【计算机视觉】KCF算法

 

code

opencv3.3.1-contrib  ---- TrackerKCF.cpp

opencv如何更新目标区域的过程：

      // calculate filter response
      if(params.split_coeff)
        calcResponse(alphaf,alphaf_den,kf,response, spec, spec2);
      else
        calcResponse(alphaf,kf,response, spec);

      // extract the maximum response
      minMaxLoc( response, &minVal, &maxVal, &minLoc, &maxLoc );
      if (maxVal < params.detect_thresh)
      {
          return false;
      }
      roi.x+=(maxLoc.x-roi.width/2+1);
      roi.y+=(maxLoc.y-roi.height/2+1);

    // update the bounding box
    boundingBox.x=(resizeImage?roi.x*2:roi.x)+(resizeImage?roi.width*2:roi.width)/4;
    boundingBox.y=(resizeImage?roi.y*2:roi.y)+(resizeImage?roi.height*2:roi.height)/4;
    boundingBox.width = (resizeImage?roi.width*2:roi.width)/2;
    boundingBox.height = (resizeImage?roi.height*2:roi.height)/2;

 

参考

1. KCFcpp;

2. opencv_contrib;

3. 作者Homepage;

完