c++ - KalmanFilter Tracking in openCV - Program received signal SIGSEGV -

c++ - KalmanFilter Tracking in openCV - Program received signal SIGSEGV -

i wanted test kalmanfilter tracking purposes , found several tutorials pretty similar overall (as initializing opencvs kalmanfilter , setting parameters).

i went after implementation: https://github.com/screename/kalman-filter-tracker/blob/master/kalmanfiltertracker.ccp

i'm having problem testing though because whenever start programme crashes. there's no build-errors when start debugging shows short message of "program received signal sigsegv - segmentation fault.

the phone call stack shows there's problems mat.hpp in line 574:

int = i0/cols, j = i0 - i*cols;

and @ line 1043:

template<typename _tp> inline _tp& mat_<_tp>::operator ()(int i0) { homecoming this->at<_tp>(i0); }

within kalmanfilter class these lines seem troubling:

measurement(0) = x; measurement(1) = y;

with

mat_<float> measurement;

and initializing with

measurement(2, 1); measurement.setto(scalar(0));

any thought on might causing problems here and/or how prepare it? tried few things before haven't found cause far. appreciate help.

i bet wanted:

mat_<float> measurement(2, 1); // alloc 2 rows, 1 col measurement.setto(scalar(0));

not:

mat_<float> measurement; // *empty* mat. measurement(2, 1); // invalid access on *empty* mat (would out of bounds, too)

c++ opencv segmentation-fault sigsegv