Abstract
We propose a method to increase image resolution of an autostereoscopic display without increasing the density of micro lenses. Multiple projectors are used for multiple real images to be laid on a surface in the air behind a light deflecting device. The overlaid multiple projection images yield light spots inside the region of a micro lens. This property provides scalable high resolution image by increasing the number of projectors. We describe some characteristic aspects of the calibration method that plays central role in such a projector based display system.