Color emphasis circuit

Details Color emphasis circuit Color emphasis circuit

1986-12-01

1988-04-12

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 98, H04N 9535

Patent

active

047378425

ABSTRACT:
A color emphasis circuit in a color endoscope includes a color signal modulator for modulating color signals corresponding to a color image, a color signal averager for obtaining an averaged value by averaging the color signals for every color image, an averaged color signal modulator for modulating the averaged color signals, and a hue difference detector for detecting a hue difference between the modulated color signal output from said color signal modulator and the modulated averaged color signal output from said averaged color signal modulator. Further, a hue difference changer is provided for widening the detected hue difference at least near the averaged value so as to change the hue difference. A phase shifter is also provided for shifting phases of the modulated color signals by the changed hue difference; additionally, a demodulator is provided for demodulating the phase shifted modulated color signals to output color emphasized color signals for display.

REFERENCES:
patent: 4498097 (1985-02-01), Fujimoto
patent: 4622584 (1986-11-01), Nagasaki et al.

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