[1] A P Pentland. Fractal-based description of Nature Scenes[J].IEEE Transaction on Pattern Analysis Machine Intelligence, 1984,6(6):661-674.

[2] B B Mandelbrot. The Fractal-Geometry of Nature[M]. New York:W H Freeman,1983.

[3] MichaelC Stein. Fractal image models and Object Detection[J]. SPIE Visual Communications and Image Processing,1987,45(8):293-300.