Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-06-11
1982-08-03
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358163, H04N 530, H04N 521
Patent
active
043430210
ABSTRACT:
A method and apparatus for compensating for sensitivity variations in image sensors. The sensing surface of an image sensor is arbitrarily divided into a plurality of detection elements. A field of uniform brightness is presented to the image sensor and the video signal from each detection element is multiplied by a corresponding correction value. The altered video signal is compared to a reference and the corresponding correction value is either incremented or decremented so that the altered video signal approaches the reference. During operation, the video data received from each detection element is multiplied by the corresponding correction value to produce corrected video data.
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Poetsch, "A Continuous Motion Color Film Telecine using CCD Line", Dec. 78 SMPTE Journal, pp. 815-820.
Childs, "An Experimental Telecine Using a Line-Array CCD Sensor", Apr. 78, SMPTE Journal, pp. 209-213.
Mengers, "Low Contrast Imaging", Oct. 78, Electro-Optical Systems Designs, pp. 20-26.
Alberding Gilbert E.
Ball Corporation
Masinick Michael A.
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