中文说明：该项目的主要目的是要写入的MATLAB代码来实现对图像传输的安全性的各种步骤的JPEG压缩。还实施了系统的各种的JPEG解压缩步骤，诸如逆离散小波变换，量化，逆之字形和游程长度解码通过重构原始图像和在计算机系统上显示它来验证的相应压缩步骤的正确性。
English Description：
The main aim of the project was to write MATLABcodes to implement various steps of JPEG compression on the security of theimage transmission. Various JPEG decompression steps such as inverse DWT,dequantization, inverse zigzag and run length decoding were also implemented onthe system to verify the correctness of the corresponding compression steps byreconstructing the original image and displaying it on the computers orsystems.