Header

Shop : Details

Shop
Details
49,80 €
ISBN 978-3-8440-8992-9
Softcover
240 pages
116 figures
317 g
21 x 14,8 cm
English
Thesis
March 2023
Jianshuang Xu
Spatial Signal Processing in Optical Display-Camera Communication
Display-Camera Communication (DCC) is a special form of Visible Light Communication in which digital displays and cameras are utilized for optical free-space data transmission. Data is typically represented by 2D barcodes that can be reconstructed and decoded from camera recordings of the display. In DCC, synchronization issues arise in the 2D space domain of the image signal. On the one hand, optical projection including perspective distortion leads to an unknown position of the display in the camera image. The position varies frame by frame due to camera motion during handheld recording (frame-level spatial asynchrony). On the other hand, lens distortion results in nonlinear deviation of the symbol positions in the received signal (symbol-level spatial asynchrony).
To address the frame-level spatial asynchrony, a Frame Position Recovery method is presented in this thesis to localize the display and compensate for camera motion. This method allows reliable detection of the display position as well as the rotation of the display in the camera images, while minimizing the visual impact on the perceived video quality in case of imperceptible DCC.
To cope with the symbol-level spatial asynchrony, a novel Symbol Position Recovery approach is presented. Unlike most pattern-based linear techniques in the literature, the proposed method estimates the symbol positions based on the data pattern and compensates for lens distortion using a nonlinear model, which allows accurate detection of sampling points even for extremely small data blocks.
Comprehensive evaluation by simulations of the optical channel as well as experiments with different hardware combinations demonstrate excellent accuracy and reliability of the developed methods compared to state-of-the-art techniques.
Keywords: Visible Light Communication; Display-Camera Communiation; Signal Processing; Synchronization
Dortmunder Beiträge zur Kommunikationstechnik
Edited by Prof. Dr.-Ing. Rüdiger Kays, Dortmund
Volume 20
Available online documents for this title
You need Adobe Reader, to view these files. Here you will find a little help and information for downloading the PDF files.
Please note that the online documents cannot be printed or edited.
Please also see further information at: Help and Information.
 
 DocumentDocument 
 TypePDF 
 Costs37,35 € 
 ActionDownloadPurchase in obligation and download the file 
     
 
 DocumentTable of contents 
 TypePDF 
 Costsfree 
 ActionDownloadDownload the file 
     
User settings for registered online customers (online documents)
You can change your address details here and access documents you have already ordered.
User
Not logged in
Export of bibliographic data
Shaker Verlag GmbH
Am Langen Graben 15a
52353 Düren
Germany
  +49 2421 99011 9
Mon. - Thurs. 8:00 a.m. to 4:00 p.m.
Fri. 8:00 a.m. to 3:00 p.m.
Contact us. We will be happy to help you.
Captcha
Social Media