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Contour chord angle feature based identification method for blocked target

A technology of target recognition and chord angle, which is applied in the direction of character and pattern recognition, instruments, computer parts, etc., can solve the problems of unobtainable, etc., and achieve the effect of reducing computational complexity, improving accuracy and robustness

Active Publication Date: 2015-10-14
上海硕道信息技术有限公司
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a method for occluded target recognition based on contour chord angle features, so as to realize shape matching and target recognition when the complete contour cannot be obtained

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  • Contour chord angle feature based identification method for blocked target
  • Contour chord angle feature based identification method for blocked target
  • Contour chord angle feature based identification method for blocked target

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] ginseng figure 1 As shown, the occlusion target recognition method based on the contour chord angle feature of the present invention specifically includes:

[0035] S1. Establishing a template library of local features of multiple target images;

[0036] S2, extracting the edge of the target image, using a contour extraction algorithm to extract the contour points of the edge of the target image;

[0037] S3. Construct the chord angle feature of each contour point as a chord angle feature descriptor;

[0038] S4. Using the self-contained attribute of the chord angle feature descriptor to describe the occluded contour, and obtain the chord angle feature descriptio...

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Abstract

The present invention relates to a contour chord angle feature based identification method for a blocked target. The method comprises: establishing a template library of local features of a plurality of target images; extracting a contour feature of a target edge; constructing a chord angle feature descriptor of each contour point; describing a blocked contour by using a self-containing attribute of the chord angle feature descriptor, to obtain a chord angle feature description matrix of contour segments; calculating distances between the chord angle feature descriptors of target image contour points and the chord angle feature descriptors of the contour points of the local feature in the template library by using an L1 measurement method, to obtain a matching cost matrix; and calculating a similarity of the matching cost matrix by using an integral graph algorithm, so as to identify a partially blocked object. According to the present invention, a contour space position feature of a target shape can be extracted, and blocked targets can be identified, and scale invariance, rotational invariance and translation invariance are achieved, thereby increasing the accuracy and robustness of target identification and shape search.

Description

technical field [0001] The invention relates to the technical fields of image recognition and shape retrieval, in particular to a method for recognizing occluded objects based on contour chord angle features. Background technique [0002] How to make robot vision automatically recognize and recognize objects is a very challenging problem in the real world. The latest progress in this research is mainly to design intelligent shape descriptors to provide better similarity measures. Object recognition and shape retrieval are research hotspots in robot vision, and have been widely used in engineering, such as image and video matching, object recognition, robot navigation, deep learning, scene classification, image segmentation and other fields. [0003] According to the feature source, the shape description method is divided into two categories: contour-based method and transform domain-based method. The features of the contour-based method all come from the target contour, such...

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Application Information

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IPC IPC(8): G06K9/48
CPCG06V10/46G06V2201/07
Inventor 胡大盟黄伟国张永萍毕威朱忠奎
Owner 上海硕道信息技术有限公司
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