Multiscale and multidirection are natural attributes of image, which can help to describe the image more objectively, hence more essences of image can be revealed.

• 多尺度特性与方向性是图像的自然属性,在图像处理时抓住图像的自然属性将有助于更加客观地描述图像,从而可以揭示更多的图像本质特性。