c++ opencv 基本操作

opencv4可以多通道计算，opencv3.4只能计算单通道图像。

  

   

    

     

    
    

     

      Mat image1, image3;
     
    
   

    

     

    
    

     

      	image1 = imread("D:\\zhengjian.jpg");
     
    
   

    

     

    
    

     
	if (!image1.data)
     
    
   

    

     

    
    

     

      	{
     
    
   

    

     

    
    

     
		return 0;
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     
	
     
    
   

    

     

    
    

     
	double minv = 0.0, maxv = 0.0;
     
    
   

    

     

    
    

     

      	minMaxIdx(image1, &minv, &maxv);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
	cout << "Mat minv = " << minv << endl;
     
    
   

    

     

    
    

     
	cout << "Mat maxv = " << maxv << endl;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 //归一化
     
    
   

    

     

    
    

     

      	image_new = (image_new - minVal) / (maxVal - minVal)*255;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 //转化类型
     
    
   

    

     

    
    

     

      	Mat dst = Mat::zeros(image_new.size(), CV_8U);
     
    
   

    

     

    
    

     

      	image_new.convertTo(dst, CV_8U);// , NULL, 0);
     
    
   

    

     

    
    

     
	//image_new.convertTo(image_new, CV_8U, 255.0 / (maxVal - minVal), 0);
     
    
  
 

//建立空的黑图

Mat atom_image = Mat::zeros(w, w, CV_8UC3);

乘法

  

   

    

     

    
    

     

      #include<opencv2/core/core.hpp>
     
    
   

    

     

    
    

     

      #include<opencv2/highgui/highgui.hpp>
     
    
   

    

     

    
    

     

      #include<opencv2/imgproc/imgproc.hpp>
     
    
   

    

     

    
    

     

      #include<vector>
     
    
   

    

     

    
    

     

      #include<iostream>
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      using namespace std;
     
    
   

    

     

    
    

     

      using namespace cv;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      int main()
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

      	Mat image1, image2, image3;
     
    
   

    

     

    
    

     

      	image1 = imread("C:\\Users\\Dell\\Desktop\\5.jpg");
     
    
   

    

     

    
    

     
	if (!image1.data)
     
    
   

    

     

    
    

     

      	{
     
    
   

    

     

    
    

     
		return 0;
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     

      	image2 = imread("C:\\Users\\Dell\\Desktop\\4.jpg");
     
    
   

    

     

    
    

     
	if (!image2.data)
     
    
   

    

     

    
    

     

      	{
     
    
   

    

     

    
    

     
		return 0;
     
    
   

    

     

    
    

     

      	}
     
    
   

    

     

    
    

     

      	resize(image2, image3, image1.size());
     
    
   

    

     

    
    

     

      	namedWindow("Image 1");
     
    
   

    

     

    
    

     

      	imshow("Image 1", image1);
     
    
   

    

     

    
    

     

      	namedWindow("Image 3");
     
    
   

    

     

    
    

     

      	imshow("Image 3", image3);
     
    
   

    

     

    
    

     

      	Mat result;
     
    
   

    

     

    
    

     

      	image3 = image3 * 0.3;
     
    
   

    

     

    
    

     

      	image1 = image1 * 0.9;
     
    
   

    

     

    
    

     

      	add(image1, image3, result);
     
    
   

    

     

    
    

     

      	namedWindow("result");
     
    
   

    

     

    
    

     

      	imshow("result", result);
     
    
   

    

     

    
    

     

      	waitKey(0);
     
    
   

    

     

    
    

     
	return 0;
     
    
   

    

     

    
    

     

      }
     
    
  
 

除法：

  

   

    

     

    
    

     

      Mat result1;
     
    
   

    

     

    
    

     

          imshow("result_o", image1);
     
    
   

    

     

    
    

     

          image1 = image1 / 2;
     
    
   

    

     

    
    

     

          imshow("result", image1);
     
    
  
 

文章来源: blog.csdn.net，作者：网奇，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/jacke121/article/details/110144885