Title:
【発明の名称】色信号変換方法
Document Type and Number:
Japanese Patent JP3372710
Kind Code:
B2
Abstract:
PURPOSE: To convert a color separation signal at a high speed by obtaining a bit slice signal, obtaining a function at a closest point, obtaining a weight function, obtaining each accumulated value and adding the accumulated values so as to obtain a signal value of a color separation signal group. CONSTITUTION: A function (f) outputted from a grating point function lookup table 50 and a weight W outputted from a weight generator 66 are multiplied by a multiplier 60 and the product is given to an adder 62. An output W.f from the adder 62 is latched by a register 64 and fed back to the adder 62. Then the adder 62 and the register 64 act like a product sum arithmetic section, which results in outputting an accumulated value ΣW.f. 5 kinds of bit slice signals Sbit outputted from a low-order bit signal register 30 are subject to product sum arithmetic operation for five times, then the output ΣW.f of the register 64 is a signal representing the sum of the weight functions. As a result the output ΣW.f is a converted output color separation signal SB.
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Inventors:
Kunio Ikuta
Application Number:
JP15223895A
Publication Date:
February 04, 2003
Filing Date:
May 25, 1995
Export Citation:
Assignee:
Dainippon Screen Mfg. Co., Ltd.
International Classes:
B41J2/21; B41J2/525; G03F3/08; G03G15/01; G06T1/00; H04N1/46; H04N1/60; (IPC1-7): H04N1/60; B41J2/21; B41J2/525; G03F3/08; G03G15/01; G06T1/00; H04N1/46
Domestic Patent References:
| JP5110840A | ||||
| JP357376A | ||||
| JP2187374A | ||||
| JP2226868A | ||||
| JP59210770A | ||||
| JP8237500A |
Attorney, Agent or Firm:
Takao Igarashi (3 outside)