awe的程設筆記

#include<opencv2/opencv.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
#include<stdlib.h>

using namespace std;
using namespace cv;

Mat image ,image_gray;
int max_corners = 20;

void on_slider(int,void*)
{
    if(image_gray.empty()) return;
    
    max_corners = max(1, max_corners);
    setTrackbarPos("Max No. of corners","Corners",max_corners);
}    

int main()
{
    VideoCapture cap(0);
    
    if(!cap.isOpened())
    {
        cout<<"Can't get Video..."<<endl;
        exit(-1);
    }
    namedWindow("Corners");
    createTrackbar("Max No. of corners","Corners",&max_corners,250,on_slider);
    while((char)waitKey(1) != 'q' && cap.isOpened())
    {
        cap >> image;
        cvtColor(image,image_gray,CV_RGB2GRAY);
        float quality = 0.01;
        int min_distance = 10;

        vector<Point2d> corners;
        goodFeaturesToTrack(image_gray , corners,max_corners,quality,min_distance);
    
        Mat image_corners = image.clone();
    
        for(int i = 0 ; i < corners.size() ; i++)
        {
            circle(image_corners,corners[i],3,CV_RGB(255,0,0),-1);
        }
    
        imshow("Corners",image_corners);
    }
    return 0;
}

測試偵測和式門結果