Title :
Non-planar target for multi-camera network calibration
Author :
Shen, Edward ; Carr, G. Peter K ; Thomas, Paul ; Hornsey, Richard
Author_Institution :
VISOR Lab., York Univ., Toronto, ON, Canada
Abstract :
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.
Keywords :
calibration; cameras; feature extraction; wireless sensor networks; VSN simulator; extrinsic parameter extraction; field-of-view coverage; fixed reference point; inward-looking visual sensor networks; multicamera network calibration; Calibration; Cameras; Computer science; Educational institutions; Light emitting diodes; Mathematical model; Parameter extraction; Target tracking; Testing; Virtual prototyping;
Conference_Titel :
Sensors, 2009 IEEE
Conference_Location :
Christchurch
Print_ISBN :
978-1-4244-4548-6
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2009.5398433