Television – Image signal processing circuitry specific to television – Hue control
Patent
1996-06-14
1998-06-09
Lee, Richard
Television
Image signal processing circuitry specific to television
Hue control
382167, H04N 964
Patent
active
057643083
ABSTRACT:
A method of adjusting hue in color video signals partitions the region of all available hues into subregions in accordance with the signs of U and V components of input color video signals, which U and V signals are respectively proportional to blue-minus-luminance and red-minus luminance color-difference signals. The hue in each subregion is adjusted independently of the hues in the other subregions. Within each subregion, each of the U and V components of the input color video signals that fall therein is gain-adjusted by prescribed factors according to the subregion. A hue adjustment device determines from the signs U and V components of input color video signals which of the subregions they fall into, and adjusts the hue in each subregion to facilitate more accurate hue adjustment.
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patent: 4679072 (1987-07-01), Takayama
patent: 5436673 (1995-07-01), Bachmann et al.
patent: 5555031 (1996-09-01), Van Rooij
patent: 5563666 (1996-10-01), Suzuki
patent: 5619280 (1997-04-01), Yamashita et al.
patent: 5691779 (1997-11-01), Yamashita et al.
Lee Richard
Limberg Allen LeRoy
Samsung Electronics Co,. Ltd.
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