1. An adaptable shape image encoding apparatus comprising: means for slicing an image so that it is adaptable to the shape of an input image and dividing the sliced images into blocks having a size according to at least one of the image density and the image resolution of the input image; and means for defining the movement of a object in the image using parameters including data for specifying the sliced images and the amounts of shift of the sliced images from a reference position and for encoding the respective divided blocks using the movement of the object.