My goal is to create yield maps using OpenCV. These yield maps need to be built with coloured rectangles to indicate yield. An example of a Mat built by rectangles here.
So is it possible to create a cv::Mat with coloured rectangles? The amount of rectangles isn't constant, thus changes with every use.
To make the question clear: if I have 4 boxes (2x2 grid) I want to automatically make a Mat which is as big as the 4 boxes. If I have 16 boxes (4x4 grid) I want to make a Mat which is as big as the 16 boxes.
I couldn't find a way to make it work, so I hope somebody here knows if it is possible.
If somebody can help me that would be great, if it is not possible alternatives are also welcome! Thanks
Some info:
OpenCV has cv::hconcat and cv::vconcat. Use them like numpy's hstack/vstack.
make sure your parts have the same type (and number of channels).
The documentation has a code example.
cv::Mat matArray[] = { cv::Mat(4, 1, CV_8UC1, cv::Scalar(1)),
cv::Mat(4, 1, CV_8UC1, cv::Scalar(2)),
cv::Mat(4, 1, CV_8UC1, cv::Scalar(3)),};
cv::Mat out;
cv::hconcat( matArray, 3, out );
//out:
//[1, 2, 3;
// 1, 2, 3;
// 1, 2, 3;
// 1, 2, 3]