在C++中使用openCV在图像上书写

在本文中，我们将讨论如何使用OpenCV C++覆盖图像。从OpenCV的C++库函数putText()将被用来写文本的图像上。

程序1：

下面的程序显示了如何在空白背景图像上写文本：

C++

// C++ program to demonstrate the
// above approach
#include 
#include 
  
// Library to include for
// drawing shapes
#include 
#include 
using namespace cv;
using namespace std;
  
// Driver Code
int main(int argc, char** argv)
{
    // Create a blank image of size
    // (500 x 500) with white background
    // (B, G, R) : (255, 255, 255)
    Mat image(500, 500, CV_8UC3,
              Scalar(255, 255, 255));
  
    // Check if the image is created
    // successfully.
    if (!image.data) {
        cout << "Could not open or"
             << " find the image"
             << endl;
        return 0;
    }
  
    // Writing over the Image
    Point org(30, 100);
    putText(image, "Text On Image", org,
            FONT_HERSHEY_SCRIPT_COMPLEX, 2.1,
            Scalar(0, 0, 255), 2, LINE_AA);
  
    // Show our image inside a window.
    imshow("Output", image);
    waitKey(0);
  
    return 0;
}

输出：

程式2：

下面的程序显示了如何在加载的图像上写入文本：

C++

// C++ program to demonstrate the
// above approach
#include 
#include 
  
// Library to include for
// drawing shapes
#include 
#include 
using namespace cv;
using namespace std;
  
// Driver Code
int main(int argc, char** argv)
{
    // Create a blank image of size
    // (500 x 500) with white background
    // (B, G, R) : (255, 255, 255)
    Mat image = imread("C:/Users/harsh/Downloads/geeks.png",
                       IMREAD_COLOR);
  
    // Check if the image is
    // created successfully.
    if (!image.data) {
        cout << "Could not open or"
             << " find the image" << std::endl;
        return 0;
    }
  
    // Writing over the Image
    Point org(1, 30);
    putText(image, "Geeks For Geeks", org,
            FONT_HERSHEY_SCRIPT_COMPLEX, 1.0,
            Scalar(0, 255, 0), 2, LINE_AA);
  
    // Show our image inside a window.
    imshow("Output", image);
    waitKey(0);
  
    return 0;
}

输出：

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