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Designated color layer extracting device and method

A technology for extracting equipment and color layers, applied in image data processing, instruments, calculations, etc., can solve problems such as difficulty in separating the target color layer, and achieve the effect of simple input

Inactive Publication Date: 2013-01-23
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among the above methods, some need to know in advance how many colors and each color attribute or color value are contained in the color image, which may not meet these conditions in actual processing; one common point of the above three types of methods is that the extracted target color layers are all binary Value images, when dealing with overlapping regions of different colors (color coverage), it is difficult to accurately separate the target color layer

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  • Designated color layer extracting device and method
  • Designated color layer extracting device and method
  • Designated color layer extracting device and method

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Embodiment Construction

[0041]Embodiments of the present invention will be described below with reference to the drawings. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.

[0042] figure 1 is a block diagram showing a designated color layer extraction device 100 for finally extracting a designated color layer (ie, a target color layer) from a color image according to an embodiment of the present invention.

[0043] Such as figure 1 As shown, the designated color layer device 100 includes a background color estimator 101 , a target color estimator 102 , a vector axis setting unit 103 , an intensity layer extractor 104 , a color difference layer extractor 105 and a compounder 106 . In this paper, a color document image is used as an example of a color image for description, but it should be clear tha...

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Abstract

The invention relates to a designated color layer extracting device and a method. The designated color layer extracting device is used for extracting target color layers from a color image and comprises a vector axis setting unit, an intensity layer extractor, a color difference layer extractor and a recombiner, wherein the vector axis setting unit unitizes the vector from a background color center to a target color center to from a vector axis; the intensity layer extractor computes an intensity layer image without influence from background colors by the vector axis; the color difference layer extractor computes a color difference layer image without influence from other colors except the background colors and the target colors; and the recombiner combines the intensity layer image and the color difference layer image, uniformizes the combination result and outputs a gray level image representing the intensity of the target colors.

Description

technical field [0001] The invention relates to a specified color layer extraction technology of a color image, in particular to a specified color layer extraction method and device for a color image. Background technique [0002] With the continuous development of color image processing technology, its application fields are becoming wider and wider, such as industry, commerce, and medicine. For color images, especially color document images, areas of different colors often represent different types of objects or content. Extracting objects or content with specific colors has become an important image preprocessing technology. [0003] Color extraction techniques in color images can be classified into three types. The first type determines whether the pixel is a specified color layer according to the R, G, and B values ​​of the pixel. For example, literature (N. Sherkat, T. Allen, and S. Wong. Use of color for hand-filled form analysis and recognition. Pattern Analysis an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/40G06T7/90
Inventor 郑大念孙俊直井聪堀田悦伸
Owner FUJITSU LTD