Target recognition and shape retrieval method based on hierarchical description

A technology of hierarchical description and target recognition, applied in the field of target recognition and shape retrieval, it can solve the problems of easy mismatch, sensitivity to local changes, redundant information, etc., to improve accuracy and robustness, and reduce computational complexity. degree of effect

Inactive Publication Date: 2013-10-09
SUZHOU UNIV
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AI Technical Summary

Problems solved by technology

Global features can describe the overall characteristics of the target. It is especially useful for simple target shapes and a single closed contour, but it is sensitive to local changes and prone to mismatches, such as Shape Contexts, Inner-Distance and Multi-scale Representation
Local features can

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  • Target recognition and shape retrieval method based on hierarchical description
  • Target recognition and shape retrieval method based on hierarchical description
  • Target recognition and shape retrieval method based on hierarchical description

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[0054] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0055] Participate figure 1 As shown, the object recognition and shape retrieval method based on hierarchical description of the present invention specifically includes:

[0056] S1. Extract the edge feature of the target, and use the contour extraction algorithm to extract the contour feature of the target;

[0057] S2, ...

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Abstract

The invention discloses a target recognition and shape retrieval method based on hierarchical description. The method comprises the following steps of: extracting the profile feature of a target by a profile extracting algorithm, calculating a curvature value of each point on the profile target, extracting the angular point feature of the target by non-maximum value suppression, taking a profile segment corresponding to every two angular points as an overall feature describer of the target, carrying out hierarchical description on the profile points according to curvature, carrying out hierarchical description on the profile segments according to the importance degrees of value features, combining profile segments, the values of which are lower than evaluation thresholds, to form profile feature segments as partial feature describers of the target, carrying out normalization on the profile feature segments, and carrying out similarity measurement on the profile feature segments of different targets according to Shape Contexts distance. The method can be used for performing feature extraction on a target shape effectively, scale invariance, rotation invariance and translation invariance are achieved, the accuracy rate and the robustness in recognition are improved, and the computation complexity is reduced.

Description

technical field [0001] The invention relates to the technical field of object recognition and shape retrieval, in particular to an object recognition and shape retrieval method based on hierarchical description. 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 wide baseline matching, object category recognition, image and video retrieval, specific object recognition, robot navigation, scene classification, texture recognition and data mining and other fields. [0003] According to the source of the feature, the shape description method is divided into two categories: the method based on the contour and the method based on the...

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Application Information

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IPC IPC(8): G06K9/00G06K9/46
Inventor 黄伟国顾超陈祥芹朱忠奎朱文艳刘健
Owner SUZHOU UNIV
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