说明：  图像处理的程序实现，基于matlab，但是没有直接采用matlab的相关语句。 内容包括：1.图像灰度直方图的显示、灰度直方图的计算 2.图像的几何变换——水平镜像图、垂直镜像图、水平错切图、垂直错切图 3.图像的平滑、锐化滤波 4.图像的阈值分割 运行程序的main函数，根据提示进行操作即可
(image processing program, based on Matlab, But not directly related to the use of Matlab statement. Contents include : 1. The image histogram, Histogram calculation 2. Image geometry transformation-- mirroring the level map, vertical image map, the level of cutting the wrong map vertical Shear Figure 3. the image smoothing, sharpening filter 4. Image segmentation threshold operational procedures for the main function, According to the instructions can operate)