Low-cost interactive active range finder

Authors:
Masahiro Takatsuka;Geoff A. W. West;Svetha Venkatesh;Terry M. Caelli
Affiliations:
School of Information Technologies, The University of Sydney, Sydney, NSW 2006, Australia;School of Computing, Curtin University of Technology, GPO Box U1987, Perth 6845, Western Australia, Australia;School of Computing, Curtin University of Technology, GPO Box U1987, Perth 6845, Western Australia, Australia;Dept. of Computing Science, The University of Alberta, Edmonton, Alberta T6G 2H1, Canada
Venue:
Machine Vision and Applications
Year:
2003

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Abstract

This paper describes a new type of low-cost interactive active range finder and illustrates the effect of introducing interactivity to the range-acquisition process. The new range finder consists of only one camera and a laser pointer to which three LEDs are attached. When a user scans the laser, the camera captures the image of spots (one from the laser and the others from LEDs), and triangulation is carried out using the camera's viewing direction and the optical axis of the laser. The user interaction allows the range finder to acquire range data in which the sampling rate varies across the object depending on the underlying surface structures. Moreover, the processes of separating objects from the background and/or finding parts in the object can be achieved using the operator's knowledge of the objects.