Save Xml file directory problem. Openframeworks and fileStorage [closed]

asked 2018-07-18 05:25:44 -0500

nouIgnasi gravatar image

updated 2018-07-18 05:41:32 -0500

Hello,

I'm working on an OpenFrameworks app, where I am using the OpenCV addon (ofxOpenCV). The problem occurs when I try to save the ANN parameters on a xml file. The xml does not appear on the entire system. I try another version with a simple matrix and the result is the same.

I am using Xcode (C++). OpenCV version : 3.4.1.

I try the following code and return the weights (one of the ANN parameters) so, maybe somewhere there is the xml file...

    FileStorage fs;
    fs.open("mlp.xml", FileStorage::WRITE);
    ann[0]->write(fs);
    fs.release();

    FileStorage opencv_file("mlp.xml", FileStorage::READ);
    Ptr<ANN_MLP> nn = ANN_MLP::create();

    nn->read(opencv_file.root());
    cout << nn->getWeights(0) <<endl; //RETURN THE WEIGHTS
    opencv_file.release();

I also try to read by fileNode and the output matrix is empty.

The idea is to load/save (write/read) different xml files (or other types of files) to set different ANN parameters.

Any idea?

Thank you! Ignasi.

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Closed for the following reason the question is answered, right answer was accepted by nouIgnasi
close date 2018-07-18 06:05:36.811446

Comments

OpenCV version : 2.4.9. -- ouch.

please check again. above code would require opencv 3.x

maybe you also should check fs.isOpened()

trying with an absolute path would be another idea.

berak gravatar imageberak ( 2018-07-18 05:26:37 -0500 )edit
1

Sorry, version edited (3.4.1). I also check if it is opened and it is ok.

     FileStorage fs;
    fs.open("mlp.xml", FileStorage::WRITE);
    if (!fs.isOpened())
    {
        cout << "Not opened" << endl;
    }else{
        cout << "fs is opended" <<endl;
    ann[0]->write(fs);
    fs.release();
    }
    FileStorage opencv_file("mlp.xml", FileStorage::READ);


    if (!opencv_file.isOpened())
    {
        cout << "Not oppened" << endl;
    }else{
        cout << "opencvfile is opended" <<endl;

    Ptr<ANN_MLP> nn = ANN_MLP::create();

    nn->read(opencv_file.root());
    cout << nn->getWeights(0) <<endl; //RETURN THE WEIGHTS
    opencv_file.release();
    }
nouIgnasi gravatar imagenouIgnasi ( 2018-07-18 05:44:07 -0500 )edit

Absolute path (but inside the project folder). Thank you! Thank you! Thank you! and Thank you!

nouIgnasi gravatar imagenouIgnasi ( 2018-07-18 06:03:28 -0500 )edit