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Volume 33 Issue 12
Dec.  2007
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Journal of Beijing University of Aeronautics and Astronautics  > 2007  >  33(12): 1444-1447.
Peng Junyi, Chen Huan, Dai Shulinget al. Automatic geometry alignment for muti-projector image display wall[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(12): 1444-1447. (in Chinese)
Citation: Peng Junyi, Chen Huan, Dai Shulinget al. Automatic geometry alignment for muti-projector image display wall[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(12): 1444-1447. (in Chinese)
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Automatic geometry alignment for muti-projector image display wall

  • School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 05 Dec 2006
  • Publish Date: 31 Dec 2007
    Abstract
  • A practical and scalable alignment automation system for muti-projector display wall was constructed based on the measurement of low-performance cameras. Taking the advantage of re-alignment theory the homography matrix was refined and used to achieve seamless alignment across different areas on the projection screen. The special pattern for feature extraction and the re-alignment idea furthest decreased the effect of the cameras- performances on the alignment precision. The system can automatically align the projectors under the conditions that there are overlapped view areas between adjacent projectors and cameras can observe them. It is shown in the experiments that the re-alignment method obviously shortens the calibration period and brings us sub-pixel alignment precision. The low-performance cameras, high efficient feature extraction method and sophisticated solution for homography make the cost of expanding the system low.

     

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    • References(1)
  • [1] Yang R, Gotz D, Hensley J, et al. PixelFlex: a reconfigurable multi-projector display system Proceedings of IEEE Visualization, 2001.http://www.vis.uky. edu/ryang/publications/yang01-Vis.pdf [2] Chen H, Sukthankar R, Wallace G, et al. Scalable alignment of large-format multi-projector displays using camera homography trees IEEE Visualization (Vis2002), October 2002. http://citeseer.ist.psu.edu/600437.html [3] Zhang Z. Flexible camera calibration by viewing a plane from unknown orientations Proceedings of International Conference on Computer Vision. 1999 [4] Sukthankar R, Stockton R, Mullin M. Smarter presentations: exploiting homography in camera-projector systems // Proceedings of International Conference on Computer Vision, 2001.http://www.cs.cmu.edu/~rahuls/pub/iccv2001-rahuls.pdf [5] Raskar R, Jeroen B, Chai J. A low-cost projector mosaic with fast registration . Technical Report TR-2002-14, Mitsubishi Electric Research Laboratories, 2002.http://citeseer.ist.psu.edu/raskar02lowcost.html [6] Wallace G, Chen H, Li K. DeskAlign: automatically aligning a tiled windows desktop Proceedings of the IEEE International Workshop on PROCAMS, 2003.http://www.fusiongrid.org/research/papers/wallace-jos2005.pdf
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