利用v4l显示jpeg图片，环境是mini2440+t35，测试通过 可运行流畅-Using v4l display jpeg images, the environment is mini2440+ t35, the test can be run smoothly by

用c写的测试jpeg和opencv库的程序，在mini2440上运行，运行安装libjpeg和opencv-Jpeg with c written test and the opencv library program running in the mini2440