code: def convert_image_to_rgb_mode(image, fill_color=(255, 255, 255)):
      
      if image.mode not in ('RGBA', 'LA'):
          return image
  
      # In most cases simply discarding the alpha channel will give
      # undesirable result, because transparent pixels also have some
      # unpredictable colors. It is much better to fill transparent pixels
      # with a specified color.
      background_image = Image.new(image.mode[:-1], image.size, fill_color)
      background_image.paste(image, image.split()[-1])
      return background_image
docs: Convert the specified image instance to RGB mode.
  
  
      @param image: a Python Library Image (PIL) instance to convert its
          pixel format to RGB, discarding the alpha channel.
  
      @param fill_color: color to be used to fill transparent pixels when
          discaring the alpha channel.  By default, the white color.
  
  
      @return: a Python Library Image instance with pixel format of RGB.