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VEHICLE DETECTION METHOD BASED ON HYBRID IMAGE TEMPLATE

  • US 20160259981A1
  • Filed: 06/28/2013
  • Published: 09/08/2016
  • Est. Priority Date: 06/28/2013
  • Status: Active Grant
First Claim
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1. A vehicle detection method based on hybrid image template HIT, comprising the following steps:

  • Step S1;

    no less than one vehicle image is collected as a training image;

    Step S2;

    an information projection algorithm is utilized to learn all of image patches in the HIT for representing vehicle object from the training images and to compute image likelihood probability distribution of this hybrid image template;

    Step S3;

    the HIT learned from the step S2 is applied to detect vehicles from the input testing image and then to acquire the position of vehicles in the testing images;

    the Step S3 further comprising the following sub-steps;

    Step S31;

    based on the HIT, the summation-maximization SUM-MAX operation is used to detect vehicle candidates with the maximum score from the input testing image, the Step S31 further comprising the following sub-steps;

    Step S311;

    a Gabor wavelets with no less than one orientation are utilized to filter the testing image, and then the sketch patches with these orientations are acquired;

    Step S312;

    the local maximization operation is applied to the sketch image to get a revised sketch imageStep S313;

    the image patches in the HIT is used to filter the testing image and to detect vehicle patch candidates;

    Step S3-1-4;

    the local maximization operation is applied to the obtained vehicle patch candidates to get the revised vehicle patch candidates;

    Step S3-1-5;

    the revised vehicle patch candidates are merged according to their relative positions and scales in the HIT, and one or more vehicle candidate regions are generated from the testing image;

    Step 3-1-6;

    the patches in the HIT and the image likelihood probability are used to compute vehicle detection scores of the vehicle candidates region;

    Step S3-1-7;

    the vehicle candidate regions with the maximum vehicle detection scores is selected from all of the vehicle candidate regions; and

    Step S32;

    the maximum vehicle detection score is compared with a predefined vehicle detection threshold for detecting a vehicle object, and an iterative method is utilized to get all of vehicle objects in the testing image.

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