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COMPENSATING FOR MOTION DURING REAL-TIME BATCH PROCESSING OF VIDEO FOR PHYSIOLOGICAL FUNCTION ASSESSMENT

  • US 20150262338A1
  • Filed: 03/14/2014
  • Published: 09/17/2015
  • Est. Priority Date: 03/14/2014
  • Status: Active Grant
First Claim
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1. A method for compensating for motion during processing of a video of a subject being monitored for a physiological function, the method comprising:

  • receiving image frames of a video captured by a video imaging device of a subject being monitored for a desired physiological function, said image frames being acquired of at least a portion of a body region of said subject where a physiological signal corresponding to said physiological function is registered by said video imaging device used to capture said video;

    defining an initial size N of a batch of image frames for processing such that Nmin

    N≦

    Nmax, where Nmin is a minimum size of a batch of image frames and Nmax is a maximum size of a batch of image frames;

    defining a number of frames M1 by which a size of a given batch of image frames is to be increased, and a number of frames M2 by which a size of a given batch of image frames is to be decreased, where M1, M2

    1; and

    for each successive batch of image frames of size N;

    processing the current batch of image frames to isolate pixels associated with said body region;

    processing said isolated pixels to obtain a time-series signal for this batch;

    determining whether a movement occurred during video acquisition of this batch of image frames; and

    in response to said movement exceeding a threshold level, adjusting a size of a next batch of image frames to;

    N=N+M1, where N+M1

    Nmax, otherwise adjusting a size of a next batch of image frames to;

    N=N−

    M2, where N−

    M2

    Nmin.

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