We can use XML to store the OpenCV matrix and read it to recover the whole image.
A simple example is in the following code snippet.
We write an original image data to Untitled1.xml, then read it to generate another Mat object and show it.

#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <opencv2/core.hpp>
#include <string>

using namespace cv;

int main(int argc, char** argv )
{
    Mat image;
    std::string fileName = "/Users/weiyang/Desktop/Untitled1.png";
    std::string outName = "/Users/weiyang/Desktop/Untitled1.xml";
    image = imread( fileName, IMREAD_COLOR );

    if ( !image.data )
    {
        printf("No image data \n");
        return -1;
    }

    // =============== write ================
    FileStorage fs1( outName, FileStorage::WRITE );
    fs1 << "image" << image;
    fs1.release();

    // =============== read ================
    FileStorage fs2;
    fs2.open( outName, FileStorage::READ );
    Mat readMat;
    fs2["image"] >> readMat;
    std::cout << "readMat = " << readMat << std::endl;

    namedWindow("Display Image", WINDOW_AUTOSIZE );
    imshow("Display Image", readMat);
    waitKey(0);

    return 0;
}


More using details about XML and YAML can be found in File Input and Output using XML and YAML files

Categories: OpenCV

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