根据JPEG压缩编码的基本压缩原理编写JPEG仿真程序，利用MATLAB软件对程序进行运行调试，验证了JPEG压缩编码算法的可行性。通过比对输出图像压缩前后实际效果，探讨压缩比，峰值信噪比等评价图像数据压缩程度及压缩质量的关键参数，对JPEG压缩编码算法的实用性和优越性进行了研究。- I have JPEG compression in-depth study on the basic principles of image data compression based on JPEG emulator hands drawn flow chart, flow chart was prepared according to JPEG compression simulation program, and the simulation program using MATLAB software was debugged to verify the JPEG compression of image data compression is feasible.