Automatic calibration control for color grading apparatus

Details Automatic calibration control for color grading apparatus Automatic calibration control for color grading apparatus

1978-10-30

1981-03-31

Evans, F. L.

Optics: measuring and testing

By shade or color

356407, 356243, G01J 350

Patent

active

042590205

ABSTRACT:
Apparatus for color grading of products such as fruits, vegetables, et cetera, employing a light source for illuminating the product and means for detecting and comparing the reflectance to measure certain product properties. For calibration, a target of known color is moved in front of the light source and the resulting signal is compared with a reference signal to generate a modifying signal. For automatic calibration of the apparatus this modifying signal is stored and thereafter used to adjust all subsequent readout signals.

REFERENCES:
patent: 3680957 (1972-08-01), Fukuda
patent: 3998555 (1976-12-01), Babb
patent: 4057352 (1977-11-01), Babb

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