Target drop point measurement method based on building contour features

The invention relates to the technical field of drop point measurement, and provides a target drop point measurement method based on building contour features, and the method comprises the steps: measuring a building contour point coordinate and a predicted drop point coordinate through an RTK dotting device; selecting a shooting position of a camera, immediately stopping recording after flame appears in a camera picture, and calculating to obtain the number n of inversely deduced images according to the movement time of a target in a camera view field and a camera frame rate; screening the target detection range through a frame difference method; processing a differential image by combining an Otsu threshold segmentation algorithm, manually screening in sequence, selecting a key frame image at the moment that a target passes through a roof, and clicking and selecting a position of a building body contour point and a position of an actual target drop point on the image; calculating actual drop point coordinat