code: def GaussianBlur(X, ksize_width, ksize_height, sigma_x, sigma_y):
      
      return image_transform(
          X,
          cv2.GaussianBlur,
          ksize=(ksize_width, ksize_height),
          sigmaX=sigma_x,
          sigmaY=sigma_y
      )
docs: Apply Gaussian blur to the given data.
  
      Args:
          X: data to blur
          kernel_size: Gaussian kernel size
          stddev: Gaussian kernel standard deviation (in both X and Y directions)