Remains same.
Augmented image is a new PIL Image object.
def _new(self, im):
    new = Image()
    new.im = im
    new.mode = im.mode
    new.size = im.size
    if self.palette:
        new.palette = self.palette.copy()
    if im.mode == "P" and not new.palette:
        from PIL import ImagePalette
        new.palette = ImagePalette.ImagePalette()
    new.info = self.info.copy()
    return new