n CHW layout (or HW in the case of grayscale images)
    and saves it in a PNG file.

    Args:
        input (Tensor[channels, image_height, image_width]): int8 image tensor of
            ``c`` channels, where ``c`` must be 1 or 3.
        filename (str): Path to save the image.
        compression_level (int): Compression factor for the resulting file, it must be a number
            between 0 and 9. Default: 6
    N)r