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MANIPULATION DETECTION APPARATUS, MANIPULATION DETECTION METHOD, AND PROJECTOR

  • US 20140253512A1
  • Filed: 02/04/2014
  • Published: 09/11/2014
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A manipulation detection apparatus to detect manipulation by a user'"'"'s finger with reference to a manipulation surface, comprising:

  • first and second light sources to radiate illumination light to the manipulation surface from different positions;

    a camera to capture the manipulation surface radiated by the illumination light as well as the user'"'"'s finger;

    a shadow region extraction portion that extracts first and second shadows caused by the first and second light sources corresponding to the user'"'"'s finger based on an image captured by the camera; and

    a manipulation state detection portion that detects at least one of manipulation states such as an approach degree, a contact point, and a direction indicated by the user'"'"'s finger with reference to the manipulation surface from shapes of the extracted first and second shadows.

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