无人机视觉系统用于飞机着陆时的自主控制，基于图像识别将目标图像的灰度信息提取，校正，最终实现目标定位，指导飞机在目标区域安全降落。-UAV vision system is used for autonomous control of aircraft landing, based on image recognition will be the target image of the gray information extraction, correction, and ultimately