opencv学习笔记1 加载图像 图像融合 分通道与合并

1.加载图像

#include<opencv.hpp>
using namespace cv;
int main()
{
    Mat a = imread("E:/test.jpg");
    imshow("picture", a);
    waitKey();
    return 0;
}

2.图像融合

#include<opencv2/opencv.hpp>
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>

using namespace cv;
using namespace std;

int main()
{
    Mat background = imread("E:/test.jpg"); 

    Mat logo = imread("E:/logo.jpg");

    Mat imageROI=background(Rect(100, 100, logo.cols, logo.rows));  //在background上定义感性区域

    addWeighted(imageROI, 0.5, logo, 0.3, 0., imageROI); //融合，将logo融合到ROI上，保存为ROI
    
    waitKey();
    return 0;
}

3.分通道

#include<iostream>
#include<vector>
#include<opencv2/opencv.hpp>
using namespace std;
using namespace cv;
int main3()
{
    Mat src = imread("E:/test.jpg");
    imshow("src", src);
    vector<Mat> channels;
    split(src, channels);
    
    Mat blue, green, red;
    blue = channels.at(0);
    green= channels.at(1);
    red= channels.at(2);
    imshow("blue", blue);
    imshow("green", green);
    imshow("red", red);

    waitKey();
    return 0;
}

合并

Mat dst;
    merge(channels, dst);
    imshow("dst", dst);