Color video signal processing device for enhancing at least one

Details Color video signal processing device for enhancing at least one Color video signal processing device for enhancing at least one

1984-04-10

1986-12-16

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 29, 358 44, H04N 9083, H04N 907, H04N 973

Patent

active

046301070

ABSTRACT:
A color video signal processing device for a color image pickup apparatus which allows the saturation of a particular primary color to be enhanced with a good S/N ratio and without affecting the other colors. The image pickup apparatus generates a multiplex color signal which is made up of a low frequency range signal containing all the three primary color signal components and a high frequency range carrier signal modulated with first and second primary color signal components, which are predetermined by the colors of a color stripe filter installed in the image pickup apparatus, and in turn these signals and processed and transformed generally to three primary color video signals and a luminance signal. The low frequency range and high frequency range signals are separated from the color multiplex signal. The separated high frequency range signal contains a fundamental component and a harmonic component. The fundamental component is subjected to envelope detection. The signal level of at least one of the separated low frequency range signal and the envelope-detected signal is adjusted such that a third primary color signal component absent in the high frequency range signal is introduced into a difference signal produced by subtraction of the envelope-detected signal and the low frequency range signal.

REFERENCES:
patent: 3378633 (1968-04-01), Macovski
patent: 3808357 (1974-04-01), Nakagaki et al.
patent: 3846579 (1974-11-01), Takanashi et al.
patent: 4041528 (1977-08-01), Miyoshi et al.

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