Hi a Nx2 mat variable temp that has form
[a,b;
c,d;
e,f;
...,...]
in cout<<temp
when i type temp.rows it gives me N, when i type temp.cols it gives me 1!!!!!!
hence when I used temp.t() the cout output is a 1x2N row vector.
What happened ? Thx
to understand your question i tried the code below and output is normal. if you show your code we can test it and try to explain why your transposed mat has 1x2N rows.
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <iostream>
using namespace cv;
using namespace std;
int main( int, char** argv )
{
vector<Point> points;
points.push_back(Point(0,1));
points.push_back(Point(2,3));
points.push_back(Point(4,5));
points.push_back(Point(6,7));
points.push_back(Point(8,9));
Mat m = Mat(points);
cout << "rows : " << m.rows << endl;
cout << "cols : " << m.cols << endl;
cout << m << endl;
Mat transposed = m.t();
cout << "transposed rows : " << transposed.rows << endl;
cout << "transposed cols : " << transposed.cols << endl;
cout << transposed << endl;
}
output:
rows : 5
cols : 1
[0, 1;
2, 3;
4, 5;
6, 7;
8, 9]
transposed rows : 1
transposed cols : 5
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Asked: 2016-05-20 01:07:25 -0600
Seen: 11,522 times
Last updated: May 20 '16
How many channels does your Mat have? are you sure it is an Nx2 Mat and not a n Nx1 mat with two channels?
Both should print as N rows of 2 using cout. but when you transpose, the first will print as two rows of N and the second will probably print as a row of 2N. guy