Embedded gamut mapping algorithm

• US 7,356,181 B2
• Filed: 09/23/2005
• Issued: 04/08/2008
• Est. Priority Date: 11/15/1999
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kohler, Timothy L., Haikin, John S.
• Primary Examiner(s): SHERALI, ISHRAT I
• Application Number:
  US11/232,921
• Publication Number:
  US 20060018536A1
• Time in Patent Office: 928 Days
• Field of Search: 382162-167, 358/1.9, 358500-540, 345589-604, 715/528
• US Class Current: 382/167
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77
• CPC Class Codes: H04N 1/603 controlled by characteristics of the picture signal generator or the picture reproducer
• CPC Class Codes: H04N 1/6058 Reduction of colour to a range of reproducible colours, e.g. to ink- reproducible colour gamut

Abstract

A color management module which accepts input color image data and transforms the input color image data into output color image data based on information contained in at least one color profile, wherein the color management module includes an interface to an externally provided, pluggable gamut mapping module which is accessed by the color management module to map the input color image data from an input color gamut into an output color gamut.

Claims

1. A color management apparatus which transforms input color image data into output color image data based on information contained in at least one color profile, said color management apparatus comprising:

an interface for externally receiving a gamut mapping condition;

a first transformer for transforming input color image data from input device-dependent space into device-independent color space;

a mapper for mapping the color image data represented in the device-independent color space into a gamut boundary of the output device by using said gamut mapping condition; and

a second transformer for transforming the gamut mapped color image data from the device-independent color space into an output device-dependent color space by using the device color profile,

wherein the device independent color space is viewing condition independent, and

wherein said first transformer uses a color appearance model.

2. A color management apparatus according to claim 1, wherein said gamut mapping condition is a gamut mapping algorithm.

3. A color management method which transforms input color image data into output color image data based on information contained in at least one color profile, said color management method comprising the steps of:

defining an interface for externally receiving a gamut mapping condition;

transforming input color image data from input device-dependent space into device-independent color space;

mapping the color image data represented in the device-independent color space into a gamut boundary of the output device by using said gamut mapping condition; and

transforming the gamut mapped color image data from the device-independent color space into an output device-dependent color space by using the device color profile,

wherein the device independent color space is viewing condition independent, and

wherein said transforming step uses a color appearance model.

4. A color management method according to claim 3, wherein said gamut mapping condition is a gamut mapping algorithm.