of the gas to be detected.