中文说明： 本代码是由matlab语言编写，实现了sobel边缘提取和guass噪声消除的原理，对于matlab和图像处理的初学者来说，本代码很简单，易懂易理解，是一个有用的教程。
English Description：
The code is written by the MATLAB language, the Sobel edge detection and Guass noise elimination principle, for MATLAB and image processing for beginners, the code is simple, easy to understand, is a useful tutorial.