code: protected static boolean checkMax(ImageBorder_F32 inten, float bestScore, int c_x, int c_y) {
  		for( int y = c_y -1; y <= c_y+1; y++ ) {
  			for( int x = c_x-1; x <= c_x+1; x++ ) {
  				if( inten.get(x,y) >= bestScore ) {
  					return false;
  				}
  			}
  		}
  		return true;
  	}
docs: Sees if the best score in the current layer is greater than all the scores in a 3x3 neighborhood
  in another layer.