Image processing apparatus and profile generation method

Active Publication Date: 2012-08-02
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0011]The present invention is made to solve the foregoing problem; an object of the present invention is to provide an image processing apparatus and a profile generation method

Problems solved by technology

However, in the mapping using the focal color as disclosed in Japanese Patent Laid-Open No. 2007-274584, a large change of lightness that is called “lightness jumping” may occur depending on the shape of t

Method used

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  • Image processing apparatus and profile generation method
  • Image processing apparatus and profile generation method
  • Image processing apparatus and profile generation method

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first embodiment

[0026]The first embodiment of the present invention relates to an apparatus and a method that generate a profile for mapping, in a standard color space, the color gamut of an input device to the color gamut of an output device.

(Configuration of Image Processing Apparatus)

[0027]FIG. 3 is a block diagram showing the configuration of an image processing apparatus according to the present embodiment. The image processing apparatus of the present embodiment is realized through the execution of a program by a host computer. In FIG. 3, a CPU 500 performs, according to information data and various programs stored in a ROM 501, various types of control on a RAM 502, an operation portion 503, an image processing portion 504, a monitor 505, an image input device 506 and an image output device 507. Examples of the programs stored in the ROM 501 include a control program, an OS (operating system), an application program, a color conversion processing module and a device driver. An information stora

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Abstract

When a grid point that is the object to be mapped is present in a first division region a color of which has lightness equal to or higher than the lightness at the maximum chroma point in the color gamut and has chroma higher than the chroma at that point, the intersection of a straight line connecting the grid point to the maximum chroma point and an achromatic axis is calculated and a point having lightness equal to or higher than the lightness of the intersection is set as the focal color. Then, the intersection of a straight line connecting the object grid point to the focal color and the boundary of color gamut is set as an output color for the grid point. The output colors are prevented from being separated into color on the high and on the low lightness sides with respect to the maximum chroma point.

Description

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Claims

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Application Information

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Owner CANON KK
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