CODEWITHSUNDEEP
opencv
valentin
valentin

Reputation: 1123

How should a typical .yml or .xml matrix look for OpenCV use

I need to specify a matrix inside a file and then load it onto OpenCV as a Mat for further processing. How can the cols and lines be specified and where do elements go within the .xml or .yml file?, (for example element A(i,j) for i from 1 to m lines and for j from 1 to n cols. In Matlab for example, this is done by loading a .dat file with just the numbers. What is confusing with OpenCV is that the .yml or .xml have some other scripts to them.

Upvotes: 0

Views: 1580

Answers (1)

Saikat
Saikat

Reputation: 1219

Read/Write any OpenCV data structure to or from .xml / .yaml file is very simple.

Before you write any content to such file you need to open it and at the end to close it. The XML/YAML data structure in OpenCV is FileStorage.

string filename = "I.xml";
FileStorage fs(filename, FileStorage::WRITE);

Mat R = Mat_<uchar >::eye (3, 3),

fs << "R" << R; // Write entire cv::Mat
fs["R"] >> R;   // Read entire cv::Mat

Check out this link File Input and Output using XML and YAML files

Upvotes: 7

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