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A Color Image Grayscale Method

A color image and grayscale technology, applied in the field of information processing, to achieve the effect of improving conversion speed, reducing algorithm difficulty, and solving repeated calculation problems

Active Publication Date: 2019-04-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The purpose of the present invention is to provide a color image grayscale method to overcome the problems in the prior art. The present invention solves the problem of repeated calculations in repeated image color conversion, improves the conversion speed, and reduces the image data by 2 / 3

Method used

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  • A Color Image Grayscale Method
  • A Color Image Grayscale Method
  • A Color Image Grayscale Method

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0053] see figure 1 , assuming that for some color images with limited colors, if the image color is relatively small, the color is relatively single, the color depth changes, and the color brightness changes little, you can consider using less data to represent the color and a faster conversion method for grayscale conversion. That is, the color is analyzed first, and then the analysis result is applied to grayscale conversion. The steps of the color image grayscale algorithm based on color analysis are:

[0054] 1. Segment the color image A, record the intermediate results, and segment different colors;

[0055] 2. Combine the segmentation results to expand the intermediate results;

[0056] 3. Use different numbers to represent different color ranges. The numbers represent colors and can be regarded as a gray value, which can be used in color and gray image proc...

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Abstract

The invention discloses a color image grayscale method, 1) performing color analysis on the color image A, and classifying the color of the image A to obtain several color values; 2) expanding the classified color values ​​and converting them into data, and using Different data represent different color ranges; 3) For the color image B with the same shape and color as the color image A, directly apply the above data for grayscale conversion to obtain the corresponding grayscale image B. The invention solves the problem of repeated calculation in the repeated image color conversion, improves the conversion speed, and reduces the image data by 2 / 3.

Description

technical field [0001] The invention belongs to the field of information processing, and in particular relates to a method for graying a color image. Background technique [0002] A large number of color images in daily life bring visual enjoyment to people, so people's requirements for color images are getting higher and higher, and color images are widely used, such as advertisements and packaging materials. [0003] At present, in the image representation, it is mainly divided into grayscale image and color image. A grayscale image is represented by one byte, and its value ranges from 0 to 255. A color image is represented by three bytes, and the color of each pixel is divided into three components: R, G, and B, and each component is 0 --255, such a pixel can have 255*255*255=16 million color changes. It is relatively difficult to distinguish color details, color changes, and brightness changes. If the width of the image is W and the height is H, the data of an image i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00G06K9/62
CPCG06F18/23213G06T3/04
Inventor 赵跃进王克赵昕郭梦露王蒙
Owner XI AN JIAOTONG UNIV