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LED (Light Emitting Diode) lamp tracking method and system under complex scene based on Kalman filtering

A Kalman filter and Kalman filter technology, applied in the fields of visible light communication and LED lamp tracking, can solve the problems of large noise interference, indistinguishability, and deviation of LED lamps, and achieve the goal of improving imaging quality, tracking accuracy and tracking speed. Effect

Pending Publication Date: 2018-07-13
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because LED lights are greatly affected by other light sources, and the distance that can be detected is relatively short, they have not been widely used yet.
[0003] The existing LED light tracking system based on image processing technology directly identifies and locates the LED light, and the obtained position of the LED light is greatly disturbed by noise. There will be a large deviation in the position of the LED light in the image, and this deviation cannot be eliminated or reduced by traditional image processing techniques
Moreover, the traditional LED light tracking technology can generally only track one LED light. Even if multiple LED lights in the image can be detected, they cannot be distinguished

Method used

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  • LED (Light Emitting Diode) lamp tracking method and system under complex scene based on Kalman filtering
  • LED (Light Emitting Diode) lamp tracking method and system under complex scene based on Kalman filtering
  • LED (Light Emitting Diode) lamp tracking method and system under complex scene based on Kalman filtering

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Embodiment 1

[0054] as attached figure 1 As shown, this embodiment discloses a Kalman filter-based LED light tracking system in a complex scene. The LED light tracking system is used for identifying the position of the LED light, predicting the position of the LED light, and optimizing the position of the LED light.

[0055] as attached figure 2 As shown, the single-chip microcomputer sends pulse sequences of different frequencies to control the LED lamp driving circuit, so that the LED lamp changes from "on" to "off" at different frequencies, so that different LEDs on the LED image captured by the COMS camera have different stripes feature.

[0056] as attached image 3 As shown, each frame of LED image captured by the CMOS camera contains 4 LED lights, after being processed by the image processing system, the obtained Figure 4 The binarized LED image shown, using this binarized LED image, you can get the position Z of different LEDs K . Realize the Kalman filter through DSP, for t...

Embodiment 2

[0067] Such as figure 1 , a Kalman filter-based LED light tracking system in complex scenes, including: an LED light emission frequency control subsystem, a robot camera subsystem, an image processing subsystem, and a Kalman filter subsystem.

[0068] Among them, the LED light emitting frequency control subsystem sends pulse sequences of different frequencies through the programmable single-chip microcomputer to control the LED light driving circuit, and then drives the LED light to flash. The pulse sequences of 50Hz, 100Hz, 200Hz, and 400Hz are used here, such as figure 2 shown.

[0069] Among them, the robot camera subsystem is connected in turn by the CMOS camera installed on the top of the robot, the CMOS camera parameter setting module, the robot host computer, and the WIFI module. The image processing subsystem remotely controls the CMOS camera parameter setting module to set the focal length, exposure time, exposure compensation, and sensitivity of the CMOS camera, so...

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Abstract

The invention discloses an LED (Light Emitting Diode) lamp tracking method and system under a complex scene based on Kalman filtering. The system comprises an LED light emitting frequency control subsystem, a robot CMOS (Complementary Metal-Oxide-Semiconductor) camera subsystem, an image processing subsystem and a Kalman filter, wherein the LED light emitting frequency control subsystem, the robotCMOS camera subsystem, the image processing subsystem and the Kalman filter are connected in sequence; the LED light emitting frequency control subsystem is controlled by pulse sequences of differentfrequencies; the robot CMOS camera subsystem can capture an LED image with alternate black and white stripes; the image processing subsystem carries out filtering on an LED image, identifies the LEDand positions the position of the LED; the Kalman filter carries out prediction and measurement to obtain more accurate LED position information. According to the LED lamp tracking system, the Kalmanfiltering technology is applied to LED tracking, the tracking accuracy of the LED is improved, and in addition, the LED lamp tracking system has the advantages of high anti-noise anti-interference performance and wide application prospect.

Description

technical field [0001] The present invention relates to the technical fields of visible light communication and LED light tracking, in particular to a method and system for tracking LED lights in complex scenes based on Kalman filtering. Background technique [0002] In recent years, with the rapid development of the LED industry, a variety of high-performance LEDs have been developed, and a series of multi-functional lighting technologies based on LEDs have also been excavated, truly realizing "one light with multiple functions". In particular, with the development of visible light communication technology, scientists have gradually discovered the potential of LED in the field of communication, making it join the ranks of "information messengers". The reason why LEDs are used in the communication field is because of their outstanding advantages such as good modulation performance, high modulation sensitivity, and strong anti-interference ability, so that people can convert ...

Claims

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Application Information

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IPC IPC(8): G01C21/20H05B33/08H04N5/235H05B44/00
CPCG01C21/206H05B45/10H05B45/37H04N23/73
Inventor 吴玉香巫朝政关伟鹏陈艺荣周泽鑫方良韬
Owner SOUTH CHINA UNIV OF TECH
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