中文说明：EZW算法（小波零数）测试各类图像实现，算法正确无误，同时计算了MSE、PSNR，实验结果准确无误，算法步骤清晰，同时有许多注释帮助各类学习者学习EZW。
English Description：
EZW algorithm (Wavelet zero tree) testing various types of images, the algorithm is correct, while calculating the MSE, PSNR, results are accurate, algorithm steps are clear, many of your comments help all learners at EZW.