[2] Mandelbrot B B.Self-affine Fractal Sets[A]. Fractals in Physics[C]. Amsterdam:North-Holland, 1986.
[3] Mandelbrot B B.The Fractal Geometry of Nature[M].San Francisco. CA:Freeman, 1982.
[5] Stein M C. Fractal image models and object detection[A].SPIE Visual Communication and Image Processing Ⅱ[C].1987, 845.293-300.