QR Codes on Curved Media Facades - Two Approaches for Inverse Distortion based on Raytracing and Image Warping

Morin Ostkamp, Sven Luzar, Gernot Bauer

2014

Abstract

Media facades and other public displays are a common sight in our everyday life. They can be found at various places, such as shopping malls or traffic hubs, e.g., the Times Square in New York City or Shibuya Crossing in Tokyo. Thanks to advances in technology, media facades are not bound to plane, rectangular shapes. Thus, many media facades are curved to increase their visual appearance or to better harmonize with the building behind. One example of such a curved media facade is the “Medienfassade” in the city of Münster. The shown content, however, is visually distorted due to the facade’s concave shape. That visual distortion may cause problems for certain types of content, i.e., QR codes, that may thus not be scanned with mobile apps. Since QR codes became popular in recent years, it appears desirable to display these codes on curved media facades, too. Thus, we propose two preprocessing approaches to compensate for the visual distortions of the curved media facade. An in-situ evaluation showed that both approaches can be used to “rectify” the distorted QR codes and let them be scanned successfully.

References

  1. Appel, A. (1968). Some techniques for shading machine renderings of solids. In Proc. AFIPS 7868, pages 37- 45. ACM.
  2. Chuang, Y.-M., Hsu, S.-P., Huang, K.-C., Chang, Y.-C., and Ruan, S.-H. (2010). Implementation of image warping with application to projection onto a curved display. In Proc. ICIEA 7810, pages 404-408.
  3. Denso (2000). Information technology - automatic identification and data capture techniques - qr code 2005 bar code symbology specification. Technical Report ISO/IEC 18004:2006, International Organization for Standardization.
  4. Denso (2013). Qr code standardization. www.densoadc.com/dl/1, accessed: 31.10.2013.
  5. Glassner, A. S., editor (1989). An introduction to ray tracing. Academic Press Ltd., London, UK.
  6. Harville, M., Culbertson, B., Sobel, I., Gelb, D., Fitzhugh, A., and Tanguay, D. (2006). Practical methods for geometric and photometric correction of tiled projector. In Proc. CVPRW 7806, pages 5-5.
  7. Liang, J., DeMenthon, D., and Doermann, D. (2005). Flattening curved documents in images. In Proc. CVPR 7805, volume 2, pages 338-345.
  8. Lin, D.-T. and Huang, H. (1999). Facial expression morphing and animation with local warping methods. In Proc. ICIAP 7899, pages 594-599.
  9. Meng, G., Pan, C., Xiang, S., Duan, J., and Zheng, N. (2012). Metric rectification of curved document images. IEEE Transactions on Pattern Analysis and Machine Intelligence, 34(4):707-722.
  10. Raskar, R., van Baar, J., Beardsley, P., Willwacher, T., Rao, S., and Forlines, C. (2005). ilamps: geometrically aware and self-configuring projectors. In SIGGRAPH 7805 Courses. ACM.
  11. Schaeffler, J. (2008). Digital Signage: Software, Networks, Advertising, and Displays: A Primer for Understanding the Business. Focal Press, 1 edition.
  12. Whitaker, R. T. (2009). Geometric transformations and image warping. University of Utah, CS6640, www.coe.utah.edu/ cs6640/geometric trans.pdf (2013/06/12).
  13. Wolberg, G. (1996). Recent advances in image morphing. In Proc. CGI 7896, pages 64-71.
  14. Zhang, Z. and Tan, C. (2002). Straightening warped text lines using polynomial regression. In Proc. Image Processing 7802, volume 3, pages 977-980.
Download


Paper Citation


in Harvard Style

Ostkamp M., Luzar S. and Bauer G. (2014). QR Codes on Curved Media Facades - Two Approaches for Inverse Distortion based on Raytracing and Image Warping . In Proceedings of the 9th International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2014) ISBN 978-989-758-002-4, pages 424-429. DOI: 10.5220/0004655904240429


in Bibtex Style

@conference{grapp14,
author={Morin Ostkamp and Sven Luzar and Gernot Bauer},
title={QR Codes on Curved Media Facades - Two Approaches for Inverse Distortion based on Raytracing and Image Warping},
booktitle={Proceedings of the 9th International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2014)},
year={2014},
pages={424-429},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004655904240429},
isbn={978-989-758-002-4},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 9th International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2014)
TI - QR Codes on Curved Media Facades - Two Approaches for Inverse Distortion based on Raytracing and Image Warping
SN - 978-989-758-002-4
AU - Ostkamp M.
AU - Luzar S.
AU - Bauer G.
PY - 2014
SP - 424
EP - 429
DO - 10.5220/0004655904240429