'Test using a min/max linear stretch determined from one image'

def test_linear_min_max(self):

    map = lupton_rgb.LinearMapping(image=self.image_b)
    rgbImage = map.make_rgb_image(self.image_r, self.image_g, self.image_b)
    if display:
        display_rgb(rgbImage, title=sys._getframe().f_code.co_name)
