Image processing apparatus and method that perform color matching using detected uniformity
AssigneeCanon Kabushiki Kaisha
InventorManabu Ohga
Life of this patent
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Abstract
When one viewing condition parameter is applied to all pixels, a visual effect between a single color and a background expressed on a rasterized image cannot be reflected on a color matching result. To prevent this, when color matching using a human color appearance model is to be performed, the distance between an image and a viewer and the resolution of the image are input. On the basis of the input distance and resolution, a stimulus region, adjacent region, and background region based on a plurality of field angles (e.g., 2°, 4°, and 10°) for a pixel of interest on the image are defined, thereby determining a viewing condition parameter and performing color matching.
Claims9
An image processing apparatus for performing color matching, comprising:
- a detector, arranged to detect uniformity of a region in an image neighboring a pixel of interest;
- a setting section, arranged to set a viewing condition parameter of a color appearance model for the pixel of interest based on the detected uniformity;
- and
- a color matching section, arranged to perform the color matching using the color appearance model on the pixel of interest in accordance with the set viewing condition parameter.
A method of performing color matching, the method comprising using a processor to perform the steps of:
- detecting uniformity of a region of an image neighboring a pixel of interest;
- setting a viewing condition parameter of a color appearance model for the pixel of interest based on the detected uniformity;
- and
- performing the color matching using the color appearance model on the pixel of interest in accordance with the set viewing condition parameter.
A computer-readable storage medium storing a computer-executable program for causing a computer to perform a method of performing color matching, the method comprising the steps of:
- detecting uniformity of a region of an image neighboring a pixel of interest;
- setting a viewing condition parameter of a color appearance model for the pixel of interest based on the detected uniformity;
- and
- performing the color matching using the color appearance model on the pixel of interest in accordance with the set viewing condition parameter.
Dependencies are inferred from the claim text.