IntegralImage.h

#ifndef INTEGRAL_IMAGE_HEADER
#define INTEGRAL_IMAGE_HEADER

#include "GlobalHeader.h"
#include "Geometry.h"

class IntegralImage {
public:
    IntegralImage(const cv::Mat &img);
    IntegralImage(int w, int h) : width(w), height(h) {}
    virtual ~IntegralImage();

    // Calculate the integral image.
    // Should be called before GetSum.
    virtual void CalculateInt(const cv::Mat &img) = 0;

    virtual void Dump(const char *filename) const { return; }

    virtual unsigned int GetSum(const Rect &roi) const { return 0; }

    // Used in HoG integral image.
    virtual void GetSum(const Rect &roi, float *result) const {}

    int width, height;
};


#endif