Multi-Camera Network Calibration With a Non-Planar Target

The rapid calibration of multi-camera systems using a planar target is typically impractical due to the difficulty of viewing the target in each camera simultaneously. To address these short-comings, a complete calibration methodology using a novel non-planar target for rapid calibration of inward-looking visual sensor networks (VSNs) is presented. We discuss the practical limitations of the approach, arising from an analysis of implementation issues when using spheres as calibration targets such as target-to-target and target-to-camera orientation relationships. This procedure is applied to fully calibrate (intrinsic and extrinsic camera parameters) a twelve camera inward-looking VSN, using only a single image per camera. Results from the calibration are compared for nominal and measured dimensions of the target.