Automatic Projector Calibration Using Self-Identifying Patterns Mark Fiala Computational Video Group Institute of Information Technology National Research.

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Automatic Projector Calibration Using Self-Identifying Patterns Mark Fiala Computational Video Group Institute of Information Technology National Research Council

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

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

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

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

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