3 High-Resolution Interactive Displays

Tabletop displays are mostly used for casual applications that do not require intricate graphics or precise manipulation. Browsing photographs and maps are common applications. A higher resolution is required to support work involving detailed graphics and text. A display the size of a desk, with the resolution of a typical LCD monitor, will have around 14 megapixels. Tabletop displays are usually constructed from projectors, and the only way to achieve this size and resolution is to combine multiple projectors. We present techniques from multiprojector display walls and adapt them for tabletops. These high-resolution displays also require high-resolution input, and although touch is simple and natural, better accuracy can generally be achieved using a pen. We also review technologies for pen input on tabletops.