System and method for measuring unmanned aerial vehicle electrical line patrol on basis of images

The invention relates to a system and a method for measuring an unmanned aerial vehicle electrical line patrol on the basis of images. A box body comprises an unmanned aerial vehicle body, a camera, an image transmission unit, a wireless control unit, a ground control station and a reference target which is arranged on the ground; the reference target is used for calibrating a three-dimensional scene and building the corresponding relation of the practical size of the scene and picture pixel values; the image transmission unit is respectively connected with the camera and the ground control station, and the wireless control unit is respectively connected with the unmanned aerial vehicle body and the ground control station; and the ground control station controls the flying and hovering of the unmanned aerial vehicle body through the wireless control unit, the images of the camera are obtained through the image transmission unit, a camera visual three-dimensional model is built according to the reference target and the images of the camera, a reference line is selected, and whether a line is safe or not is judged according to a distance from the measurement point of the three-dimensional model to the reference line. When the unmanned aerial vehicle is hovered, coordinate system measurement is carried out on a monitoring picture of a camera through a three-dimensional calibration method, and thus, automatic distance measurement is realized.