Method for sub-pixel edge detection based on pseudo Zernike moments

A sub-pixel edge detection method technology, applied in the field of image processing, can solve the problems of high computational complexity, low precision, sensitivity to noise, etc.

Active Publication Date: 2015-06-17
DALIAN UNIV OF TECH
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Problems solved by technology

[0006] Aiming at the problems that the existing sub-pixel edge detection method has low precision, is sensitive to noise, and has high computational complexity, the present invention proposes a new sub-pixel edge detection method based on pseudo-Zernike moments, and the specific scheme is:

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  • Method for sub-pixel edge detection based on pseudo Zernike moments
  • Method for sub-pixel edge detection based on pseudo Zernike moments
  • Method for sub-pixel edge detection based on pseudo Zernike moments

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Embodiment

[0128] The beneficial effect of the present invention is that: in order to verify the effectiveness of the present invention, a computer simulation experiment is carried out. In the experiment, the experimental parameters are CPU IntelR CoreTM i3 2.4GHz, 2G memory, the graphics card is ATI Mobility Radeon HD 5470, the system is Window7 Home Edition, and the software programming environment is Matlab2010b. The image of the experiment of the present invention is to utilize artificially synthesized image and actual image, is 400 pixels * 400 pixels for the size of artificially synthesized picture, and is 512 pixels * 512 pixels for the actual picture selection.

[0129] The present invention refers to two documents, i.e. document [2], document [5], document [6]. The invention method is compared with document [2], document [5] and document [6]. The specific simulation The result is as Figure 5 And shown in Table 5, Table 6 and Table 7.

[0130] Table 5 The error of the edge pos...

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Abstract

The invention discloses a method for sub-pixel edge detection based on pseudo Zernike moments. The method is characterized by comprising the following steps: 1, performing noise removal on an input image; 2, performing pixel-level edge detection on the image after noise removal; 3, performing sub-pixel edge detection on a to-be-processed image by adopting a pseudo Zernike moment method; 4, performing error compensation of edge positions on the to-be-processed image; and 5, obtaining a corrected actual edge after the sub-pixel edge detection, and processing all pixels of the to-be-processed image according to the manner of the step 4 to finish the sub-pixel edge detection of the image. The method provided by the invention is insensitive to noise, so that the accuracy of a sub-pixel edge is improved, and the computational complexity required by edge detection is reduced.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a sub-pixel edge detection method based on pseudo-Zernike moments. Background technique [0002] With the rapid development of my country's economy, the degree of mechanization and intelligence in the industrial field will increase rapidly, and the development space of image edge detection technology is also considerable. The edge detection technology based on computer vision has the advantages of high precision, fast speed, non-contact and high degree of automation. Since the edge of the image contains a lot of useful information, the accuracy of the edge detection result also has an important impact on the subsequent image processing, such as object registration, object size measurement, object detection and recognition, etc., so accurate Extracting image edges plays an important role in computer vision-based detection systems. In a computer vision system, the accura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 陈喆殷福亮杨兵兵
Owner DALIAN UNIV OF TECH
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