Research On Treatment Of Three-Dimensional For Special Features In Oblique Photography

Digital photogrammetry technology is now widely used for extracting various information of three-dimensional space objects from two-dimensional digital images.Among many technologies,photogrammetry technology has great advantages.It can acquire the data needed for 3D modeling in a large area with high efficiency and low cost,making 3D modeling through photogrammetry become the mainstream of today's 3D modeling.The trend,in which oblique photography can be combined with orthographic images of buildings and side images,is a good complement to the shortcomings of traditional photogrammetric techniques that lack side textures.Oblique photography uses an orthorect lens to acquire images simultaneously with four or more strabismus lenses.It can also obtain true side texture information while acquiring orthoimages,which greatly improves the efficiency of 3D modeling.Although tilted photogrammetric modeling has advantages such as quickness and convenience,there are many key technologies involved,such as image matching,air space,and so on.Each link will have an impact on the accuracy of the final model,which will cause the model to become pasted and broken.Holes and other issues,in response to these problems,this paper studies general buildings,complex buildings,and three special features such as trees,vehicles,and power poles.Different model optimization methods have been adopted.For general buildings,they are used automatically.The constant adjustment of software parameters and steps during modeling,and the use of 3ds Max design models for complex buildings are used for replacement and improvement.The MySQL database model and the 3ds Max design model are used for the three special features of trees,vehicles,and power poles.The alternative method is to improve the fineness of the model to a large extent for general buildings,to reproduce many characteristics and details of complex buildings,and to restore the true coordinates and visual effects of three special objects.Improved visual effects of the model compared to model effects automatically modeled by tilt photography software Excellent,more realistic detail,can produce some reference to some of the realities of production,planning and decision-making.