ORB.empty constructor
ORB.empty()
returns a new ORB algorithm
For further details, please see: https://docs.opencv.org/master/d3/d61/classcv_1_1KAZE.html
Implementation
factory ORB.empty() {
final p = calloc<cvg.ORB>();
cvRun(() => cffi.ORB_Create(p));
return ORB._(p);
}