Not getting the result properly

[jcthink]

Results are getting black color. Is it need to uncomment the line before saving to get proper result

imgtest = imgtest * 255.0

imgtest.astype(np.uint8)

        save_images(imgtest, [8,8] ,newPoke_path + '/epoch' + str(i) + '.jpg')

[t2ac32]

I uncommented but after 750 epoch images are still black.