文件包含三个主程序，和相关图像，三个主程序分别为computer1，computer2，computer3
computer1对图像进行了灰度化，保存等实现；
computer2对图像进行了傅里叶变换，离散余旋变化，二层小波变化及重构等，并对图像进行三层小波变换，分别将HL，LH，HH三个子带置零都重构；
computer3实现了图像直方图均衡化，并对图像进行了同态滤波。(The file contains three main programs, and related images, three main programs are computer1, computer2, computer3
Computer1 on the image of the gray scale, save and other implementations;
The wavelet transform of the image is carried out, and the three subbands of HL, LH and HH are reconstructed respectively by Fourier transform, discrete cosine transform, two - layer wavelet transform and reconstruction.
Computer3 to achieve the image histogram equalization, and the image was homomorphic filtering.)