docs: public static <I extends ImageGray<I>, O extends ImageGray<O>>
  	void filter(ImagePyramid<I> input, FilterImageInterface<I, O> filter, O[] output )
  	{
  		for( int i = 0; i < input.getNumLayers(); i++ ) {
  			I imageIn = input.getLayer(i);
  			filter.process(imageIn,output[i]);
  		}
  	}