High-speed projector and its applications

Abstract

We have developed a high-speed and low-latency projector DynaFlash that can display 8bit black and white images at up to 1,000fps with 3ms delay. Recently we have also developed a high-speed projector DynaFlash v2 that can display 8bit color images at 947fps. These projectors use DMDs and time domain modulation of high-brightness LEDs. In addition, a newly designed communication interface module is installed in a computer for transferring images at high speed. This reduced the delay from image generation to projection to 3ms at best. On the other hand, we developed 1,000fps highspeed image processing that can recognize three dimensional shape and center position of moving objects every 1ms. A combination of the high-speed projector and a high-speed visual tracking system based on the high-speed vision realizes a dynamic projection mapping (DPM) system that can make a realistic projection mapping onto a moving object by using usual 60fps projector. As the high-speed vision can recognize three dimensional shapes of flexible objects every 1ms, so we can calculate appropriate projection images from photos or movies based on the three dimensional shape and position of objects. The high-speed projector displays them onto deformable objects such as T-shirts, even if the shape of objects changes quickly. In this paper, basic architectures of those systems and devices will be explained. In addition, application systems of highspeed projectors including DPM will be also shown.