I am trying to create a Histogram using the CreateHistogram funktion, so far so good.
When i checked into the memory there lies a flat CvMatND which in turn has a size and a step for each dimension.
As an example a 3D Mat with sizes of 5 results in (5,100,5,20,5,4).
Checking in the code the funktion goes like: (Cut out unimportant parts)
int64 step = CV_ELEM_SIZE(type); //step = get element size
for( int i = dims - 1; i >= 0; i-- ) // running through all dims from the back
mat->dim[i].step = (int)step; // puts step into the Mat
step *= sizes[i]; //multiplies with size now
this is strange for 2 reasons.
- the last step is always the size of one element, this should imho definetly not be like that.
- the step grow, this CAN be correct if you define it so that the dimensions encompass all lower dimensions.
Is this a bug or does it have a deeper meanig i dont understand?