Has anyone used the KalmanFilter Opencv libraries inside ROS?

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Hi, I was wondering if someone has used the Kalman filter of Opencv inside ROS. The "normal" Opencv program works perfectly, but when i use it inside ros (The same code), it throws me the following error:

‘KF’ does not name a type
 KF.transitionMatrix = *(Mat_<float>(4, 4) << 1,0,1,0,   0,1,0,1,  0,0,1,0,  0,0,0,1);

The relevant include is:

#include <opencv2/video/tracking.hpp>
#include <opencv2/video/video.hpp>

That is the same that I use in the normal Opencv code, but in ROS it doesnt work.

Thanks