Projector-based three dimensional graphics
Ramesh Raskar, Henry Fuchs, Greg Welch · 2002
Light projectors can be arranged into electronic displays that offer large, bright, and high resolution images. However, despite their unique characteristics, projectors have been treated like any other two-dimensional display devices, e.g. CRT monitors or LCD panels, to create flat and usually rectangular images. Even the growth of three dimensional computer graphics has followed this limitation. To improve and widen the range of applications of projectors, in this dissertation I present a single unified geometric framework for projector-based graphics. It is based on the notion of the projector as the dual of a camera. The geometric framework is based on (i) the analytical projection model, (ii) the geometric representation of the display surface and (iii) the viewer location. The framework can be used for practically all the projector-based applications. For classic projectorbased systems, such as tiled displays or immersive panoramic displays, the framework provides a fundamentally different approach that allows greater freedom and flexibility. In addition, it enables a new class of projector-based visualization methods.