Auto-calibration for multi-projector 3D display

For typical multi-projector 3D display systems, precise calibration of projectors is extremely important for ensuring projected images/videos to coincide exactly in the same region of the screen to obtain high quality 3D display experience. Conventional calibration is achieved by adjusting the pose of projectors manually with the built-in keystone correction function, which is imprecise and time-consuming. In this paper, we propose an auto-calibration approach using feature detection and matching technique via an uncalibrated camera to improve both the calibration efficiency and precision. The whole procedure can be finished in minutes, and the calibration error also hardly increase with the number of projectors. What's more, to the best of our knowledge, our approach is the first fast auto-calibration approach employed in the multi-projector 3D display systems.