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Scene recognition technology used in outdoor augmented reality system

An outdoor augmented reality, scene recognition technology, applied in the field of pattern recognition, can solve the problems of low refresh frequency and positioning accuracy of physical sensors, recognition accuracy rate and real-time performance degradation, etc., to achieve high scene recognition success rate, narrow retrieval range, accurate The effect of scene recognition results

Active Publication Date: 2011-05-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

Usually, physical sensors have the problems of low refresh frequency and positioning accuracy, and at the same time, as the number of target objects increases, the retrieval range of visual recognition will increase, resulting in a gradual decline in the recognition accuracy and real-time performance of visual methods. Most systems use a positioning method combining software and hardware technologies to complete outdoor scene recognition in a large-scale environment. This is also the main problem that the present invention focuses on and solves, that is, how to realize outdoor augmented reality applications through the combination of the above two methods. Fast and accurate scene recognition

Method used

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  • Scene recognition technology used in outdoor augmented reality system
  • Scene recognition technology used in outdoor augmented reality system
  • Scene recognition technology used in outdoor augmented reality system

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a flowchart of the scene recognition algorithm in the present invention. The implementation of each main step in the algorithm flow is introduced below.

[0030] figure 2 It is the LoG feature point, partial texture feature, contour feature extraction result and its PHOG histogram of some objects in the present invention.

[0031] The scenes in the outdoor environment are complex, and the typical characteristics of different scenes are different. For example, the contour features of objects such as buildings and vehicles are more obvious than their texture features (such as figure 2 shown). Therefore, to use texture features to distinguish figure 2 The two cars in it may not get the correct result. Texture features are usually represented by image blocks centered on feature points in the image (such as figure 2 Some texture features ...

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Abstract

The invention relates to the technical field of pattern recognition, in particular to a novel scene recognition technology used in an outdoor augmented reality system. The invention utilizes secondary spacial position information to restrain, so as to reduce the retrieval range of scene recognition at first, then provides two characteristics namely use texture and use profile to express the scene, and leads a categorizer with a simpler structure to evaluate posterior probability models of the two characteristics, so as to realize the scene recognition method based on visual sense. The scene recognition technology provided by the invention can meet the requirements of real-time performance and high recognition rate, and is suitable for application in outdoor augmented reality systems with larger range and more scenes.

Description

technical field [0001] The invention relates to the technical field of pattern recognition, in particular to a new scene recognition technology for outdoor augmented reality systems. Background technique [0002] Augmented Reality (Augmented Reality-AR) is an emerging computer application and human-computer interaction technology with the development of virtual reality technology. This technology integrates the computer-generated virtual environment with the real scene around the user, making the user feel convinced that the virtual environment is an integral part of the real scene around him. [0003] The application range of early augmented reality systems is usually limited to indoor or outdoor small-scale environments, and the research objects are mostly simple scenes with single or few targets. In recent years, with the development of augmented reality technology and its application scope and fields continue to expand, researchers have gradually begun to pay attention ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62G01S19/42
Inventor 王涌天郭俊伟陈靖刘越吕旸
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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