设计图像处理的常用方法灰度变换，傅里叶滤波，压缩，噪声与滤波，哈弗曼编码等知识。经过调试，直接运行。[适合初学者]-Commonly used method to design image processing gray-scale transform, Fourier filtering, compression, noise filtering, Hafu Man coding knowledge. After debugging, run directly