docs: protected void computeGaussianWeights( int width ) {
  		// desired output (gaussian shaped), bandwidth proportional to target size
  		double output_sigma = Math.sqrt(width*width) * output_sigma_factor;
  
  		double left = -0.5/(output_sigma*output_sigma);
  
  		int radius = width/2;
  
  		for( int y = 0; y < gaussianWeight.height; y++ ) {
  			int index = gaussianWeight.startIndex + y*gaussianWeight.stride;
  
  			double ry = y-radius;
  
  			for( int x = 0; x < width; x++ ) {
  				double rx = x-radius;
  
  				gaussianWeight.data[index++] = Math.exp(left * (ry * ry + rx * rx));
  			}
  		}
  
  		fft.forward(gaussianWeight,gaussianWeightDFT);
  	}