Radiant energy – Invisible radiant energy responsive electric signalling
Reexamination Certificate
2006-07-11
2006-07-11
Hannaher, Constantine (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Reexamination Certificate
active
07075080
ABSTRACT:
Output value signals from radiometer or receiver channels are normalized to achieve a flat field response when creating a millimeter wave image. A normalizing factor is applied to the output value signals from each channel, and the normalizing factor accommodates drift in offset of the output value signals on a scan-by-scan basis. The normalizing factor is based on each channel observing a different mean scan brightness temperature from a portion of the scene than the mean brightness temperature of the entire scene. The normalizing factor is obtained by solving a system of simultaneous equations in which normalizing factors from all of the channels are related to one another, preferably by a consistency condition where the mean scan temperature of each channel is equal to an average of the intensities of those image pixels to which the output value signals from that channel contributes.
REFERENCES:
patent: 3784899 (1974-01-01), Chalfin
patent: 3946385 (1976-03-01), Ewen
patent: 3975736 (1976-08-01), Ewen et al.
patent: 4041494 (1977-08-01), Ewen et al.
patent: 4122344 (1978-10-01), Lettington et al.
patent: 4413878 (1983-11-01), Lettington
patent: 4733072 (1988-03-01), Lettington
patent: 4901084 (1990-02-01), Huguenin et al.
patent: 4910523 (1990-03-01), Huguenin et al.
patent: 4940986 (1990-07-01), Huguenin
patent: 5047783 (1991-09-01), Hugenin
patent: 5073782 (1991-12-01), Hugenin et al.
patent: 5170169 (1992-12-01), Stephan
patent: 5202692 (1993-04-01), Hugenin et al.
patent: 5227800 (1993-07-01), Huguenin et al.
patent: 5455589 (1995-10-01), Hugenin et al.
patent: 5745082 (1998-04-01), Alder
patent: 5760397 (1998-06-01), Hugenin et al.
patent: 5789622 (1998-08-01), Quon et al.
patent: 5828344 (1998-10-01), Alder et al.
patent: 6154174 (2000-11-01), Snider et al.
patent: 6259414 (2001-07-01), Lettington
patent: 6274869 (2001-08-01), Butler
patent: 6353224 (2002-03-01), Sinclair et al.
Hugenin, et al.,Contraband Detection Through Clothing By Means of Millimeter-Wave Imaging, SPIE—The International Society for Optical Engineering, Underground and Obscured Object Imaging and Detection, vol. 1942, Apr. 15-16, 1993, pp. 117-128.
G. Richard Hugenin,The Detection of Concealed Weapons, Explosives and Other Contraband with Passive Millimeter Wave Imaging Cameras, Sep. 1997, pp. 1-15.
Millitech, Microwaves & RF Brochure, Jul. 1992.
Stephen, et al.,Quasioptical Millimeter-Wave Hybrid and Monlithic PIN Diode Switches, IEEE Transactions on Microwave Theory and Techniques, vol. 41, No. 10, Oct. 1993, pp. 1791-1798.
Lettington, et al.,Nonuniformity Correction and Restoration of Passive Millimeter-Wave Images, Optical Engineering, vol. 40, No. 2, Feb. 2001, pp. 258-274.
Gleed, et al.,Operational Issue for Passive Millimeter Wave Imaging Systems, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology, vol. 3064, Apr. 21-22, 1997, pp. 23.33.
Hugenin,Millimeter-Wave Video Rate Imagers, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology, vol. 3064, Apr. 21-22, 1997, pp. 34.45.
Pergande, et al.,Concealed Weapons Detection Sensor and Signal Processing Demonstration, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology, vol. 3064, Apr. 21-22, 1997, pp. 46-53.
Salmon, et al.,Absolute Temperature Stability of Passive Imaging Radiometers, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology, vol. 3064, Apr. 21-22, 1997, pp. 110-120.
Lettington, et al.,A New High-speed Method for Super-Resolving Passive Millimeter-wave Images, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology, vol. 3064, Apr. 21-22, 1997, pp. 218-226.
Anderton, et al.,Real Time Passive MM-wave Imaging, SPIE The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology II, vol. 3378, Apr. 13, 1998, pp. 27-33.
Lettington, et al.,Nonuniformity Correction and Restoration of Passive MM-wave Images, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology III, vol. 3703, Apr. 7, 1999, pp. 167-174.
Gao, et al.,Optimal Dithering of Focal Plan Arrays in Passive Millimeter-Wave Imaging, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology IV, vol. 4032, Apr. 26, 2000, pp. 124-133.
Lettington, et al.,Restoration Techniques for Millimeter-Wave Images, SPIE—The International Society for Optical Engineering, Passive Millimeter-Wave Imaging Technology V, vol. 4373, Apr. 19, 2001, pp. 94-104.
Brown Raysman Millstein Felder & Steiner
Hannaher Constantine
Millivision Technologies
LandOfFree
Offset drift compensating flat fielding method and camera... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Offset drift compensating flat fielding method and camera..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Offset drift compensating flat fielding method and camera... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3581809