The invention relates to the technical field of distribution network unmanned aerial vehicle autonomous tour-inspection navigation, in particular to a distribution network unmanned aerial vehicle tour-inspection autonomous navigation method based on GPS information and visual information, which comprises the following steps: acquiring a GPS and
smoothing projection coordinates, constructing a Thiessen region random index, optimizing a
route and acquiring a flight image, evaluating a risk and adjusting
exposure parameters, and generating a light environment value. According to the method, an environment model is constructed by fusing GPS information,
Gaussian projection is adopted to eliminate earth curvature errors,
moving average filtering is adopted to suppress
signal noise, Thiessen polygon is utilized to quantify routing inspection point and obstacle distribution, a
tornado optimization
algorithm is combined to generate an
optimal route, the shortest path without repetition and
obstacle avoidance are realized, and obstacles are identified based on a YOLOv12 model. A risk avoiding strategy is made according to the risk value, a
route is dynamically optimized, a light environment
fingerprint database is constructed, illumination change is predicted in combination with LSTM, aperture
shutter sensitivity and white balance are adjusted in a self-adaptive mode, image brightness and definition are optimized, and inspection efficiency and
data reliability are improved.