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Mathematical Problems in Engineering
Volume 2015, Article ID 329415, 13 pages
http://dx.doi.org/10.1155/2015/329415
Research Article

Markerless Augmented Reality via Stereo Video See-Through Head-Mounted Display Device

Department of Electrical Engineering, Chang Gung University, Taoyuan 333, Taiwan

Received 14 June 2015; Revised 10 September 2015; Accepted 27 September 2015

Academic Editor: Zhiqiang Ma

Copyright © 2015 Chung-Hung Hsieh and Jiann-Der Lee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Conventionally, the camera localization for augmented reality (AR) relies on detecting a known pattern within the captured images. In this study, a markerless AR scheme has been designed based on a Stereo Video See-Through Head-Mounted Display (HMD) device. The proposed markerless AR scheme can be utilized for medical applications such as training, telementoring, or preoperative explanation. Firstly, a virtual model for AR visualization is aligned to the target in physical space by an improved Iterative Closest Point (ICP) based surface registration algorithm, with the target surface structure reconstructed by a stereo camera pair; then, a markerless AR camera localization method is designed based on the Kanade-Lucas-Tomasi (KLT) feature tracking algorithm and the Random Sample Consensus (RANSAC) correction algorithm. Our AR camera localization method is shown to be better than the traditional marker-based and sensor-based AR environment. The demonstration system was evaluated with a plastic dummy head and the display result is satisfactory for a multiple-view observation.