Bi-directional reflectance distribution function...

Details Bi-directional reflectance distribution function... Bi-directional reflectance distribution function...

2005-07-26

2005-07-26

Hannaher, Constantine (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

06921898

ABSTRACT:
Thermal images of an object are produced outdoors so as to be significantly differentiated temporally and/or geometrically and be inclusive of natural background such as would be illuminated by sunlight. A calibration of the thermal imager (e.g., radiometer) against theoretical blackbody radiation is effected using measured incident radiation, resulting in a calculated pixel intensity. A system transfer function calculation of the pixel intensity is effected, resulting in a radiance. A matrix inversion calculation of all of the radiances considered together is effected, resulting in a bi-directional reflectance distribution function (BRDF). Advantageously, the BRDF is determined from the target in a direct but mathematically-enhanced manner, thereby making economic use of natural illumination and obviating the need for modelling, simulating or reconstructing the target.

REFERENCES:
patent: 3515462 (1970-06-01), Tomokazu et al.
patent: 4466748 (1984-08-01), Needham
patent: 4611929 (1986-09-01), Holyer
patent: 4806018 (1989-02-01), Falk
patent: 5315513 (1994-05-01), Abreu et al.
patent: 5637873 (1997-06-01), Davis et al.
patent: 5790188 (1998-08-01), Sun
patent: 5884226 (1999-03-01), Anderson et al.
P.K. Acharya, A. Berk, G.P. Anderson, N.F. Larsen, S-Chee Tsay and K.H. Stamnes, “MODTRAN4: Multiple Scattering and Bi-Directional Reflectance Distribution Function (BRDF) Upgrades to MODTRAN,”Society of Photo-Optical Instrumentation Engineers(SPIE)Proceedings, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research III, held Jul. 1999, Allen M. Larar, Ed., Oct. 1999, vol, 3756, pp 354-362.
Bruce W. Ball, “SYNSEA Code for Generating Synthetic IR Imagery of Sea,”Society of Photo-Optical Instrumentation Engineers(SPIE)Proceedings, Characterization, Propagation, and Simulation of Sources and Backgrounds II, held Apr. 20, 1992, Orlando, Florida, Dieter Clement et al., Eds., Sep. 1992, vol. 1687, pp 289-298.
Reiner, Irving,Introduction to Matrix Theory and Linear Algebra, Holt Rinehart Winston, New York, 1971, entire book.

Affiliated with

Also associated with

Rating

Bi-directional reflectance distribution function... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bi-directional reflectance distribution function..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bi-directional reflectance distribution function... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3431585