一种倾斜摄影实景三维模型单体化方法

A Method of Achieving Single Body for Real 3D Model Generated by Oblique Photography

倾斜摄影三维模型的单体化是开展倾斜摄影应用的关键技术。本文提出了一种基于底面纹理的倾斜摄影模型单体化方法,通过获取单体化对象的底面信息,生成底面轮廓纹理,得到底面模型,进而在三维场景中建立RTT相机,获取底面模型的RTT纹理,最后利用投影纹理技术,结合GPU编程,将RTT纹理投射在倾斜摄影实景三维模型上,实现倾斜模型的动态单体化。通过底面模型的选中,实现单体化模型的选中及属性挂接等单体化应用,通过着色器中提供的一致性变量,实现单体化模型的颜色修改、显隐和场景挖洞操作。

Achieving real 3D single model generated by oblique photography is a key technology to carry out the application of oblique photography.In this paper, a method based on the bottom texture to get real 3D single model is proposed. By acquiring the bottom information of a single object,the bottom contour texture is generated, and the bottom model is obtained, and then a RTT camera is built in the three-dimensional scene to get RTF texture of the bottom model. Finally, using projective texture mapping technology and GPU programming, the RTF texture is projected onto the 3D model of oblique photography, and the dynamic visualization of the real 3D single model is realized. Through the selection of the bottom surface model to select the real 3D single model, and then the connection of attributes and other applications based on single model are realized.Through the uniform variables provided by GPU shader language, the color modification, display and concealment of the model and operation of scene digging are realized.