def METHOD_NAME(image_array, im_num):
    """ Process/display an image
        image is not modified in this simplistic example - but might have been
    """
    if not show_plot:
        return image_array
    # display the current estimate of the image at z = 20
    pylab.figure(im_num)
    pylab.title('image estimate %d' % im_num)
    pylab.imshow(image_array[20,:,:])
    print('You may need to close Figure %d window to continue' % im_num)
    return image_array