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Apparatus and method for measuring the quality of an extracted signal

  • US 10,667,704 B2
  • Filed: 12/23/2016
  • Issued: 06/02/2020
  • Est. Priority Date: 12/23/2015
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a signal extractor, wherein the signal extractor is configured to receive a sequence of image frames of at least an area of interest of a subject, and to extract a signal representative of a physiological characteristic of the subject from a plurality of the image frames;

    a signal analyzer, wherein the signal analyzer is configured to calculate a plurality of physiological information results from the signal using a plurality of calculation functions, wherein the plurality of calculation functions are included in a list of calculation functions, wherein the physiological information results are calculated using different calculation functions than each other, anda quality metric calculator, wherein the quality metric calculator is configured to calculate a quality metric value for the physiological information results based on a signal analysis metric derived from a comparison between the physiological information results,wherein the list of calculation functions comprises;

    an autocorrelation function, a Fourier transform function, a power spectral density function, and a Laplace transform.

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