The Fourier transform is a classical method for analyzing signal singularities.
傅立叶变换是分析信号奇异性的传统方法。
The median filter which is a non-liner filter is a classical method of noise reduction.
中值滤波是一种非线性的滤波方法，是一种经典的降噪方法。
Watershed transform is a classical method of image segmentation in mathematical morphology.
流域变换是数学形态学中用于图象分割的一种经典方法。
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