A prism-based single-lens stereovision system: From trinocular to multi-ocular

  • Authors:

  • Yong Xiao;Kah Bin Lim

  • Affiliations:

  • Control and Mechatronics Laboratory, Department of Mechanical Engineering, National University of Singapore, EA 04-06, 10 Kent Ridge Crescent, Singapore 119260, Singapore;Control and Mechatronics Laboratory, Department of Mechanical Engineering, National University of Singapore, EA 04-06, 10 Kent Ridge Crescent, Singapore 119260, Singapore

  • Venue:
  • Image and Vision Computing
  • Year:
  • 2007

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Abstract

This paper investigates a passive stereovision system which employs one single CCD camera and one pyramid-like glass prism. Its trinocular variety is first presented: each image captured by this system can be split into three sub-images and these sub-images are taken as the images simultaneously captured by three virtual cameras which are generated by the prism. Two different approaches are developed to model this system: one bases on a conventional camera calibration technique and the other bases on geometrical analysis of ray sketching. The second approach is a relatively simpler but is sufficiently accurate as compared to the calibration based approach. Then the knowledge on this trinocular system is extended to build a single-lens multi-ocular stereovision system. Experiments are conducted to validate this system. The ideas presented in this paper are believed novel.