code: public static <T extends ImageGray<T>, D extends ImageGray<D>>
  	GeneralFeatureDetector<T, D> createHarris( @Nullable ConfigGeneralDetector configDetector,
  											   @Nullable ConfigHarrisCorner configCorner, Class<D> derivType) {
  		if( configDetector == null)
  			configDetector = new ConfigGeneralDetector();
  		if( configCorner == null) {
  			configCorner = new ConfigHarrisCorner();
  			configCorner.radius = configDetector.radius;
  		}
  
  		GradientCornerIntensity<D> cornerIntensity =
  				FactoryIntensityPointAlg.harris(
  						configCorner.radius,(float)configCorner.kappa,configCorner.weighted, derivType);
  		return createGeneral(cornerIntensity, configDetector);
  	}
docs: Detects Harris corners.
  
  @param configDetector Configuration for feature detector.
  @param configCorner   Configuration for corner intensity computation. If null radius will match detector radius
  @param derivType       Type of derivative image.
  @see boofcv.alg.feature.detect.intensity.HarrisCornerIntensity