用opencv2.0的程序，读取一幅lena的图片，并将其显示出来。然后缩小5倍，再显示。-With opencv2.0 program, read a lena image, and displays them. Then reduce the five-fold, and then display.

配置OpenCV使用的工程，用于检验是否配置成功。使用lena.jpg作为示例图片-Configuration engineering OpenCV used for checking whether the configuration is successful. Use lena.jpg as sample pictures