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Method and apparatus for detecting and measuring conditions affecting color

  • US 5,671,735 A
  • Filed: 05/09/1994
  • Issued: 09/30/1997
  • Est. Priority Date: 07/18/1983
  • Status: Expired due to Fees
First Claim
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1. A process of detecting a condition in a test subject, which condition includes a symptomatic, detectable change in the test subject'"'"'s coloration, the process comprising the steps of:

  • (a) at a first point in time, measuring with a color measuring instrument a value of at least one color factor in the test subject'"'"'s coloration, said color factor being dependent, at least in part, on relative content of one or more colors in said coloration,(b) waiting an interval,(c) measuring with the color measuring instrument, at least at one further point in time, a value of said color factor in the test subject'"'"'s coloration, and(d) comparing the values of said color factor measured at said first and said further point in time to determine whether there has been exhibited a change therein of a predetermined magnitude evidencing said condition, andwherein each of steps (a) and (c) comprises measuring the value of a color factor that is dependent on relative content of opponent colors in said coloration and on lightness of said coloration.

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