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遥感学报  1998 

A New Method for Generation of Fractal Images
分形图形生成的一种新方法

Keywords: Fractal Image,Fractional Brownian motion,Power spectrum,Shaping filter,frequency-response,Digital filter design
分形图形,分数维布朗运动,功率谱,成形滤波器,频率响应,数字滤波器设计

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Abstract:

A new method for generation of fractal Images is presented in this paper. To synthesize fractal Images, fractional Brownian motions are used which are obtained by a new means-recursive space filtering. The power spectrum of fractional Brownian motion can be used to determine the frequency-response of the two-dimensional shaping filter of fractional Brownian motion, then the shaping filter whose frequency response is circularly symmetric and exponentially decaying can be designed using a method based on one-dimensional prototype filter and rotation transforms. The fractional Brownian motion based fractal Image with desired fractional dimension can be generated by applying its shaping filter to a Gaussian distributed white process.

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