Depth reconstruction uncertainty analysis and improvement - The dithering approach
| Document type: | Journal Articles |
|---|---|
| Article type: | Original article |
| Peer reviewed: | Yes |
| Author(s): | Jiandan Chen, Siamak Khatibi, Wlodek Kulesza |
| Title: | Depth reconstruction uncertainty analysis and improvement - The dithering approach |
| Journal: | Image and Vision Computing |
| Year: | 2010 |
| Volume: | 29 |
| Issue: | 9 |
| Pagination: | 1377-1385 |
| ISSN: | 0262-8856 |
| Publisher: | Elsevier |
| URI/DOI: | 10.1016/j.imavis.2010.03.003 |
| ISI number: | 000279506700005 |
| Organization: | Blekinge Institute of Technology |
| Department: | School of Engineering - Dept. of Electrical Engineering (Sektionen för ingenjörsvetenskap - Avd. för elektroteknik) School of Engineering S-371 79 Karlskrona +46 455 38 50 00 http://www.bth.se/ing/ |
| Language: | English |
| Abstract: | The depth spatial quantization uncertainty is one of the factors which influence the depth reconstruction accuracy caused by a discrete sensor. This paper discusses the quantization uncertainty distribution, introduces a mathematical model of the uncertainty interval range, and analyzes the movements of the sensors in an Intelligent Vision Agent System. Such a system makes use of multiple sensors which control the deployment and autonomous servo of the system. This paper proposes a dithering algorithm which reduces the depth reconstruction uncertainty. The algorithm assures high accuracy from a few images taken by low-resolution sensors. The dither signal is estimated and then generated through an analysis of the iso-disparity planes. The signal allows for control of the camera movement. The proposed approach is validated and compared with a direct triangulation method. The simulation results are reported in terms of depth reconstruction error statistics. The physical experiment shows that the dithering method reduces the depth reconstruction error. |
| Subject: | Signal Processing\General |
| Keywords: | Depth reconstruction, Dither, Iso-disparity planes, Quantization uncertainty |
