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Fast motion rendering for single-chip stereo DLP projectors

: Lancelle, Marcel


Boulic, R.; Cruz-Neira, Carolina (Ed.); Kiyokawa, Kiyoshi (Ed.); Roberts, David (Ed.) ; European Association for Computer Graphics -EUROGRAPHICS-:
Virtual Environments 2012. Joint Virtual Reality Conference of ICAT - EGVE - EuroVR : 18th Eurographics Symposium on Virtual Environments, the 9th EuroVR Conference, and the 22nd International Conference on Artificial Reality and Teleexistence (ICAT), Madrid, Spain, 17-19 October 2012
Goslar: Eurographics Association, 2012
ISBN: 978-3-905674-40-8
Joint Virtual Reality Conference (JVRC) <4, 2012, Madrid>
International Conference on Artificial Reality and Teleexistence (ICAT) <22, 2012, Madrid>
Symposium on Virtual Environments <18, 2012, Madrid>
EuroVR Conference <9, 2012, Madrid>
Fraunhofer IGD ()
image generation; display algorithm; Business Field: Digital society; Research Area: Confluence of graphics and vision

Single-chip color DLP projectors show the red, green and blue components one after another. When the gaze moves relative to the displayed pixels, color fringes are perceived. In order to reduce these artefacts, many devices show the same input image twice at the double rate, i.e. a 60Hz source image is displayed with 120Hz. Consumer stereo projectors usually work with time interlaced stereo, allowing to address each of these two images individually. We use this so called 3D mode for mono image display of fast moving objects. Additionally, we generate a separate image for each individual color, taking the display time offset of each color component into account. With these 360 images per second we can strongly reduce ghosting, color fringes and jitter artefacts on fast moving objects tracked by the eye, resulting in sharp objects with smooth motion. Real-time image generation at such a high frame rate can only be achieved for simple scenes or may only be possible by severely reducing quality. We show how to modify a motion blur post processing shader to render only 60frames=second and efficiently generate good approximations of the missing frames.