CCD imager video output defect compensation

Details CCD imager video output defect compensation CCD imager video output defect compensation

1984-12-03

1988-03-29

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821317, 358 44, H04N 907

Patent

active

047347740

ABSTRACT:
Erroneous data in the video pulse output string of a CCD imager, caused by defective cells in the imager, is detected by comparison with adjacent data in the string and corrected by replacement with adjacent data. CCD video output is delayed by one clock cycle, then compared to the real time video output while both signals are still on the chip. If the delayed pulse is the same or greater magnitude as the real time pulse, that pulse goes on as part of the video output. If the delayed pulse is less than the real time pulse by a defined amount or more, then the real time pulse is replaced in the output by a copy of the following real time data pulse.

REFERENCES:
patent: 3869567 (1975-03-01), Covington
patent: 3904818 (1975-09-01), Kovac
patent: 4175268 (1979-11-01), Ochi et al.
patent: 4193093 (1980-03-01), St. Clair
patent: 4232340 (1980-11-01), Fuhrer
patent: 4253120 (1981-02-01), Levine

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