Multiprojector tiled display wall calibration with a camera
Chao Li, Hai Bo Lin, Jiaoying Shi · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2005
Recent developments in computer graphics hardware and distributed parallel rendering research have greatly improved the rendering capabilities of graphics workstations and PC clusters. However, the display resolution of monitors is still far from being enough, and thus become the bottleneck of visualization. Recently, more and more people are focusing on using multiple projectors to form a large display wall and provide high display resolutions. One essential problem of these kinds of systems is how to calibrate the projectors and make the whole display wall seamless and perfect. Traditional software calibration algorithms have three main problems: re-rendering and over illumination in overlapping regions, calibration being not general. In this paper, we introduce our multi-projector tiled display wall calibration system using a digital camera which mainly focuses on solving these three problems. For the first two, we make specific divisions to the overlapping regions basing on our dividing algorithms and each projector project only part of the overlapping images. Furthermore, we make some sub-division to each part and make the mosaic seamless. And for the last problem, we adopt the idea of the open source software VNC, and implement our calibration on the layer of Windows desktop, thus make the calibration process application independent.