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CHARACTERIZATION OF FOOD MATERIALS BY OPTOMAGNETIC FINGERPRINTING

  • US 20120321759A1
  • Filed: 05/18/2012
  • Published: 12/20/2012
  • Est. Priority Date: 01/05/2007
  • Status: Abandoned Application
First Claim
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1. A method for checking food quality, the method comprising:

  • determining an opto-magnetic fingerprint of a food material in a first state based on opto-magnetic properties of light reflected and refracted from the food material, wherein determining comprises;

    capturing an image of the food material illuminated with diffuse white (W) light and an image in reflected white polarized light (P), wherein W and P are from the same light source;

    generating a normalized red and a normalized blue color channel histogram for at least one of a reflected and refracted light in each image;

    correlating the normalized red and normalized blue color channel histograms to a wavelength scale to obtain red and blue color channel spectral plots; and

    combining the red and blue color channel spectral plots by subtracting a spectral plot for polarized light from a spectral plot for diffuse light for each color channel to generate red and blue normalized, composite color channel spectral plots of a specific wavelength scale and subtracting the normalized, composite blue channel spectral plot from the normalized, composite red channel spectral plot to generate a red-minus-blue (R−

    B)W spectral signature for the food material.

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