Login (DCU Staff Only)
Login (DCU Staff Only)

DORAS | DCU Research Repository

Explore open access research and scholarly works from DCU

Advanced Search

A video-rate range sensor based on depth from defocus

Ghita, Ovidiu and Whelan, Paul F. orcid logoORCID: 0000-0001-9230-7656 (2001) A video-rate range sensor based on depth from defocus. Optics and Laser Technology, 33 (3). pp. 167-176. ISSN 0030-3992

Abstract
Recovering the depth information derived from dynamic scenes implies real-time range estimation. This paper addresses the implementation of a bifocal range sensor which estimates the depth by measuring the relative blurring between two images captured with different focal settings. To recover the depth accurately even in cases when the scene is textureless, one possible solution is to project a structured light on the scene. As a consequence, in the scene's spectrum a spatial frequency derived from illumination pattern is evident. The resulting algorithm involves only simple local operations, this assures the possibility of computing the depth at a rate of 10 frames per second. The experimental results indicate that the accuracy of this proposed sensor compares well with that offered by other methods such as stereo and motion parallax, while avoiding the problems caused by occlusion and missing parts.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:computer vision; image analysis; Range sensing; Image blurring model; Active illumination; Focus operator;
Subjects:UNSPECIFIED
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
Research Initiatives and Centres > Research Institute for Networks and Communications Engineering (RINCE)
Publisher:Elsevier
Official URL:http://dx.doi.org/10.1016/S0030-3992(01)00010-X
Copyright Information:Copyright © 2001 Elsevier Science Ltd.
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:2457
Deposited On:09 Mar 2009 15:49 by DORAS Administrator . Last Modified 17 Jan 2019 13:48
Documents

Full text available as:

[thumbnail of olt_2001.pdf]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
924kB
Downloads

Downloads

Downloads per month over past year

Archive Staff Only: edit this record