BackgroundSubtractorKNN.create constructor
      
      BackgroundSubtractorKNN.create({})
     
    
    
Implementation
factory BackgroundSubtractorKNN.create({
  int history = 500,
  double varThreshold = 16,
  bool detectShadows = true,
}) {
  final p = calloc<cvg.BackgroundSubtractorKNN>();
  cvRun(() => cvideo.cv_BackgroundSubtractorKNN_create_1(history, varThreshold, detectShadows, p));
  return BackgroundSubtractorKNN(p);
}