Research On Evaluation Method Of Empty Three Accuracy And 3D Model Accuracy Of Tilting Photogrammetry

The traditional three-dimensional modeling technology existing problem such as low efficiency?high cost?texture data deficiencies,complex data processing.Oblique photography technology Get feature of image information from different perspectives to make up for the defect of traditional three-dimensional modeling technology,provides the high efficiency,low cost,etc.In recent years,Oblique photography in the international field of surveying and mapping is tilted photogrammetry technology developed a new technology.But at the moment,there are still problems with oblique photography technology.Such as for 3 d model reconstruction based on tilt photogrammetry has not mature,the precision analysis of tilt aerial triangulation photogrammetry is not unified conclusion,3D scene structures than real distort deformation problems currently lack of precision evaluation for single building in detail structure.For the above problems,this article launches the research from the following content.(1)Expound the principle oftilt photogrammetry technology rebuild 3D model,take real 3D scene of Tianjin normal university for example,the three-dimensional scene of real production,Use SONY ILCE-QX1 multiview aerial instrument system for image data and GPS-RTK field measurements of ground control points data build real coordinates of 3D scene through ContextCapture software.(2)According to the characteristics of the tilt images,analysis the effect of different attitude image to three encryption precision,empty three encryption process the vertical images,vertical and inclined images respectively(3)The analysis of different control point layout scheme of oblique photography measurement affects the accuracy of aerial triangulation analysis,choose the best three encryption results into the process of reconstruction of 3D scene.Through the GPS-RTK measurement 50 checkpoints,evaluate the overall precision of 3D scene.(4)with computer aided modeling technology to build 3D model as a standard,evaluation of true 3D scene monomer detail structure of the precision of the model.Measurement by oblique photography for the production of high precision,large scale 3D model products provide theoretical basis and practical guidance.