Positioning correction method for improving terrain reference navigation precision based on visual assistance technology

The invention discloses a positioning correction method for improving terrain reference navigation precision based on a visual assistance technology, which comprises the following steps: in the flight process of an aircraft, providing reference information by using a digital map, improving the precision of the reference information through visual assistance, and jointly assisting in correcting an inertial navigation system to achieve the purposes of improving the navigation precision, and enhance the reliability of the system is enhanced, and the like. 本发明公开了基于视觉辅助技术对地形参考导航精度提升定位修正方法，在航空器飞行过程中，用数字地图提供参考信息，通过视觉辅助对其参考信息进行精度提升，共同辅助校正惯性导航系统，达到提高导航精度，増强系统可靠性等目标的一种精确导航的技术。