Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1982-02-05
1984-08-21
Masinick, Michael A.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 907
Patent
active
044673477
ABSTRACT:
The present invention relates to a color imaging device which suppresses false color signals appearing in an area where the difference of brightnesses is great in the horizontal or vertical direction.
When the correlation between picture elements adjacent in the vertical direction is little and the false signal appears in a boundary part in the vertical direction, the false signal is detected, whereupon a color signal is demodulated by utilizing the correlation between the signals of picture elements in the horizontal direction. On the other hand, when the correlation between picture elements adjacent in the horizontal direction is little and the false signal appears in a boundary part in the horizontal direction, the false signal is detected, whereupon a color signal is demodulated by utilizing the correlation between the signals of picture elements in the vertical direction.
As a result, the moire phenomenon attributed to the false color signals can be conspicuously reduced.
While embodiments of the present invention refer to color imaging devices which employ MOS type solid-state imaging devices, the invention is also applicable to an imaging device which employs CCDs and a color image pickup tube which separates colors by means of a mosaic color filter.
REFERENCES:
patent: 4104679 (1978-08-01), Kitamura
patent: 4157566 (1979-06-01), Nakabe
patent: 4282547 (1981-08-01), Morishita
patent: 4286285 (1981-08-01), Rhodes
Akiyama Toshiyuki
Izumita Morishi
Kudo Koji
Nagahara Shusaku
Ozawa Naoki
Hitachi , Ltd.
Masinick Michael A.
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