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Indoor visible positioning method and system based on camera shooting frame analysis

A positioning method, visible light technology, applied in the field of communication, can solve problems such as not taking into account the real scene, achieve accurate positioning results of visible light, and reduce the effect of background light

Active Publication Date: 2017-04-26
PEKING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Looking at previous studies and implementations, only one frame of image captured by a CMOS camera was used as the data source, without considering the real scene when the user actually uses the positioning application of the mobile terminal: first, the user hopes to open the application to get Positioning, instead of clicking the shooting button again; secondly, the shooting rate of the CMOS camera can reach 30 frames per second or even faster, that is to say, one call of the application by the user is enough to generate a dozen or more frames of images

Method used

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  • Indoor visible positioning method and system based on camera shooting frame analysis

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Embodiment Construction

[0068] The present invention will be described in detail below through specific embodiments and accompanying drawings.

[0069] The new visible light positioning system based on high-speed, high-capacity modulation, coding and image processing methods of this embodiment, figure 1 It is a schematic diagram of an indoor positioning system based on visible light according to an embodiment of the present invention, including a light source and a receiving device (also called an indoor positioning device based on visible light). The information that the indoor positioning system relies on may be light source identity information or other information.

[0070] The light source as figure 2 As shown, the data generator loop output corresponds to the LED ID. The signal processing module encodes the above data and adds a synchronization header to form a code word to be modulated. The code word will be modulated to the LED light to form a certain regular light and dark information. Th...

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Abstract

The invention discloses an indoor visible positioning method and system based on camera shooting frame analysis. The system comprises a plurality of LED light sources, wherein the LED light sources are used for emitting modulated visible light with ultra-long sequence information; and an indoor positioning device which is used for taking a series of images corresponding to the visible light emitted by the LED light sources, obtaining and recognizing the bright and dark stripes in the images, eliminating the background light of the image, demodulating the binary information in each image, jointing the information demodulated from each image to form a needed ultra-long sequence, obtaining the identity information of the light sources, searching the position information, corresponding to the identity information, in an indoor map, and obtaining the current position. The system can carry out the high-speed and large-capacity modulation, coding and image processing, can eliminate the background light in photographing, and can improve the image processing precision.

Description

technical field [0001] The invention belongs to the field of communication technology, and relates to the key technology of a visible light positioning system, in particular to an indoor visible light positioning method based on camera frame analysis and a novel visible light positioning system based on the method. Background technique [0002] With the rapid advancement of information technology and the widespread promotion of mobile devices in recent years, positioning services carried on mobile terminals have increasingly become an important auxiliary tool for people's lives. Especially in recent years, the vigorous development of the mobile Internet has made people's basic necessities of life inevitably connected with the Internet, which has given birth to Location Based Services (LBS) with the Internet as the entrance. Accurate indoor positioning technology can provide convenience for people in various indoor places such as supermarkets and shopping malls. While helping...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16H04B10/114H04B10/116H04B10/548
CPCG01S5/16H04B10/1149H04B10/116H04B10/548
Inventor 赵丹徐符杨川川
Owner PEKING UNIV
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