Scene information searching method based on binary feature codes

A technology of scene information and search method, which is applied in the field of mobile augmented reality, to save matching time, reduce the scope, and improve the effect of quick matching ability

Active Publication Date: 2014-01-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
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Problems solved by technology

At the same time, in the process of image recognition and matching, powerful computing power is also required for descriptor indexing and matching

Method used

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  • Scene information searching method based on binary feature codes
  • Scene information searching method based on binary feature codes
  • Scene information searching method based on binary feature codes

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Embodiment Construction

[0036] The present invention will be described in detail below with reference to the drawings and embodiments.

[0037] Such as figure 1 As shown, the scene information search method based on the binary feature code of the present invention, the sample image library applicable to this method satisfies three conditions: ① each sample image has GPS information, ② each sample image is represented by a binary feature code, and stored into a linked list with GPS information as the clustering center, ③ the sample image library corresponds to a certain Hash function used to map the binary feature code; the specific process of this method is: Step 1: the user turns on the shooting device of the terminal, and the terminal collects The image to be recognized of the scene; then call the GPS sensor interface and the gravity sensor interface of the terminal to obtain the GPS information of the current scene and the gravity direction information when the terminal collects the image g=[g x ...

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Abstract

The invention provides a scene information searching method based on binary feature codes, and belongs to the technical field of mobile augmented reality technologies. The scene information searching method specifically includes the steps of firstly, collecting an image to be recognized of a current scene, and obtaining GPS information and gravity direction information; secondly, obtaining a descriptor feature vector of the image to be recognized; thirdly, packaging the GPS information, the gravity direction information and the descriptor feature vector into a descriptor file, and sending the descriptor file to a server; fourthly, calculating the included angle between the main direction of the descriptor feature vector and the gravity direction of the descriptor feature vector through the server; fifthly, conducting mapping on the descriptor feature vector through the Hash function; sixthly, finding a corresponding GPS information chain table closest to the GPS information; seventhly, obtaining a Hash table set; eighthly, conducting filtering on the Hash table set based on the included angle; ninthly, finding the best matching sample image in the Hash table set which is filtered, and feeding the scene information corresponding to the sample image back to a mobile terminal.

Description

technical field [0001] The invention belongs to the technical field of mobile augmented reality, and in particular relates to a scene information search method based on a binary feature code. Background technique [0002] Image search is a hot topic in the research of content-based information retrieval, and has a wide range of applications in the fields of remote sensing image processing, medical image processing and augmented reality. [0003] At present, with the development of the Internet, human beings are stepping into an information society, and the Internet has become an important platform for human beings to publish, obtain and exchange information. The exponential growth of the amount of information on the Internet has made it an important issue for users to quickly and accurately find the information they need in massive amounts of data. In recent years, with the popularity of electronic products such as cameras, smart phones, PADs, and video cameras, we can take...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/51G06F16/58G06F16/5838
Inventor 桂振文刘越王涌天
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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