Abstract
We have developed a high-frame-rate LED display. Full-color images with high brightness are refreshed at 480 frames per second. In order to transmit such a high framerate signal via conventional 120-Hz DVI, we have introduced a spatiotemporal mapping for its signal input. Four adjacent pixels in each frame in DIV signal are converted into successive four fields. This spatiotemporal mapping improves perceived image quality for stereoscopic display and also enables us to implement a kind of steganography. The developed 480-fps LED display was utilized for stereoscopic 3D display without glasses and image interpolation has been demonstrated. Furthermore, the developed high-frame-rate LED display has been utilized for a new signage technique based on a spatiotemporal steganography. A text is hidden in successive frames so that it is unnoticeable because we cannot distinguish high frame rate images. The hidden text can be decoded by viewing through a waving hand.
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