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Vision-based interactive projection system

  • US 9,030,445 B2
  • Filed: 10/04/2012
  • Issued: 05/12/2015
  • Est. Priority Date: 10/07/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • projecting a display onto a surface;

    illuminating a region near the surface during a plurality of different time periods;

    capturing a plurality of images of the surface during the plurality of different time periods;

    analyzing a variation of intensities of pixels in a same area across the plurality of images;

    determining a change in polarity between the plurality of images the polarity indicating whether the area is associated with a predetermined intensity value; and

    determining whether an object is touching the surface based at least partly on the analysis of the variation and on the determined change in polarity.

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