Calibrating a camera network using a domino grid

This work considers the problem of calibrating a distributed multi-camera system. As opposed to traditional multi-camera systems, such as stereo heads, in a distributed network the "elds-of-view do not all overlap. Our novel method uses a grid of domino calibration targets. We also describe a novel grid-"nding algorithm, to expedite the location of image-to-world correspondences. Experiments conducted in a hallway and two connecting rooms, using 12 cameras, demonstrate accuracies of 4.3 mm in world coordinates and 0.28 pixels in image coordinates. ( 2001 Published by Elsevier Science Ltd on behalf of Pattern Recognition Society.