I was reading a code which was like this :
CvMat * MyMat[10];
for(int i = 0; i<10; i++)
{
MyMat[i] = 0;
}
what does this do ?
Does it initialize the MyMat to 0.
And if I want to do the same in cv::Mat ,
can I do
cv::Mat MyMat[10];
for(int i = 0; i<10; i++)
{
MyMat[i].setTo(Scalar::all(0));
}
first, please do not use CvMat, IplImage or anything from the deprecated opencv1.0 c-api. please stick with cv::Mat and c++.
then, neither example probably does , what you want. before you can set values of a Mat, you have to allocate memory, like:
Mat m(3,3,CV_8U);
m.setTo(Scalar::all(17));
or, all in one go:
Mat m(3,3,CV_8U,Scalar::all(17));
(and again, you should ignore the 1st example entirely, it is no more valid today)
please also have a look at the tutorials
I wasn't using CvMat, but I was trying to understand a code snippet which used CvMat and convert it to cv::Mat. If MyMat[i] = 0; does not set matrix to zero then what does it do ?
Asked: 2016-08-05 01:46:15 -0600
Seen: 1,167 times
Last updated: Aug 05 '16
