|| José Franco on 2013-11-12 22:59
|| Priority: Normal
|| Affected: None
|| Category: core
|| Tracker: Feature
|| Difficulty: Easy
|| PR: 
|| Platform: None / None

Hello,

Despite cv::Vec<_Tp, int> being equivalent to cv::Matx<_Tp, int, 1>, it is currently not possible to initialize them with the Matx<_Tp, int, int> initializers cv::Matx<_Tp, int, int>::zeros(), ones(), etc. It is also not clear how to assign a cv::Matx<_Tp, int, 1> to a cv::Vec<_Tp, int>. These initializers would be very helpful.

Thanks

Hi José, 
thanks for feature request.
Yes, actually these initializers would be helpful. Unfortunately, now we have limited human resources. So if you could implement this functionality and send a pull request on GitHub (http://www.code.opencv.org/projects/opencv/wiki/How_to_contribute), it would be much appreciated!

-   Status changed from New to Open

Hi Ivan,

I'm a student and just getting started with contributing to openCV (though have a lot of experience in using openCV).
I've already forked, cloned, built and played a bit with the source code.
I want to work on this task, and think it'd be better to run my ideas through you before starting to code.

If I understand the question correctly, we essentially want the ::zeros() kind-of initializers for the Vec.
In my understanding, Vec is implemented using Mat in modules/core/include/opencv2/core/matx.hpp (line 869).
So essentially, I need to add another function there for initialization.

Please let me know if I'm on the right track or not. 
I'm really a noob in working on open source, so please forgive me for mistakes.

Thanks a lot!

PR for ::zeros() initializer (https://github.com/Itseez/opencv/pull/2307)