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Precise identification and position method of robust coding point in image under complex background

A complex background and positioning method technology, applied in the field of automatic image recognition, can solve problems such as robust image recognition and positioning methods that have not yet appeared

Inactive Publication Date: 2012-04-11
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no related image recognition and positioning method with higher robustness and accuracy in complex backgrounds.

Method used

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  • Precise identification and position method of robust coding point in image under complex background
  • Precise identification and position method of robust coding point in image under complex background
  • Precise identification and position method of robust coding point in image under complex background

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Embodiment Construction

[0081] The method of the present invention will be further described below in conjunction with the accompanying drawings.

[0082] Such as image 3 As shown, the accurate identification and location method of the robust coding point in the image under the complex background of the present invention has the following steps:

[0083] Evenly arrange multiple different coding points and non-coding points on the surface of the measured object;

[0084] Capture images with a webcam or digital camera;

[0085] Using the image collected above to extract the central ellipse of the code point in the image;

[0086] Obtaining the coding band information of the central ellipse according to the central ellipse, and using the coding band information to correct the parameters of the central ellipse;

[0087] The code points are decoded according to the corrected central ellipse parameters, and the ID number of each code point is output.

[0088] When the present invention recognizes code...

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Abstract

The invention relates to a precise identification and position method of robust coding points in an image under complex background, comprising the following steps: evenly arranging a plurality of different coding points and non-coding points on the surface of the objects to be detected; utilizing a camera or a digital camera to acquire images; utilizing the acquired images to extract the central oval of coding points in the images; obtaining coding strip information of the central oval according to the central oval, and utilizing the coding strip to modify parameters; and decoding the coding points according to modified parameters of the central oval and outputting the ID number of each coding point. The invention has strong robust property and high precision, and can be directly embeddedinto the data preprocessing system of three-dimensional digital measurement software, thereby providing reliable input data for successive three-dimensional reconstruction.

Description

technical field [0001] The invention relates to the field of automatic recognition of images, in particular to a method for precise recognition and positioning of robust coding points in images under complex backgrounds. Background technique [0002] In image-based three-dimensional digital measurement, it is usually necessary to place some distinctive and easily identifiable coding points on the measured object, and each coding point has a unique identity code. After identifying the coding points in each image, the corresponding matching of coding points among multiple images can be realized quickly and reliably. Code point recognition is the basis and premise of 3D accurate measurement, and the quality of recognition has a great impact on the accuracy of subsequent 3D reconstruction. [0003] There are various forms of code points, a generally recognized code point such as figure 1 shown. This kind of code point is basically not affected by rotation, scaling and deforma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T7/00G01B11/00G01B11/24
Inventor 夏仁波赵吉宾刘伟军
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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