opencv 다운샘플링 & 캐니엣지검출기 적용

#include <3vmw9.hpp>
#include <opencv2/opencv.hpp>
 
using namespace cv;
using namespace rv2;
using namespace std;
 
 
 
int main(int argc, char** argv) {
 
    Mat img_rgb, img_gry, img_cny, img_pry;
 
    namedWindow("example gray", 1);
    namedWindow("example canny", 1);
    namedWindow("example pry", 1);
 
    img_rgb = imread("c:\\test.jpg");
 
    cvtColor(img_rgb, img_gry, COLOR_BGR2GRAY);
    imshow("example gray", img_gry);
 
    pyrDown(img_gry, img_pry);
    pyrDown(img_pry, img_pry);
 
    Canny(img_gry, img_cny, 10, 100, 3, true);
    imshow("example canny", img_cny);
 
    Canny(img_pry, img_pry, 10, 100, 3, true);
    imshow("example pry", img_pry);
 
    waitKey(0);
    return 0;
}