Near-real-time implementation of multiple light source optical flow
department or school: Science, Faculty of
department or school: Computer Science, Department of
data provider: DSpace
degree campus: UBCV
creator: Siegerist, Cristina Elena
issued: 2009-02-10T19:58:54Z
issued: 1996
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: Multiple light source optical flow is a method to compute a dense, local representation of optical flow. The basic idea is to overcome the aperture problem using multiple images of a moving object acquired simultaneously under different conditions of illumination. Each image provides one linear constraint equation. When the optical flow and the 2D motion field coincide these equations are in the same unknowns. Two equations are enough to calculate both velocity componentss. Three or more images over-determine the system, allowing the calculation of confidence measures and making the computation more robust. This thesis presents a parallel, near-real-time implementation of multiple light source optical flow. Three light sources, one red, one green, and one blue, with negligible overlap in the visible spectrum illuminate the work place from different directions. Three separate black and white images corresponding to the three light sources are acquired simultaneously through a 3 CCD 24 bit RGB camera. The processing is done using a network of six independent processors. The encoded optical flow is displayed on a video monitor. For an image of size 240x240 pixels the processing rate is 4 frames/sec. The range of linear behaviour of the system was studied. A comparison with other methods on a synthetic and a real image sequence is presented.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/4404
extent: 7741364 bytes
format: application/pdf
note: Near-Real-Time Implementation of Multiple Light Source Optical Flow by Cristina Elena Siegerist M . S c , Physics, University of Oregon, 1993. Lie. Physics, Universidad de Buenos Aires, Argentina, 1989. A THESIS S U B M I T T E D IN P A R T I A L F U L F I L L M E N T O F T H E R E Q U I R E M E N T S F O R T H E D E G R E E O F Master of Science in T H E F A C U L T Y O F G R A D U A T E STUDIES (Department of Computer Science) We accept this thesis as conforming to the required standard The University of British Columbia Apri l 1996 © Cristina Elena Siegerist, 1996 In presenting this thesis in partial fulfillment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for refer-ence and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the head of my department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of Computer Science £he University of B r i t i s h Columbia Vancouver, Canada Date A p r i l 22, 1996 Abstract Multiple light source optical flow is a method to compute a dense, local represen-tation of optical flow. The basic idea is to overcome the aperture problem using multiple images of a moving object acquired simultaneously under different condi-tions of illumination. Each image provides one linear constraint equation. When the optical flow and the 2D motion field coincide these equations are in the same un-knowns. Two equations are enough to calculate both velocity componentss. Three or more images over-determine the system, allowing the calculation of confidence measures and making the computation more robust. This thesis presents a parallel, near-real-time implementation of multiple light source optical flow. Three light sources, one red, one green, and one blue, with negligibl…
has type: Thesis/Dissertation
date issued: 1996-05
is shown at: 10.14288/1.0051375
language: eng
degree discipline: Computer Science
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/4404