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Color identification in images

  • US 10,692,245 B2
  • Filed: 06/28/2018
  • Issued: 06/23/2020
  • Est. Priority Date: 07/11/2017
  • Status: Active Grant
First Claim
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1. A method for identifying colors within an image of a sample, the method comprising:

  • capturing, using an imaging device, an image of the sample and of a reference-color chart wherein the reference-color chart includes a plurality of color reference elements;

    extracting from the captured image using a processor having memory configured by program code executed thereby, the RGB values of the pixels depicting the sample color and one or more of the plurality of color reference elements color values,accessing, using the processor, a plurality of known illuminant color datasets, where each of the plurality of known color datasets includes one or more color values of the color reference chart obtained under a known illuminant;

    comparing, using the processor, the color values of pixels representing the reference-color chart of the captured image to the pixel values corresponding to the color reference chart elements in each entry of each of the plurality of known illuminant color datasets;

    identifying, using the processor, the known illuminant color dataset having the smallest difference in color values between the color reference chart referenced in the sample image and the color values of the color reference chart referenced in the one or more entries of the one or more known illuminant color datasets;

    comparing, using the processor, the color values of the pixels representing the color sample of the sample image to the color sample of each entry in the identified known illuminant color dataset;

    locating, using the processor, an entry of the identified smallest distance known illuminant color dataset having the smallest difference in color values with the color sample of the sample image; and

    outputting the name of the identified color sample.

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