docs: protected static void computeAlphas( InterleavedF64 yf , InterleavedF64 kf , double lambda ,
  										 InterleavedF64 alphaf ) {
  
  		for( int y = 0; y < kf.height; y++ ) {
  
  			int index = yf.startIndex + y*yf.stride;
  
  			for( int x = 0; x < kf.width; x++, index += 2 ) {
  				double a = yf.data[index];
  				double b = yf.data[index+1];
  
  				double c = kf.data[index] + lambda;
  				double d = kf.data[index+1];
  
  				double bottom = c*c + d*d;
  
  				alphaf.data[index] = (a*c + b*d)/bottom;
  				alphaf.data[index+1] = (b*c - a*d)/bottom;
  			}
  		}
  	}