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Apparatus and method of monitoring a subject and providing feedback thereto

  • US 20040070509A1
  • Filed: 10/11/2002
  • Published: 04/15/2004
  • Est. Priority Date: 10/11/2002
  • Status: Active Grant
First Claim
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12. A method, comprising:

  • directing light having a first wavelength toward a subject;

    directing light having a second wavelength toward the subject, wherein the first wavelength does not equal the second wavelength;

    capturing a first image of light reflected by the subject having the first wavelength;

    capturing a second image of light reflected by the subject having the second wavelength;

    subtracting a signal indicative of the first image from a signal indicative of the second image and producing a third signal; and

    providing informational content to the subject in response to the third signal.

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