Tracking head positions in three-dimensional space by using a single omnidirectional camera

Kwanghyuk Bae; Kang Ryoung Park; Jai Hie Kim

doi:10.1117/1.2909667

1 April 2008 Tracking head positions in three-dimensional space by using a single omnidirectional camera

Kwanghyuk Bae, Kang Ryoung Park, Jai Hie Kim

Author Affiliations +

Optical Engineering, Vol. 47, Issue 4, 047205 (April 2008). https://doi.org/10.1117/1.2909667

Abstract

We propose a novel method using a single catadioptric omnidirectional camera to track 3-D head positions in nonintrusive biometric systems. Existing methods have not been able to deal with cases in which the ground plane is nonorthogonal to the optical axis of the camera. To overcome this problem, our proposed method presents the following three improvements: (i) By using 1-D tracking of the feet and head positions combined with a circular constraint in images instead of conventional 2-D tracking methods, the accuracy and computational efficiency of the tracking process is significantly improved, (ii) based on the detected 2-D head position in images with the precalibration information of the camera, the 3-D head positions can be obtained, and (iii) the 3-D head positions can be obtained without having the optical axis of the camera orthogonal to the ground plane. This makes the proposed method feasible in practical environments that use omnidirectional camera systems. Experimental results showed that the proposed method was able to track 3-D head positions at real-time speed.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Kwanghyuk Bae, Kang Ryoung Park, and Jai Hie Kim "Tracking head positions in three-dimensional space by using a single omnidirectional camera," Optical Engineering 47(4), 047205 (1 April 2008). https://doi.org/10.1117/1.2909667

Published: 1 April 2008

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available