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US 11,238,304 B2Granted
System and method for biometric identification
AssigneeQuantum Rgb Ltd.
InventorHenia Veksler
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for generating a biometric signature of a subject comprising: obtaining a plurality of sequential video frame images of a moving subject from a video segment; obtaining a portion of each frame comprising a surrounding of the moving subject; carrying out a transformation function to the frequency domain on one or more of said portions of the frames comprising a surrounding of a of the subject; and optionally saving the spectral characteristics of said transformation function in a repository. The present invention also relates to a system for carrying out said method.
Claims19
A method for generating a biometric signature of a subject comprising:
- obtaining a plurality of sequential video frame images of a moving subject from a video segment;
- obtaining a portion of each frame comprising a surrounding of the moving subject;
- wherein obtaining the portion of each frame comprising the surrounding of the moving subject comprises:
- obtaining foreground frames corresponding to the plurality of sequential video frames, each comprising the moving subject;
- generating a vector representing the direction of the moving subject;
- determining a Region Of Interest (ROI) at a position in relation to said vector;
- wherein determining the Region Of Interest (ROI) at a position in relation to said vector comprises:
- a. obtaining a plurality of background sequential video frames being a sequence of frames comprising the background of the plurality of sequential video frame images;
- b. integrating the vector determined in each background frame;
- c. determining an initial ROI on each background frame being at a predetermined corresponding position from said vector;
- d. carrying out a transformation function to the frequency domain in time to the ROI portions of said background frames obtaining spectral characteristics and determining the stability frequencies from said spectral characteristics;
- e. integrating each of the plurality of sequential video frame images with said initial ROI determined and carrying out a transformation function to the frequency domain in time to the initial ROI portion of said sequential video frames thus obtaining spectral characteristics and storing the sensitivity of said stability frequencies of said spectral characteristics of the initial ROI;
- f. shifting the initial ROI to a surrounding area in each of the plurality of sequential video frame images, and carrying out a transformation function to the frequency domain in time to the currently shifted ROI portion of said sequential video frames thus obtaining spectral characteristics and storing the sensitivity of said stability frequencies of said spectral characteristics of the currently shifted ROI;
- g. repeating the shifting step f for all sequences according to a predetermined shifting rule;
- h. after step f has been repeated for all sequences of the shifting rule determining the ROI of the initial and shifted ROIs with the highest sensitivity stored as the ROI;
- and
- determining said portion of each frame comprising the surrounding of the moving subject, at a location on each frame corresponding to the location of said determined ROI;
- carrying out a transformation function to the frequency domain on one or more of said portions of the frames comprising the surrounding of the moving subject;
- and
- saving said spectral characteristics of said transformation function in a repository.
17 more elements
A system comprising one or more cameras connected to processing means, wherein the processing means comprise:
- A) a database;
- B) a transformation to frequency domain module;
- C) a comparing frequency coherence function module;
- wherein the processing means are configured to generate a biometric signature of a subject comprising the steps of:
- obtaining a plurality of sequential video frame images of a moving subject from a video segment;
- obtaining a portion of each frame comprising a surrounding of the moving subject;
- wherein obtaining the portion of each frame comprising the surrounding of the moving subject comprises:
- obtaining foreground frames corresponding to the plurality of sequential video frames, each comprising the moving subject;
- generating a vector representing the direction of the moving subject;
- determining a Region Of Interest (ROI) at a position in relation to said vector;
- wherein determining the Region Of Interest (ROI) at a position in relation to said vector comprises:
- a. obtaining a plurality of background sequential video frames being a sequence of frames comprising the background of the plurality of sequential video frame images;
- b. integrating the vector determined in each background frame;
- c. determining an initial ROI on each background frame being at a redetermined corresponding position from said vector;
- d. carrying out a transformation function to the frequency domain in time to the ROI portions of said background frames obtaining spectral characteristics and determining the stability frequencies from said spectral characteristics;
- e. integrating each of the plurality of sequential video frame images with said initial ROI determined and carrying out a transformation function to the frequency domain in time to the initial ROI portion of said sequential video frames thus obtaining spectral characteristics and storing the sensitivity of said stability frequencies of said spectral characteristics of the initial ROI;
- f. shifting the initial ROI to a surrounding area in each of the plurality of sequential video frame images, and carrying out a transformation function to the frequency domain in time to the currently shifted ROI portion of said sequential video frames thus obtaining spectral characteristics and storing the sensitivity of said stability frequencies of said spectral characteristics of the currently shifted ROI;
- g. repeating the shifting step f for all sequences according to a predetermined shifting rule;
- h. after step f has been repeated for all sequences of the shifting rule determining the ROI of the initial and shifted ROIs with the highest sensitivity stored as the ROI;
- and
- determining said portion of each frame comprising the surrounding of the moving subject, at a location on each frame corresponding to the location of said determined ROI;
- carrying out a transformation function to the frequency domain on one or more of said portions of the frames comprising the surrounding of the moving subject;
- and
- saving the spectral characteristics of said transformation function in a repository.
21 more elements
A method for generating a biometric signature of a subject comprising:
- obtaining a plurality of sequential video frame images of a moving subject from a video segment;
- obtaining a portion of each frame comprising a surrounding of the moving subject;
- wherein obtaining the portion of each frame comprising the surrounding of the moving subject comprises:
- obtaining foreground frames corresponding to the plurality of sequential video frames, each comprising the moving subject;
- generating a vector representing the direction of the moving subject;
- wherein generating the vector representing the direction of the moving subject comprises:
- obtaining body portions of the foreground objects of the foreground frames;
- wherein the body portions are one or more of:
- a head portion;
- a center body portion;
- or
- a feet portion;
- obtaining reference point frames corresponding to the foreground frames, each comprising a reference point about or at an edge of the corresponding location of said body portions;
- combining all the reference points frames into a three-dimensional coordinate system frame comprising all the reference points being at their corresponding location on the three-dimensional coordinate system frame;
- determining a vector in the three-dimensional coordinate system frame according to a sequence of a number of reference points from the reference points, that produce the most stable vector;
- determining a Region Of Interest (ROI) at a position in relation to said vector;
- and
- determining said portion of each frame comprising the surrounding of the moving subject, at a location on each frame corresponding to the location of said determined ROI;
- carrying out a transformation function to the frequency domain on one or more of said portions of the frames comprising the surrounding of the moving subject;
- and
- saving the spectral characteristics of said transformation function in a repository.
18 more elements
Dependencies are inferred from the claim text.