/usr/include/opencv2/stitching/detail/seam_finders.hpp is in libopencv-stitching-dev 2.4.9.1+dfsg1-2.
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#ifndef __OPENCV_STITCHING_SEAM_FINDERS_HPP__
#define __OPENCV_STITCHING_SEAM_FINDERS_HPP__
#include <set>
#include "opencv2/core/core.hpp"
#include "opencv2/core/gpumat.hpp"
namespace cv {
namespace detail {
class CV_EXPORTS SeamFinder
{
public:
virtual ~SeamFinder() {}
virtual void find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks) = 0;
};
class CV_EXPORTS NoSeamFinder : public SeamFinder
{
public:
void find(const std::vector<Mat>&, const std::vector<Point>&, std::vector<Mat>&) {}
};
class CV_EXPORTS PairwiseSeamFinder : public SeamFinder
{
public:
virtual void find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks);
protected:
void run();
virtual void findInPair(size_t first, size_t second, Rect roi) = 0;
std::vector<Mat> images_;
std::vector<Size> sizes_;
std::vector<Point> corners_;
std::vector<Mat> masks_;
};
class CV_EXPORTS VoronoiSeamFinder : public PairwiseSeamFinder
{
public:
virtual void find(const std::vector<Size> &size, const std::vector<Point> &corners,
std::vector<Mat> &masks);
private:
void findInPair(size_t first, size_t second, Rect roi);
};
class CV_EXPORTS DpSeamFinder : public SeamFinder
{
public:
enum CostFunction { COLOR, COLOR_GRAD };
DpSeamFinder(CostFunction costFunc = COLOR);
CostFunction costFunction() const { return costFunc_; }
void setCostFunction(CostFunction val) { costFunc_ = val; }
virtual void find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks);
private:
enum ComponentState
{
FIRST = 1, SECOND = 2, INTERS = 4,
INTERS_FIRST = INTERS | FIRST,
INTERS_SECOND = INTERS | SECOND
};
class ImagePairLess
{
public:
ImagePairLess(const std::vector<Mat> &images, const std::vector<Point> &corners)
: src_(&images[0]), corners_(&corners[0]) {}
bool operator() (const std::pair<size_t, size_t> &l, const std::pair<size_t, size_t> &r) const
{
Point c1 = corners_[l.first] + Point(src_[l.first].cols / 2, src_[l.first].rows / 2);
Point c2 = corners_[l.second] + Point(src_[l.second].cols / 2, src_[l.second].rows / 2);
int d1 = (c1 - c2).dot(c1 - c2);
c1 = corners_[r.first] + Point(src_[r.first].cols / 2, src_[r.first].rows / 2);
c2 = corners_[r.second] + Point(src_[r.second].cols / 2, src_[r.second].rows / 2);
int d2 = (c1 - c2).dot(c1 - c2);
return d1 < d2;
}
private:
const Mat *src_;
const Point *corners_;
};
class ClosePoints
{
public:
ClosePoints(int minDist) : minDist_(minDist) {}
bool operator() (const Point &p1, const Point &p2) const
{
int dist2 = (p1.x-p2.x) * (p1.x-p2.x) + (p1.y-p2.y) * (p1.y-p2.y);
return dist2 < minDist_ * minDist_;
}
private:
int minDist_;
};
void process(
const Mat &image1, const Mat &image2, Point tl1, Point tl2, Mat &mask1, Mat &mask2);
void findComponents();
void findEdges();
void resolveConflicts(
const Mat &image1, const Mat &image2, Point tl1, Point tl2, Mat &mask1, Mat &mask2);
void computeGradients(const Mat &image1, const Mat &image2);
bool hasOnlyOneNeighbor(int comp);
bool closeToContour(int y, int x, const Mat_<uchar> &contourMask);
bool getSeamTips(int comp1, int comp2, Point &p1, Point &p2);
void computeCosts(
const Mat &image1, const Mat &image2, Point tl1, Point tl2,
int comp, Mat_<float> &costV, Mat_<float> &costH);
bool estimateSeam(
const Mat &image1, const Mat &image2, Point tl1, Point tl2, int comp,
Point p1, Point p2, std::vector<Point> &seam, bool &isHorizontal);
void updateLabelsUsingSeam(
int comp1, int comp2, const std::vector<Point> &seam, bool isHorizontalSeam);
CostFunction costFunc_;
// processing images pair data
Point unionTl_, unionBr_;
Size unionSize_;
Mat_<uchar> mask1_, mask2_;
Mat_<uchar> contour1mask_, contour2mask_;
Mat_<float> gradx1_, grady1_;
Mat_<float> gradx2_, grady2_;
// components data
int ncomps_;
Mat_<int> labels_;
std::vector<ComponentState> states_;
std::vector<Point> tls_, brs_;
std::vector<std::vector<Point> > contours_;
std::set<std::pair<int, int> > edges_;
};
class CV_EXPORTS GraphCutSeamFinderBase
{
public:
enum { COST_COLOR, COST_COLOR_GRAD };
};
class CV_EXPORTS GraphCutSeamFinder : public GraphCutSeamFinderBase, public SeamFinder
{
public:
GraphCutSeamFinder(int cost_type = COST_COLOR_GRAD, float terminal_cost = 10000.f,
float bad_region_penalty = 1000.f);
~GraphCutSeamFinder();
void find(const std::vector<Mat> &src, const std::vector<Point> &corners,
std::vector<Mat> &masks);
private:
// To avoid GCGraph dependency
class Impl;
Ptr<PairwiseSeamFinder> impl_;
};
class CV_EXPORTS GraphCutSeamFinderGpu : public GraphCutSeamFinderBase, public PairwiseSeamFinder
{
public:
GraphCutSeamFinderGpu(int cost_type = COST_COLOR_GRAD, float terminal_cost = 10000.f,
float bad_region_penalty = 1000.f)
: cost_type_(cost_type), terminal_cost_(terminal_cost),
bad_region_penalty_(bad_region_penalty) {}
void find(const std::vector<cv::Mat> &src, const std::vector<cv::Point> &corners,
std::vector<cv::Mat> &masks);
void findInPair(size_t first, size_t second, Rect roi);
private:
void setGraphWeightsColor(const cv::Mat &img1, const cv::Mat &img2, const cv::Mat &mask1, const cv::Mat &mask2,
cv::Mat &terminals, cv::Mat &leftT, cv::Mat &rightT, cv::Mat &top, cv::Mat &bottom);
void setGraphWeightsColorGrad(const cv::Mat &img1, const cv::Mat &img2, const cv::Mat &dx1, const cv::Mat &dx2,
const cv::Mat &dy1, const cv::Mat &dy2, const cv::Mat &mask1, const cv::Mat &mask2,
cv::Mat &terminals, cv::Mat &leftT, cv::Mat &rightT, cv::Mat &top, cv::Mat &bottom);
std::vector<Mat> dx_, dy_;
int cost_type_;
float terminal_cost_;
float bad_region_penalty_;
};
} // namespace detail
} // namespace cv
#endif // __OPENCV_STITCHING_SEAM_FINDERS_HPP__
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