Image analysis – Histogram processing – For setting a threshold
Patent
1990-02-01
1992-07-21
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
356371, 73163, 194302, G06K 900
Patent
active
051330199
ABSTRACT:
Systems and methods for illuminating an object surface with light at varying angles of incidence and for optically evaluating the object surface for features and defects, etc. are disclosed. In a specific implementation the systems and methods, the target object comprises a coin and the illumination and evaluation techniques are used to accurately objectively evaluate the numismatic quality of the coin and/or identify the coin. Central to the illumination and evaluation techniques is the ability to apply a uniform confined beam of light to the surface of the target object to be imaged. The confined angles of incidence of the beam of light includes a perpendicular component angle of incidence range and a parallel component angle of incidence range relative to the object surface. The component ranges are defined such a light beam illuminates the object surface from a well-defined direction. The direction and the extent of light beam illumination may be varied by redefining one or both of the component angle of incidence ranges. In addition to identifying features and defects of a coin surface, the illumination and evaluation techniques are capable of imaging the surface lustre of the coin.
REFERENCES:
patent: 3349612 (1967-10-01), Sherman
patent: 3728795 (1973-04-01), Von Camber
patent: 4058820 (1977-11-01), Hollen
patent: 4134209 (1979-01-01), Fariss, Jr.
patent: 4191492 (1980-03-01), Mason
patent: 4223986 (1980-09-01), Choate
patent: 4225923 (1980-09-01), Bloemendaal et al.
patent: 4241392 (1980-12-01), Boone
patent: 4288844 (1981-09-01), Fisher et al.
patent: 4309111 (1982-01-01), Sobresky, Sr.
patent: 4392182 (1983-07-01), DiMatteo
patent: 4403294 (1983-09-01), Hamada et al.
patent: 4480895 (1984-11-01), Carson
patent: 4493411 (1985-01-01), Heiman
patent: 4494868 (1952-08-01), Lambeth
patent: 4513441 (1985-04-01), Henshaw
patent: 4529316 (1985-07-01), DiMatteo
patent: 4541011 (1985-09-01), Mayer et al.
patent: 4583861 (1986-04-01), Yamaji et al.
patent: 4617619 (1986-10-01), Gehly
patent: 4682040 (1987-07-01), Hohki et al.
patent: 4706168 (1987-11-01), Weisner
patent: 4750140 (1988-06-01), Asano et al.
patent: 4811040 (1989-03-01), Maxsen
patent: 4899392 (1990-02-01), Merton
patent: 5018867 (1991-05-01), Piironen
American Numismatic Association, "Official A.N.A. Grading Standards for United States Coins", pp. 7-19, Revised Second Edition (1984).
Tracor Northern TN-8500 Image Analysis System brochure entitled "High Performance Image Analysis."
Balcar brochure entitled, "Universal Lighting System."
"Battelle report indicates objective grading possible-Technology exists to eliminate subjectivity," Coin World, vol. 28, issue 1427, Aug. 1987.
Diefenthal James R.
Lenaz, Jr. Emmett J.
Merton Henry A.
Radigan William D.
Sengupta Soumitra
Couso Jose L.
Identigrade
Moore David K.
LandOfFree
Systems and methods for illuminating and evaluating surfaces does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for illuminating and evaluating surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for illuminating and evaluating surfaces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-850815