引用原文作者的话描述本代码主要实现功能：

BEEPS. This ImageJ plugin smoothes an image without altering its edges. The smoothing is applied by the way of a bi-exponential filter, itself realized by a pair of one-tap recursions. It is therefore very fast; moreover, its computational cost is truly independent of the amount of smoothing. Meanwhile, the preservation of edges is obtained by a range filter akin to the range filter found in a bilateral filter。

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核心数学原理：

其中 x 是图像输入， y 是图像输出。具体论文分析可见拙作：https://blog.csdn.net/bazhidao0031/article/details/81450815。

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效果图：

算法本身用于保边去噪，但高斯滤波器本身具有图片平滑效果，所以人脸磨皮效果更显著 (◕ܫ◕)

原图：

BEEPS:

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操作流程：

运行主文件 BEEPS.m --> 选取图片（如果找不到目标图片，记得改为所有文件）--> 根据图片效果优化参数