docs: public static void realToComplex(GrayF32 real , InterleavedF32 complex ) {
  		checkImageArguments(real,complex);
  		for( int y = 0; y < complex.height; y++ ) {
  
  			int indexReal = real.startIndex + y*real.stride;
  			int indexComplex = complex.startIndex + y*complex.stride;
  
  			for( int x = 0; x < real.width; x++, indexReal++ , indexComplex += 2 ) {
  				complex.data[indexComplex] = real.data[indexReal];
  				complex.data[indexComplex+1] = 0;
  			}
  		}
  	}