4 cover = im.open("lena512.bmp")
5 cover.save("lena512.png")
7 d7= im.open("diff7.pgm")
9 d7= im.open("diff7.png")
11 l6 = im.open("lena6.pgm")
14 l7 = im.open("lena7.pgm")
18 e6 = im.open("edge6.pgm")
21 e7 = im.open("edge7.pgm")
25 d6= im.open("diff6.pgm")
27 d6= im.open("diff6.png")