【OpenCV_05】把图像&视频写入文件Write Image & Video to File

最新推荐文章于 2024-04-30 19:59:27 发布

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最新推荐文章于 2024-04-30 19:59:27 发布 · 5.2k 阅读

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今天，聊聊怎么吧图像以及视频写入到文件里。

Write Image to File 把图片写入到文件

下面的例子是创建一个黄色的图像并且写到文件里，下面就是采用OpenCV来实现.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Write Image & Video to File

#include "opencv2/highgui/highgui.hpp"
#include <iostream>

using namespace cv;
using namespace std;

int main( int argc, const char** argv )
{
  Mat img(650, 600, CV_16UC3, Scalar(0,50000, 50000)); //create an image ( 3 channels, 16 bit image depth, 650 high, 600 wide, (0, 50000, 50000) assigned for Blue, Green and Red plane respectively. )

if (img.empty()) //check whether the image is loaded or not
{
cout << "ERROR : Image cannot be loaded..!!" << endl;
          //system("pause"); //wait for a key press
return -1;
}

     vector<int> compression_params; //vector that stores the compression parameters of the image

     compression_params.push_back(CV_IMWRITE_JPEG_QUALITY); //specify the compression technique

     compression_params.push_back(98); //specify the compression quality



     bool bSuccess = imwrite("D:/TestImage.jpg", img, compression_params); //write the image to file



     if ( !bSuccess )

    {

cout << "ERROR : Failed to save the image" << endl;

         //system("pause"); //wait for a key press

    }

namedWindow("MyWindow", CV_WINDOW_AUTOSIZE); //create a window with the name "MyWindow"
imshow("MyWindow", img); //display the image which is stored in the 'img' in the "MyWindow" window

waitKey(0);  //wait for a keypress

     destroyWindow("MyWindow"); //destroy the window with the name, "MyWindow"

return 0;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////