从分数的分子和分母中去掉相同的因数，我们称为约分。
We call it reduction to remove the same factors from the terms of a fraction.
从分数阶微分对图像细微细节的增强能力出发，对分数阶微分的机理进行分析。
Starting from the enhanced ability of fractional differential to image details, the authors analyzed the mechanism of fractional differential.
本文从分数布朗随机场模型的描述出发，提出并构造了一种广义多尺度分形参数，用于描述图像的纹理信息。
In this paper, a kind of generalized multiscale fractal parameter is proposed and constructed for the description of image textures, which is based on fractional Brownian random field model.
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