Canny算子

最新推荐文章于 2021-12-04 20:07:14 发布

neverfadingMay

最新推荐文章于 2021-12-04 20:07:14 发布

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分类专栏： OpenCV

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Canny(gray-level image, output contours, low threshold, high threshold);


#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

#include <iostream>
using namespace std;
using namespace cv;

int main()
{
    Mat image= imread("image.jpg");
    Mat image_gray;
    cvtColor(image,image_gray,CV_RGB2GRAY);
    namedWindow("original image",WINDOW_NORMAL);
    imshow("original image",image_gray);

    Mat contours;
    Canny(image, contours, 70, 350);
    namedWindow("Canny",WINDOW_NORMAL);
    imshow("Canny",contours);
    waitKey(0);
}

这里写图片描述

来加一个threshold


#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

#include <iostream>
using namespace std;
using namespace cv;

int main()
{
    Mat image= imread("image.jpg");
    Mat image_gray;
    cvtColor(image,image_gray,CV_RGB2GRAY);
    namedWindow("original image",WINDOW_NORMAL);
    imshow("original image",image_gray);

    Mat contours;
    Canny(image, contours, 70, 350);

    Mat contoursInv;
    threshold(contours, contoursInv, 128, 255, THRESH_BINARY_INV);
    namedWindow("Canny",WINDOW_NORMAL);
    imshow("Canny",contoursInv);
    waitKey(0);
}

这里写图片描述