Color image outputting system for an image processing apparatus

• US 5,343,312 A
• Filed: 06/09/1992
• Issued: 08/30/1994
• Est. Priority Date: 06/14/1989
• Status: Expired due to Fees

• Current Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Hibi, Yoshiharu, Terada, Yoshihiro
• Primary Examiner(s): Coles, Sr., Edward L.
• Assistant Examiner(s): Grant, II, Jerome
• Application Number:
  US07/895,814
• Time in Patent Office: 812 Days
• Field of Search: 358/80, 358/75, 358/426, 358/456, 358/401, 358/11, 358/12, 358/133, 358/520, 358/523, 358/524, 358/529, 358/530, 348/35, 3/155, 3/153
• US Class Current: 358/520
• CPC Class Codes: H04N 1/40012 Conversion of colour to monochrome
• CPC Class Codes: H04N 1/4072 dependent on the contents of the original
• CPC Class Codes: H04N 1/6022 Generating a fourth subtractive colour signal, e.g. under colour removal, black masking
• CPC Class Codes: H04N 1/6027 Correction or control of colour gradation or colour contrast H04N1/6058 takes precedence

Abstract

A mono color image outputting system for an image processing apparatus applies a color correction separated color signals in the input section converts them into recording signals of color material, before outputting a color image. In the mono color outputting system, a gradation property of value data in the input section is linearly compressed to correspond to a gradation property of value data in the output section.

Claims

1. An image processing apparatus having a monochrome image producing system, comprising:

an input section for receiving an input signal;

means for converting said input signal into a first luminous signal;

means for linearly compressing said first luminous signal and generating a second luminous signal;

means for producing a recording signal based on said second luminous signal and a specified color signal; and

output means for forming a monochrome image on a paper in accordance with the recording signal and the specified color signal.

2. An image processing apparatus having a monochrome image producing system, comprising:

an input section for receiving an input signal;

means for converting said input signal into a first luminous signal, said converting means including means for generating an equivalent neutral density signal from the input signal;

means for linearly compressing said first luminous signal and generating a second luminous signal; and

means for producing a recording signal based on said second luminous signal and a specified color signal.

3. An image processing apparatus having a monochrome image producing system, comprising:

an input section for receiving an input signal;

means for converting said input signal into a first luminous signal;

means for linearly compressing said first luminous signal and generating a second luminous signal;

means for producing a recording signal based on said second luminous signal and a specified color signal; and

output means for forming a monochrome image on a paper in accordance with the recording signal and the specified color signal, the linearly compressing means matching a luminous range of the input section to a luminous range of the output means.