Edge extraction method of color image

A color image, edge extraction technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of low extraction and detection efficiency, large amount of calculation, etc., to achieve complete edge extraction results, improve detection radius, and improve detection efficiency Effect

Active Publication Date: 2013-03-27
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

During edge extraction, the grayscale image is processed to extract the edge features of the image as a whole.

Method used

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  • Edge extraction method of color image
  • Edge extraction method of color image
  • Edge extraction method of color image

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Embodiment Construction

[0011] The present invention will be described in further detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0012] Such as figure 1 Shown is the flow chart of the edge extraction method of the color image in this embodiment, comprising the following steps:

[0013] U1) Filter the original color image to be processed.

[0014] In this step, filter processing is performed to reduce the impact of image noise on subsequent image processing. Preferably, Gaussian filters of three different scales are used to perform filtering three times to obtain a first filtered image, a second filtered image and a third filtered image; the first filtered image, the second filtered image and the third filtered image The filtered images are combined to obtain the final filtered color image.

[0015] Specifically, the Gaussian filter is expressed as a function G ( x , y ...

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Abstract

The invention discloses an edge extraction method of a color image. The method includes the following steps: 1) filtering an original color image to be processed; 2) converting the filtered color image into a color space coordinate system; 3) respectively extracting an image interesting area in each coordinate vector and 4) conducting edge detection on the extracted interesting area under each coordinate vector to obtain an edge image of each coordinate vector and combining and overlaying the edge images of the coordinate vector to obtain a final edge image. Due to the fact that edge detection is only conducted on the interesting areas in the edge extraction method, information processing quantity is less in edge detection, and detection radius of an edge detection operator can be improved. Simultaneously, the color image is converted in the color space coordinate system to be processed in the edge extraction process, so that the method enables edge extraction result to be more complete compared with the prior art that a method for converting the color image into a gray-scale map for processing is adopted.

Description

【Technical field】 [0001] The invention relates to the field of computer image processing, in particular to an edge extraction method for color images. 【Background technique】 [0002] Edge, as a basic feature of an image, contains important information about the shape of an object. Therefore, a lot of research has focused on the edge extraction method that can extract the most meaningful feature part of the image, that is, the edge of the image. At present, edge extraction is widely used in aerospace, communication, meteorological biology, military, geophysics, robot vision, 2D to 3D technology, medicine and industrial production and other fields. [0003] Existing edge extraction methods mainly include steps such as filtering, enhancing edges, and detecting edge points. During edge extraction, the grayscale image is processed to extract the edge features of the image as a whole. The extraction process has a large amount of calculation, and the extraction and detection effi...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T5/00
Inventor 张颖刘翠王好谦张永兵
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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