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A Privacy-protection Device Using a Directional Backlight and Facial Recognition

  • Lee, Hyeontaek (Department of Physics and Astronomy, Sejong University) ;
  • Kim, Hyunsoo (Department of Physics and Astronomy, Sejong University) ;
  • Choi, Hee-Jin (Department of Physics and Astronomy, Sejong University)
  • Received : 2020.09.02
  • Accepted : 2020.09.14
  • Published : 2020.10.25

Abstract

A novel privacy-protection device to prevent visual hacking is realized by using a directional backlight and facial recognition. The proposed method is able to overcome the limitations of previous privacy-protection methods that simply restrict the viewing angle to a narrow range. The accuracy of user tracking is accomplished by the combination of a time-of-flight sensor and facial recognition with no restriction of detection range. In addition, an experimental demonstration is provided to verify the proposed scheme.

Keywords

References

  1. P. Barker, "Visual hacking - why it matters and how to prevent it," Netw. Secur. 42, 14-17 (2019). https://doi.org/10.1016/S1353-4858(19)30085-6
  2. H. Yoon, S.-G. Oh, D. S. Kang, J. M. Parck, S. J. Choi, K. Y.Suh, K. Char, and H. H. Lee, "Arrays of Lucius microprisms for directional allocation of light and autostereoscopic three-dimensional displays," Nat. Commun. 2, 455 (2011). https://doi.org/10.1038/ncomms1456
  3. G. E. Gaides, I. A. Kadoma, D. B. Olson, R. A. Larson, and A. R. Sykora, "Light collimating film," U.S. Patent 8012567B2 (2011).
  4. J.-H. Kim, C. H. Lee, S. S. Lee, and K.-C. Lee, "Highly transparent privacy filter film with image distortion," Opt. Express 22, 29799-29804 (2014). https://doi.org/10.1364/OE.22.029799
  5. T. Guzvinecz, V. Szucs, and C. Sik-Lanyi, "Suitability of the Kinect Sensor and Leap Motion Controller-A Literature Review," Sensors 19, 1072 (2019). https://doi.org/10.3390/s19051072
  6. C. Kim, S. Yun, S-.W. Jung, and C. S. Won, "Color and depth image correspondence for Kinect v2," in Advanced Multimedia and Ubiquitous Engineering (Lecture Notes in Electrical Engineering Series, Vol. 352), J. H. Park, H.-C. Chao, H. Arabnia, and N. Y. Yen, eds. (Springer, Berlin, Heidelberg, Germany, 2015), pp. 111-116.
  7. H. Kwon and H.-J. Choi, "A time-sequential multi-view autostereoscopic display without resolution loss using a multidirectional backlight unit and an LCD panel," Proc. SPIE 8288, 82881Y (2012).
  8. S. G. de Groot and J. W. Gebhard, "Pupil size as determined by adapting luminance," J. Opt. Soc. Am. 42, 492-495 (1952). https://doi.org/10.1364/JOSA.42.000492