Pixel correction logic circuit

Details Pixel correction logic circuit Pixel correction logic circuit

1982-02-12

1985-01-01

Martin, John C.

Image analysis

Histogram processing

For setting a threshold

358284, 382 14, 382 50, G06K 936, H04N 140

Patent

active

044919611

ABSTRACT:
Unprocessed video signals from an optical scanner are processed in accordance with a transfer function which adjusts the gain of the unprocessed video to produce processed video which better represents the form of the object scanned. The transfer function is selected from a memory including a plurality of such functions by a signature signal which characterizes the entire scanner system including the optical system, the illumination system and the sensor system. The signature signal is developed from an initial value of signature which is updated by processing with the unprocessed video.

REFERENCES:
patent: 4121196 (1978-10-01), Johnson et al.
patent: 4129853 (1978-12-01), Althouser et al.
patent: 4345314 (1982-08-01), Melamud et al.
patent: 4408343 (1983-10-01), Neill et al.

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