Infrared video camera shading correction device

Details Infrared video camera shading correction device Infrared video camera shading correction device

1988-11-28

1989-11-07

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358163, H04N 533, H04N 514

Patent

active

048795984

ABSTRACT:
An infrared video camera shading correction device which includes an averaging circuit for averaging during a few frames the output of an infrared image sensor to provide an average output, a shading pattern generator for generating a shading pattern similar to that of an optics of the infrared video camera, a multiplier for multiplying the average output by the shading pattern signal to provide a multiplication output, and a subtractor for subtracting the multiplication output from the infrared video signal of the infrared image pickup section for effecting shading correction.

REFERENCES:
patent: 4288817 (1981-09-01), Igel
patent: 4520395 (1985-05-01), Abe
patent: 4524388 (1985-06-01), Abe et al.
patent: 4554583 (1985-11-01), Saitoh et al.
patent: 4618892 (1986-10-01), Kawaguchi

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