说明：  1.验证韦伯比，同时对比效应；2.显示马赫带，观察马赫效应；3.练习图像读写命令imread和imwrite并进行图像文件格式间的转换；4.示一幅自定义格式的裸图像Miss America；5.显示JPG，BMP，PCX等格式的图像文件；6.编写程序完成颜色空间的转换RGB -> YUV -> RGB；7.显示条状图、旋转45度的条状图、十字图、点图及其频谱；8.对Miss America 进行DFT，DCT变换，显示变换后图像的系数图像；9.对变换后的系数进行量化，观察不同量化步长时的显示效果；10.利用二维小波分析对图像作2层小波分解,并在此基础上提取各层的低频信息。
(1. verify Weber ratio, and contrast effect; 2. show Maher band, observe the Maher effect; 3. practice image reading and writing commands imread and imwrite and conversion of image file format; 4. show a custom format bare image Miss America; 5. display JPG, BMP, PCX and other format image files; 6. writing program completes the color empty The conversion between RGB - > YUV - > RGB; 7. display bar graphs, rotation 45 degrees bar, cross diagram, point map and its spectrum; 8. DFT, DCT transformation of Miss America, display coefficient images of transformed images; 9. to quantify the coefficients after transformation, observe the display effect of different quantization steps; 10. use two dimensional wavelets The image is decomposed by 2 layers of wavelet, and the low frequency information of each layer is extracted based on this.)