docs: public static void imageToTensor(Planar<GrayF32> input , Tensor_F32 output , int miniBatch) {
  		if( input.isSubimage())
  			throw new RuntimeException("Subimages not accepted");
  		if( output.getDimension() != 4 )
  			throw new IllegalArgumentException("Output should be 4-DOF.  batch + spatial (channel,height,width)");
  		if( output.length(1) != input.getNumBands() )
  			throw new IllegalArgumentException("Number of bands don't match");
  		if( output.length(2) != input.getHeight() )
  			throw new IllegalArgumentException("Spatial height doesn't match");
  		if( output.length(3) != input.getWidth() )
  			throw new IllegalArgumentException("Spatial width doesn't match");
  
  		for (int i = 0; i < input.getNumBands(); i++) {
  			GrayF32 band = input.getBand(i);
  			int indexOut = output.idx(miniBatch,i,0,0);
  
  			int length = input.width*input.height;
  			System.arraycopy(band.data, 0,output.d,indexOut,length);
  		}
  	}