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Non-planar target for multi-camera network calibration

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4 Author(s)
Shen, E. ; VISOR Lab., York Univ., Toronto, ON, Canada ; Carr, G.P.K. ; Thomas, P. ; Hornsey, R.

Rapid calibration of multi-camera systems using planar targets is typically impractical. Here we report a non-planar target for rapid calibration of inward-looking visual sensor networks (VSNs), designed using a novel VSN simulator and verified experimentally. The target consists of a large central sphere, surrounded by several smaller, rigidly mounted spheres. Rotation about an axis through the center of this sphere changes the location of the outer spheres, while keeping a fixed reference point in the center to permit extrinsic parameter extraction. Using the simulation, different target configurations are tested for field-of-view (FOV) coverage for each camera. Experimental results using a constructed operational prototype are consistent with traditional planar target calibrations, but require only a single view of the target to extract the intrinsic parameters.

Published in:

Sensors, 2009 IEEE

Date of Conference:

25-28 Oct. 2009