CODEWITHSUNDEEP
c++opencvmatrixmultidimensional-array
ofndsonfdosnf
ofndsonfdosnf

Reputation: 41

Is it possible to make OpenCV matricies with manual input?

I am trying to store the location of four specific points and then putting it into the cv::fillPoly function. Currently my locations are stored in a multidimensional array is there a way to convert this or make it straight into a format it accepts?

int PointLocationArray[4][2] = {{point1_x, point1_y}, {point2_x, point2_y}, {point3_x, point3_y}, {point4_x, point4_y}};

and I'm trying to get it into:

cv::fillPoly(newRegion, PointLocationArray, 255);

Upvotes: 1

Views: 177

Answers (1)

ypnos
ypnos

Reputation: 52417

A very simple way is to start with a flat array and then reshape the matrix:

static const std::vector<double> data = { 1.0, 2.0, 1.0, 2.0 }; // two points
Mat ret = Mat(data).reshape(2, 2);

Note: This way, ret is a wrapper around data. If you would like to copy the data instead, use Mat(data, true).

Another way is to use a combination of << operator and , operator for initialization, again, providing the values in a flat manner:

Mat ret = (Mat_<double>(2, 2) << 1.0, 2.0, 1.0, 2.0);

Upvotes: 1

Related Questions