CODEWITHSUNDEEP
opencvmatrix
justHelloWorld
justHelloWorld

Reputation: 6828

Set cv::Mat type without matrix size

I want to set the type of a cv::Mat object to CV_32F, but I don't care (at declaration time) of the matrix size.

There is any other way to do this:

cv::Mat m (0,0,CV_32F);

Something like:

cv::Mat m;
m.setType(CV_32F);

Upvotes: 1

Views: 839

Answers (1)

Adi Shavit
Adi Shavit

Reputation: 17265

The simple answer is use cv::Mat1f or e.g. cv::Mat3f (as @Miki suggested).

However, the place where it actually matters is at allocation time, so there's no problem just leaving m as is, and when you actually come to allocate it to the desired size, set it there (e.g. with cv::Mat::create().

If m is just passed it auto allocating functions, then you don't actually need to set it at all.

Upvotes: 1

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