Television – Monitoring – testing – or measuring – Testing of image reproducer
Patent
1994-08-22
1996-05-14
Groody, James J.
Television
Monitoring, testing, or measuring
Testing of image reproducer
348179, 348649, 266 80, 73 6142, 73 232, H04N 1702
Patent
active
055172377
ABSTRACT:
A video photometric color sensing system is provided for characterizing the color of a homogeneous substance on a real time basis. The sensing system includes a sample port for holding a homogeneous substance and a camera quantifies a color video image of the homogeneous substance and provides as outputs analog voltage signals representative of the amount of red, green and blue in the color video image. A peak detector circuit receives the analog voltage signals representative of the amount of red, green and blue in the color video image and generates peak red, green and blue analog voltage signals and uses these individual voltage values of each component to derive the luminance value from software generated nonadditive matrix. Each of the peak red, green, blue and luminance analog voltage signals are converted to corresponding digital levels and then a processor compares the received red, green, blue and luminance digital levels to red, green, blue and luminance reference levels stored within the processor and indicative of known values of the homogeneous substance to determine the actual concentration of the homogeneous substance.
REFERENCES:
patent: 4379402 (1983-04-01), Harman, III
patent: 5036251 (1991-07-01), Lee
patent: 5182594 (1993-01-01), Hopson
patent: 5298798 (1994-03-01), Furumiya
patent: 5327228 (1994-07-01), Satyanarayana et al.
patent: 5402665 (1995-04-01), Hart et al.
Groody James J.
Koltos E. Philip
Murrell Jeffrey S.
The United States of America as represented by the Secretary of
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