text: """
  * Python script to load a color image as grayscale.
  *
  * usage: python LoadGray.py <filename>
  """
  import sys
  import skimage.io
  import skimage.color
  
  # read input image, based on filename parameter
  image = skimage.io.imread(fname=sys.argv[1], as_gray=True)
  
  # display grayscale image
  skimage.io.imshow(image)
  