在3维场景里漫游,纹理映射是展示场景真实感的主要手段。纹理通常由照片获得,但由于某些不可抗拒的原因,只能得到透视变形的纹理图像。讨论了如何纠正平面纹理的透视变形,及其相应的纹理映射,其过程是在两视图重建的基础上,对原平面进行投影变换,并用插值方法获得纹理,从而映射到模型上。在投影变换的过程中对已有算法进行了改进以达到较好的效果,并对实验结果进行了分析和讨论。该方法适用于构建虚拟的3维场景及去除由于透视变形而产生的图像模糊。

When roaming in a 3D virtual scene,texture mapping is a main tactic to display the reality of the scene.But for some special cases i.e.the position of the object or other difficulties which can't be overcome,the texture with perspective distortion is got.Here how to rectify the plain texture to remove perspective distortion and corresponding texture mapping are discussed.This process is as follows: applying projective transformation on the plane,using interpolation method to acquired texture,and then mapping it on the model.This is based on reconstruction from two views.Some existing algorithms are used and some changes are made to achieve a good result during projective transformation.Then the result of test is analyzed and discussed.This method can be used to construct a virtual scene,or clarify the blur of the photos for the reason of perspective distortion.