my_hog.h

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#ifndef my_hog_h_DEFINED
#define my_hog_h_DEFINED

#include <opencv2/core/core.hpp>
#include <opencv2/objdetect/objdetect.hpp>
#include "abstract_feature.h"
#include <vector>
#include <iostream>

namespace cpl_visual_features
{
template <int win_width, int win_height, int block_width, int block_height,
          int x_stride, int y_stride, int cell_width, int cell_height,
          int nbins> class MyHOG
    : public AbstractFeature<std::vector<float> >
{
 public:
  MyHOG() : hog_(cv::Size(win_width, win_height),
                 cv::Size(block_width, block_height),
                 cv::Size(x_stride, y_stride),
                 cv::Size(cell_width, cell_height),
                 nbins)
  {
  }

  virtual void operator()(cv::Mat& img, cv::Rect& window)
  {
    std::vector<float> descriptors;
    if (cv::Rect() == window)
    {
        hog_.compute(img, descriptors);
        std::cout << "Computing HOG on entire image" << std::endl;
    }
    else
    {
      cv::Size win_stride(window.width, window.height);
      cv::Point location(window.x, window.y);
      std::vector<cv::Point> locations(1,location);
      hog_.compute(img, descriptors, win_stride, cv::Size(), locations);
    }

    descriptor_ = descriptors;
  }

  virtual std::vector<float> getDescriptor() const
  {
    return descriptor_;
  }

 public:
  cv::HOGDescriptor hog_;

 protected:
  std::vector<float> descriptor_;
};
}
#endif // my_hog_h_DEFINED