code: public static <I extends ImageGray<I>, D extends ImageGray<D>>
  	PointTracker<I> klt(int scaling[], ConfigGeneralDetector configExtract, int featureRadius,
  							 Class<I> imageType, Class<D> derivType) {
  		PkltConfig config = new PkltConfig();
  		config.pyramidScaling = scaling;
  		config.templateRadius = featureRadius;
  
  		return klt(config, configExtract, imageType, derivType );
  	}
docs: Pyramid KLT feature tracker.
  
  @see boofcv.alg.tracker.klt.PyramidKltTracker
  
  @param scaling       Scales in the image pyramid. Recommend [1,2,4] or [2,4]
  @param configExtract Configuration for extracting features
  @param featureRadius Size of the tracked feature.  Try 3 or 5
  @param imageType     Input image type.
  @param derivType     Image derivative  type.
  @return KLT based tracker.