The growing need for high-frame-rate projectors in the fields of dynamic projection mapping and 3D displays has increased. Conventional methods allow for an increase in the frame rate to as much as 2,841 frames per second (fps) for 8-bit image projection, using digital light processing (DLP) technology when the minimum digital mirror device (DMD) control time is 44 us. However, this rate needs to be further augmented to suit specific applications.
In this study, we developed a novel high-frame-rate projection method, which divides the bit depth of an image among multiple projectors and simultaneously projects them in synchronization. The simultaneously projected bit images are superimposed such that a high-bit-depth image is generated within a reduced single-frame duration. Additionally, we devised an optimization process to determine the system parameters necessary for attaining maximum brightness.
We constructed a prototype system utilizing two high-frame-rate projectors and validated the feasibility of using our system to project 8-bit images at a rate of 5,600 fps. Furthermore, the quality assessment of our projected image exhibited superior performance in comparison to a dithered image.
- Soran Nakagawa and Yoshihiro Watanabe: High-Frame-Rate Projection with Thousands of Frames Per Second Based on the Multi-Bit Superimposition Method, IEEE International Symposium on Mixed and Augmented Reality (ISMAR), 2023. [Paper]