Sphereo: Determining Depth Using Two Specular Spheres And A Single Camera

Shree K. Nayar

doi:10.1117/12.949051

7 March 1989 Sphereo: Determining Depth Using Two Specular Spheres And A Single Camera

Shree K. Nayar

Proceedings Volume 1005, Optics, Illumination, and Image Sensing for Machine Vision III; (1989) https://doi.org/10.1117/12.949051
Event: 1988 Cambridge Symposium on Advances in Intelligent Robotics Systems, 1988, Boston, MA, United States

Abstract

This paper proposes a method for determining the depth of points in a three-dimensional scene. The concept is to use two spheres with highly specular surfaces to obtain two different perspectives of the scene. Both spheres are viewed by a single stationary camera, and each sphere reflects the world around it into the camera. Correspondence between points on the two spheres is established by matching features such as edges and image intensities, as in traditional stereopsis. Depth is recovered from each pair of corresponding points by triangulation. The use of a single fixed camera avoids the undesirable complexities that characterize the stereo calibration procedure. The measurable range of the system is greatly enhanced by the use of specular spheres and is not limited by the field of view of the camera. Experiments were conducted to determine the accuracy in depth measurement and the feasibility of practical implementation. The technique presented in this paper has been named "SPHEREO" as it uses two SPHeres, rather than two cameras, to emulate stEREOpsis.

Citation Download Citation

Shree K. Nayar "Sphereo: Determining Depth Using Two Specular Spheres And A Single Camera", Proc. SPIE 1005, Optics, Illumination, and Image Sensing for Machine Vision III, (7 March 1989); https://doi.org/10.1117/12.949051

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