Application Research Of UAV Aerial Photography In 3D Modeling Of Grotto Cultural Relics

In the context of the era of artificial intelligence and big data,computer vision technology and photogrammetry have penetrated and merged with each other,prompting the rapid development of drone tilt photogrammetry technology.UAV equipped with multi-lens camera or digital single-lens tilt rotate the camera to acquire images from the air grotto inclined at different angles to produce a dense 3D point cloud and grid TIN model using modeling software,fast,efficient and cost-dimensional real grotto model.The real three-dimensional model can directly and digitally reproduce the true appearance of the grotto site,and provide direct basic data for the restoration and protection of the grotto.The main contents of this paper are as follows:(1)In order to realize the fine modeling of grottoes and temples,the overall technical scheme of data acquisition,precise field control,3d modeling and fine calibration of modeling was developed.(2)The close-up drone aerial photography scheme for grotto cultural relics is proposed.Single-sided data collection of the grottoes,designing the design plan of the inclined route of the drone along the facade,according to the shape of the specific grotto and the surrounding environment,the S-type horizontal upward course design and the N-type vertical upward course design were designed;the semi-solid cave and independent cave data collection For the design of each visible plane route,refer to the grotto single plane course design scheme.(3)Taking the Buddha statue in the cien temple scenic area of the big wild goose pagoda as the experimental object,according to the close-up drone aerial photography scheme of the close range uav,the oblique image of the Buddha was obtained at a close distance of 2 meters,and the 3d modeling method of oblique photography was deeply studied to analyze the accuracy and precision of the three-dimensional model of the Buddha.Under the comprehensive guarantee of each technical link,based on the analysis of the experimental data,the 3d model of the grotto cultural relic is realized with millimeter-level accuracy and fineness,which can provide references for related researches(4)The close-up drone aerial photography scheme is applied in the protection and restoration project of leshan giant Buddha.According to Buddha and the surrounding environment design for model S N type vertical and horizontal combination of multilayer route scheme,access to the Leshan giant Buddha high-precision tilt image,the establishment of a high precision Leshan giant Buddha live three-dimensional model,the most direct show Leshan giant Buddha heritage features and current situation,for the analysis of rock mass of degeneration to protect the main implement project to provide basic data.