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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5663

Title: Using temporal seeding to constrain the disparity search range in stereo matching
Authors: Ndhlovu, T
Nicolls, F
Keywords: Temporal seeding
Stereo matching
Issue Date: Nov-2011
Publisher: PRASA
Citation: Ndhlovu, T and Nicolls, F. Using temporal seeding to constrain the disparity search range in stereo matching. Proceedings of the Twenty-Second Annual Symposium of the Pattern Recognition Association of South Africa, Vanderbijlpark, South Africa, 22-25 November 2011
Series/Report no.: Workflow;7725
Abstract: In a stereo image sequence, finding feature correspondences is normally done for every frame without taking temporal information into account. Reusing previous computations can add valuable information. A temporal seeding technique is developed for reusing computed disparity estimates on features in a stereo image sequence to constrain the disparity search range. Features are detected on a left image and their disparity estimates are computed using a local-matching algorithm. The features are then tracked to a successive left image of the sequence and by using the previously calculated disparity estimates, the disparity search range is constrained. Errors between the local-matching and the temporal seeding algorithms are analysed. Results show that although temporal seeding suffers from error propagation, a decrease in computational time of approximately 20% is obtained when it is applied on 87 frames of a stereo sequence. Furthermore a confidence measure is used to select start-up points for seeding and experiments are conducted on features with different confidences.
Description: Proceedings of the Twenty-Second Annual Symposium of the Pattern Recognition Association of South Africa, Vanderbijlpark, South Africa, 22-25 November 2011
URI: http://www.prasa.org/proceedings/2011/prasa2011-21.pdf
http://hdl.handle.net/10204/5663
ISBN: 978-0-620-51914-4
Appears in Collections:Mobile intelligent autonomous systems
General science, engineering & technology

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