JPH03109487U

JPH03109487U -

Info

Publication number: JPH03109487U
Application number: JP1781390U
Authority: JP
Priority date: 1990-02-22
Filing date: 1990-02-22
Publication date: 1991-11-11

Description

[Brief explanation of drawings]

第１図は本考案による色相抽出単色化回路の一
実施例の構成図、第２図は従来の色相抽出単色化
回路の構成図である。１，２……選択回路、３……第１の乗算器、４
……第２の乗算器、５……第１の加算器、６……
第２の加算器、７……第１の比較器、８……第２
の比較器、９，２０……出力回路、１０，１９…
…ＡＮＤ回路、１１……加算器、１２……逆数回
路、１３，１４，１５，２１……乗算器、１６，
１７，１８……比較器。 FIG. 1 is a block diagram of an embodiment of a hue extraction monochrome circuit according to the present invention, and FIG. 2 is a block diagram of a conventional hue extraction monochrome circuit. 1, 2... Selection circuit, 3... First multiplier, 4
...Second multiplier, 5...First adder, 6...
second adder, 7...first comparator, 8...second
Comparators, 9, 20... Output circuits, 10, 19...
...AND circuit, 11 ... Adder, 12 ... Reciprocal circuit, 13, 14, 15, 21 ... Multiplier, 16,
17, 18... Comparator.

Claims

[Scope of utility model registration request]

In a hue extraction monochromatic circuit that extracts only a predetermined hue component from a color signal that is separated into RGB components and is supplied, and outputs it as a luminance signal to make it monochromatic,
a selection circuit that selects a component signal having an extracted hue that maximizes an RGB ratio, which is a hue component ratio, from any of the RGB component signals and outputs it together with other component signals; a first multiplier that multiplies a first coefficient and outputs a negative signal whose absolute value is substantially equal to the first component signal among the first and second two component signals other than the selected component signal; a second component signal that multiplies the component signal selected by the selection circuit by a second coefficient and outputs a negative signal having substantially the same absolute value as the second component signal;
a first adder that adds and outputs the first component signal and the output of the first multiplier; and a first adder that adds and outputs the output of the second component signal and the second multiplier. a second adder; a first comparator that determines whether the output of the first adder is approximately zero within a predetermined setting range; a second comparator that determines whether or not it is approximately zero within the setting range, and if the determination results of the first and second comparators both indicate approximately zero, the selection circuit selects and an output circuit that outputs a component signal having a maximum RGB ratio, and outputs 0 as a luminance signal of an image signal when at least one of the determination results is outside a predetermined range. Extracting monochromatic circuit.