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Integration of Video Images and Cad Wireframes for 3D Object Localization : Volume I-3, Issue 1 (23/07/2012)

By Persad, R. A.

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Book Id: WPLBN0004013618
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Integration of Video Images and Cad Wireframes for 3D Object Localization : Volume I-3, Issue 1 (23/07/2012)  
Author: Persad, R. A.
Volume: Vol. I-3, Issue 1
Language: English
Subject: Science, Isprs, Annals
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Armenakis, C., Sohn, G., & Persad, R. A. (2012). Integration of Video Images and Cad Wireframes for 3D Object Localization : Volume I-3, Issue 1 (23/07/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Geomatics Engineering, GeoICT Lab Earth and Space Science and Engineering York University 4700 Keele St., Toronto, Ontario, M3J 1P3 Canada. The tracking of moving objects from single images has received widespread attention in photogrammetric computer vision and considered to be at a state of maturity. This paper presents a model-driven solution for localizing moving objects detected from monocular, rotating and zooming video images in a 3D reference frame. To realize such a system, the recovery of 2D to 3D projection parameters is essential. Automatic estimation of these parameters is critical, particularly for pan-tilt-zoom (PTZ) surveillance cameras where parameters change spontaneously upon camera motion. In this work, an algorithm for automated parameter retrieval is proposed. This is achieved by matching linear features between incoming images from video sequences and simple geometric 3D CAD wireframe models of man-made structures. The feature matching schema uses a hypothesis-verify optimization framework referred to as LR-RANSAC. This novel method improves the computational efficiency of the matching process in comparison to the standard RANSAC robust estimator. To demonstrate the applicability and performance of the method, experiments have been performed on indoor and outdoor image sequences under varying conditions with lighting changes and occlusions. Reliability of the matching algorithm has been analyzed by comparing the automatically determined camera parameters with ground truth (GT). Dependability of the retrieved parameters for 3D localization has also been assessed by comparing the difference between 3D positions of moving image objects estimated using the LR-RANSAC-derived parameters and those computed using GT parameters.

Summary
INTEGRATION OF VIDEO IMAGES AND CAD WIREFRAMES FOR 3D OBJECT LOCALIZATION

 

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