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A method and device for image edge extraction based on circular operator

A technology of image edge and extraction method, which is applied in the field of image processing and can solve problems such as inability to extract edge structure.

Inactive Publication Date: 2019-07-23
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can only extract the edge information of the local 2×2 pixel or 3×3 pixel texture primitive size, and cannot extract the edge structure of other scales

Method used

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  • A method and device for image edge extraction based on circular operator
  • A method and device for image edge extraction based on circular operator
  • A method and device for image edge extraction based on circular operator

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0028] figure 1 It is a schematic diagram of four edge detection operators in the prior art.

[0029] Such as figure 1 As shown, among the four edge detection operators in the prior art,

[0030] Among them, the Robert operator includes two templates, a 45° template and a 135° template, and the detection scale of each template is 2×2;

[0031] The canny operator includes 2 templates, 0° template and 90° template, and ...

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Abstract

The invention discloses an image edge extraction method and device based on a circle operator, wherein the method includes the following steps: acquiring an image to be tested, the image to be tested includes a plurality of texture primitives; The operator, from multiple directions and angles, performs image edge extraction calculations on the texture primitives in the test image that match the size of the operator template in the current circular operator group, and obtains the edge identification of the central pixel point of the texture primitives value; the edge identification value of each central pixel in the image to be tested is binarized to obtain the edge extraction result of the image to be tested. The present invention realizes image edge extraction with multi-directional angles, multi-scales, and selective direction and angle scales, so that the extracted edge information is more obvious, the edge extraction effect is good, and it can be flexibly selected according to the requirements of the edge extraction effect to be realized. Operator templates provide more freedom of operation.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image edge extraction method and device based on a circular operator. Background technique [0002] Edge is one of the most basic features of an image, which contains most of the feature information of the image. It is the main feature means of image processing and pattern recognition. Image edge detection has become one of the key research hotspots. The edge detection operator of nature and extraction effect. Through edge detection, the target and the background can be separated, the image analysis can be simplified, and the edge information that can accurately represent the image can be extracted. [0003] The neighborhood centered on the pixel to be processed is used as the basis for grayscale analysis to realize the detection and extraction of image edges. Based on this feature, predecessors proposed related gradient edge detection operators, such as Robert oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46
CPCG06V10/44
Inventor 王瑜张娜闫怀鑫肖洪兵
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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