中文说明： 使用fspecial函数生成二维Gaussian低通滤波器，绘制其时域和频域一维、二维和三维图形，了解Gaussian滤波器 的时域特性（PSF模型）和频域特性（模糊功能）。 使用Gaussian滤波器对清晰图像滤波，建立模糊（退化）图像模型，讨论Gaussian滤波器参数对模糊效果的影响。
English Description：
Use fspecial Function to generate a two-dimensional Gaussian Low-pass filter, drawing its time-domain and frequency-domain one, two and three dimensional graphics, understanding Gaussian The temporal characteristics of the filter ( PSF Model) and frequency-domain characteristics (fuzzy). Use Gaussian Clearer image filter for filtering, a fuzzy (degradation) image model, discussed Gaussian Influence of filter parameter on the blur effect.