How to save images in inverse gray-scale?

Question

Can anyone tell how to save images in inverse gray-scale using scipy.misc.imsave.Using below code I'm able to save images in gray-scale mode only but I need inverse gray-scale images for my classification task

            data = next(generator_queues[j])

            assert data.shape == target_shape, "Shape mismatch {} vs {}".format(data.shape, args.shape)

            file_name = os.path.join(args.target, language, "{}.png".format(i))

            scipy.misc.imsave(file_name, np.squeeze(data))

Answer 1

Try: np.squeeze(255 - data)

    data = next(generator_queues[j])

    assert data.shape == target_shape, "Shape mismatch {} vs {}".format(data.shape, args.shape)

    file_name = os.path.join(args.target, language, "{}.png".format(i))

    scipy.misc.imsave(file_name, np.squeeze(255 - data)) # if not normalised else 1 - data