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Colour processing method, colour processing appts. and storage medium

A color processing and color technology, applied in image data processing, character and pattern recognition, instruments, etc., can solve problems such as weakening correction and reducing the amount of color adjustment.

Inactive Publication Date: 2004-08-11
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the amount of color adjustment is reduced in consideration of these circumstances, there is a problem that, for example, in the case of a generally blue sky, the correction becomes weak, so that optimal reproduction cannot be performed well.

Method used

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  • Colour processing method, colour processing appts. and storage medium
  • Colour processing method, colour processing appts. and storage medium
  • Colour processing method, colour processing appts. and storage medium

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Embodiment Construction

[0025] figure 1 is a block diagram showing the first embodiment of the present invention. exist figure 1 Among them, reference numeral 11 denotes a representative color calculation section; 12, a color adjustment distance calculation section; and 13, a reproduced color calculation section. The representative color calculation unit 11 calculates a color representing an area targeted for color adjustment based on an input image, and regards this color as a representative color. The calculation of the representative color can be performed using known techniques related to image region recognition. Various methods can be used. For example, a color range is determined in advance based on hue or the like so that a representative color is calculated based on an average value of pixels within the color range.

[0026] The color adjustment distance calculation section 12 calculates the Euclidean distance on the color space between the representative color calculated by the represen...

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Abstract

A representative color calculation section calculates a representative color representing a region, which is a subject of color adjustment in an input image. A color adjustment distance calculation section calculates, as a color adjustment distance, a Euclidean distance on a color space between the representative color calculated by the representative color calculation section and a given target color. A reproduction color calculation section calculates a reproduction color expressing the adjusted color of the region, which is the subject of the color adjustment, in such a manner that the colors of the region is adjusted on the basis of the color adjustment distance so that the colors of the region is adjusted little when the color adjustment distance is long, but the color of the region is brought near to the target color when the color adjustment distance is short.

Description

technical field [0001] The present invention relates to a technique for optimally adjusting the color of a specific area in a color image. Specifically, the present invention relates to a method for adjusting the reproduced color after adjustment according to the memory color to be adjusted in a natural image including a memory color that is memorized as an image impression, such as skin color, sky blue, or grass green. A technique for making a decision and reproducing the reproduced color in the area of ​​the memory color in the natural image. Background technique [0002] When it is necessary to automatically adjust the natural image containing the area of ​​the memory color memorized by people, the following method is generally adopted, that is: setting the target color of the memory color as the adjustment object, so that the area of ​​the memory color in the natural image is adjusted to target color. For example, in the memory color adjustment method described in JP-A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/40G06T5/00H04N1/60H04N1/62
CPCH04N1/62H04N1/628
Inventor 佐佐木信
Owner FUJIFILM BUSINESS INNOVATION CORP
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