The Research Of Texture Mapping Based On Multiple High Resolution Image

With the rapid development of photogrammetry and computer vision, people have a high demand for the3D visualization increasingly. The3D building model reconstruction is an important aspect of the construction of the digital city. In3D building reconstruction, texture is one of the key factors affecting realistic of the model.The purpose of the3D texture mapping is to get a3D model which can get high precision, automatic, high fidelity.and which is also the hot issue in the field of computer vision. In this paper we extract the feature line of texture image based on Hough transform and LSD (Line Segment Detector) feature line extraction method;and each triangular element of triangular mesh model is preferred based on multiple texture image fusion method from the multiple candidate which is selected by sight angle minimum candidate texture of triangular surface element method vector and then texture mapping on the mesh model.The work of this paper and the improvement is mainly divided into the following:(1)The matching research status texture mapping of airborne3D laser point cloud data and texture based image matching experiment, analyzes the existing problems in the process, and realize the texture mapping with sense of reality.(2)Introduces the source texture image, the high resolution remote sensing images of inclined building edge line and contour extraction based on the point cloud model. In this paper, based on the building facade texture images, linear detection method based on Hough transform and LSD were successfully extracted feature line building facade texture image.(3)In the OpenGL implementation of texture mapping based on the stage, with a texture image as the candidate texture, each triangle method based on image plane vector method and minimum angle principle to select the best texture image. Compared with the image fusion method based on the method of texture mapping, texture based on selecting optimal visual effect of texture mapping is improved, and solves the problem of mapping a texture image overlapping is not uniform.