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#ifndef UTILS_H
#define UTILS_H
#include <opencv2/core.hpp>
#include <vector>
#include "stats.h"
using namespace std;
using namespace cv;
void drawBoundingBox(Mat image, vector<Point2f> bb);
void drawStatistics(Mat image, const Stats& stats);
void printStatistics(string name, Stats stats);
vector<Point2f> Points(vector<KeyPoint> keypoints);
Rect2d selectROI(const String &video_name, const Mat &frame);
void drawBoundingBox(Mat image, vector<Point2f> bb)
{
for(unsigned i = 0; i < bb.size() - 1; i++) {
line(image, bb[i], bb[i + 1], Scalar(0, 0, 255), 2);
}
line(image, bb[bb.size() - 1], bb[0], Scalar(0, 0, 255), 2);
}
void drawStatistics(Mat image, const Stats& stats)
{
static const int font = FONT_HERSHEY_PLAIN;
stringstream str1, str2, str3;
str1 << "Matches: " << stats.matches;
str2 << "Inliers: " << stats.inliers;
str3 << "Inlier ratio: " << setprecision(2) << stats.ratio;
putText(image, str1.str(), Point(0, image.rows - 90), font, 2, Scalar::all(255), 3);
putText(image, str2.str(), Point(0, image.rows - 60), font, 2, Scalar::all(255), 3);
putText(image, str3.str(), Point(0, image.rows - 30), font, 2, Scalar::all(255), 3);
}
void printStatistics(string name, Stats stats)
{
cout << name << endl;
cout << "----------" << endl;
cout << "Matches " << stats.matches << endl;
cout << "Inliers " << stats.inliers << endl;
cout << "Inlier ratio " << setprecision(2) << stats.ratio << endl;
cout << "Keypoints " << stats.keypoints << endl;
cout << endl;
}
vector<Point2f> Points(vector<KeyPoint> keypoints)
{
vector<Point2f> res;
for(unsigned i = 0; i < keypoints.size(); i++) {
res.push_back(keypoints[i].pt);
}
return res;
}
Rect2d selectROI(const String &video_name, const Mat &frame)
{
struct Data
{
Point center;
Rect2d box;
static void mouseHandler(int event, int x, int y, int flags, void *param)
{
Data *data = (Data*)param;
switch( event )
{
// start to select the bounding box
case EVENT_LBUTTONDOWN:
data->box = cvRect( x, y, 0, 0 );
data->center = Point2f((float)x,(float)y);
break;
// update the selected bounding box
case EVENT_MOUSEMOVE:
if(flags == 1)
{
data->box.width = 2 * (x - data->center.x);
data->box.height = 2 * (y - data->center.y);
data->box.x = data->center.x - data->box.width / 2.0;
data->box.y = data->center.y - data->box.height / 2.0;
}
break;
// cleaning up the selected bounding box
case EVENT_LBUTTONUP:
if( data->box.width < 0 )
{
data->box.x += data->box.width;
data->box.width *= -1;
}
if( data->box.height < 0 )
{
data->box.y += data->box.height;
data->box.height *= -1;
}
break;
}
}
} data;
setMouseCallback(video_name, Data::mouseHandler, &data);
while(waitKey(1) < 0)
{
Mat draw = frame.clone();
rectangle(draw, data.box, Scalar(255,0,0), 2, 1);
imshow(video_name, draw);
}
return data.box;
}
#endif // UTILS_H
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