Calibrating Scalable Multi-Projector Displays Using Camera Homography Trees
Han Chen, Rahul Sukthankar, Grant Wallace, Tat‐Jen Cham · 2001
We present a practical vision-based calibration system for large format multi-projector displays. A spanning tree of homographies, automatically constructed from several camera images, accurately registers arbitrarily-mounted projectors to a global reference frame. Experiments on the 18'#8' Princeton Display Wall (a 24 projector array with 6000#3000 resolution) demonstrate that our algorithm achieves sub-pixel accuracy even on large display surfaces. A direct comparison with the previous best algorithm shows that our technique is significantly more accurate, requires far fewer camera images, and runs faster by an order of magnitude.