Indoor visible light positioning system based on image sensor

In this dissertation, a visible light-based IPS using commonly used LED lamps and smartphone camera is investigated and implemented in Android phone. An ID extracting algorithm called frequency-label based on 2ASK-modulation [47] is designed to facilitate the extraction of ID frames from captured...

Πλήρης περιγραφή

Λεπτομέρειες βιβλιογραφικής εγγραφής
Κύριος συγγραφέας: Ye, Wen
Άλλοι συγγραφείς: Zhong Wende
Μορφή: Thesis
Γλώσσα:English
Έκδοση: 2018
Θέματα:
Διαθέσιμο Online:http://hdl.handle.net/10356/75955
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author Ye, Wen
author2 Zhong Wende
author_facet Zhong Wende
Ye, Wen
author_sort Ye, Wen
collection NTU
description In this dissertation, a visible light-based IPS using commonly used LED lamps and smartphone camera is investigated and implemented in Android phone. An ID extracting algorithm called frequency-label based on 2ASK-modulation [47] is designed to facilitate the extraction of ID frames from captured pictures by leveraging the rolling shutter effect of CMOS camera. In the procedure of position estimation by solving nonlinear equation sets, an optimized algorithm based on non-iterative SVD-based method [47] is deployed to obtain the close-form least square solution to position matrix and rotation matrix. Also, optimization of an image sensor-based indoor visible light positioning (VLP) system [47] by improving the positioning algorithm is discussed. We implement the algorithms on an Android phone by JAVA programming with the basic idea of state machine to control functional modules (capturing, image-processing and calculation). Real-time experiments are carried out to verify the performance of the proposed indoor positioning system. Results show that 3-D positioning errors are 6 cm on average, in the experiment space of 2×2×2 m3. The results reveal that the introduced SVD-based noniterative algorithm is more time-saving than the conventional algorithm (approximately 50-80 times). Meanwhile the positioning error and performance of the optimized VLP system are investigated experimentally. This dissertation achieves smartphone-based real-time indoor 3D positioning of high robustness with centimeter-level accuracy and 2 Hz positioning rate.
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spelling ntu-10356/759552023-07-04T15:56:04Z Indoor visible light positioning system based on image sensor Ye, Wen Zhong Wende School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering In this dissertation, a visible light-based IPS using commonly used LED lamps and smartphone camera is investigated and implemented in Android phone. An ID extracting algorithm called frequency-label based on 2ASK-modulation [47] is designed to facilitate the extraction of ID frames from captured pictures by leveraging the rolling shutter effect of CMOS camera. In the procedure of position estimation by solving nonlinear equation sets, an optimized algorithm based on non-iterative SVD-based method [47] is deployed to obtain the close-form least square solution to position matrix and rotation matrix. Also, optimization of an image sensor-based indoor visible light positioning (VLP) system [47] by improving the positioning algorithm is discussed. We implement the algorithms on an Android phone by JAVA programming with the basic idea of state machine to control functional modules (capturing, image-processing and calculation). Real-time experiments are carried out to verify the performance of the proposed indoor positioning system. Results show that 3-D positioning errors are 6 cm on average, in the experiment space of 2×2×2 m3. The results reveal that the introduced SVD-based noniterative algorithm is more time-saving than the conventional algorithm (approximately 50-80 times). Meanwhile the positioning error and performance of the optimized VLP system are investigated experimentally. This dissertation achieves smartphone-based real-time indoor 3D positioning of high robustness with centimeter-level accuracy and 2 Hz positioning rate. Master of Science (Signal Processing) 2018-09-10T08:19:54Z 2018-09-10T08:19:54Z 2018 Thesis http://hdl.handle.net/10356/75955 en 77 p. application/pdf
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Ye, Wen
Indoor visible light positioning system based on image sensor
title Indoor visible light positioning system based on image sensor
title_full Indoor visible light positioning system based on image sensor
title_fullStr Indoor visible light positioning system based on image sensor
title_full_unstemmed Indoor visible light positioning system based on image sensor
title_short Indoor visible light positioning system based on image sensor
title_sort indoor visible light positioning system based on image sensor
topic DRNTU::Engineering::Electrical and electronic engineering
url http://hdl.handle.net/10356/75955
work_keys_str_mv AT yewen indoorvisiblelightpositioningsystembasedonimagesensor