Apparatus for quantifying video images of light beams

Details Apparatus for quantifying video images of light beams Apparatus for quantifying video images of light beams

1986-10-30

1988-09-27

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 13, 358 96, 382 50, 341200, H04N 514, H04N 700, G06K 938

Patent

active

047745797

ABSTRACT:
The present invention relates to a device which replaces a video image of a light beam with a quantized image, having contours corresponding to preset intensity percentages. The continuous analog video waveform is replaced by a stepped waveform, resulting in contours to appear on the video image. These contours can be preset to appear at the common percentages of the maximum. The most useful contours are at 90%, 50%, 37% (corresponding to 1/e of intensity), 14% (corresponding to 1/e.sup.2 of intensity) and 10%. A normalizing circuit makes the contours independent of light level.

REFERENCES:
patent: 4120589 (1978-10-01), Mima et al.
patent: 4240107 (1980-12-01), Yoshida
patent: 4251802 (1981-02-01), Horna
patent: 4554583 (1985-11-01), Saitoh et al.
patent: 4578715 (1986-03-01), Yamaguchi
patent: 4742554 (1988-05-01), Tsuda

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