Within a matrix of cooperating projectors a hybrid solution, containing both active and passive calibration elements, is essential for achieving automatic and continuous geometric rectification and color uniformity. We propose a method whereby projected structured light is utilized off-line to rapidly calibrate both the geometry and the color uniformity. Calibration camera(s) monitoring the projection surface provide visual feedback and allow a closed loop solution. The video feed of the projector provides a reference against which images, captured by the calibration camera(s), are compared to provide information for passive, on-line geometry and color drift assessment and correction. Detection of significant geometry or color errors either during setup or normal operation will trigger an active, off-line calibration procedure.
Keywords: Intelligent Projectors, Tiled Displays, Large Venue Displays, Deployable Displays, Integrated Sensing, Automatic & Continuous Calibration
