1. Automatic Projector Calibration Using Self-Identifying Patterns Mark Fiala Computational Video Group Institute of Information Technology National Research Council mark.fiala@nrc-cnrc.gc.ca

2. Problem: Geometrically and Photometrically calibrate multiple projector array Application: large arrays of projector or monitor display elements

3. Solution: Use ARTag self-identifying markers to find correspondence points Locate white and black points for photometric calibration ARTag markers

4. ARTag patterns displayed at multiple resolutions from each display element (projector/monitor) Locate corner points for geometric calibration

5. ARTag Fiducial Marker System bi-tonal (only black and white) 4 corners: for 6-DOF camera/pattern pose determination Digital Methods: Error Correction, CRC-16 Checksum

6. ARTag Creating Markers: Encoding codes Detecting Markers: Identification and decoding 2002 possible markers