利用opencv将一幅图拷贝到另一幅图的指定区域，使得两幅图合并，使用了cvSetImageROI和cvCopy函数，在图像匹配中可能会用到这个方面的功能-Opencv will use a chart to another copy of a drawing of the designated area, making the merger of two plans, the use of the cvSetImageROI and