一种快速高效的无缝纹理匀光方法

针对倾斜影像三维重建后纹理间存在明显的色差、接缝且处理低效的问题，本文提出了一种快速高效的无缝纹理匀光方法。该方法首先对输入的去畸变影像进行影像增强预处理，通过对模型所有的顶点和边建立约束方程，求解得到每个顶点的颜色改正值；其次根据3个顶点插值得到三角面内部像素的颜色改正值；然后通过纹理扩充得到全局无色差的纹理块；最后对纹理块进行降分辨率泊松编辑。试验结果表明，采用本文方法进行纹理匀光处理，具有纹理块间无色差、接缝线处纹理过渡自然、计算速度更快等优势，能增强三维模型的可读性与改善三维模型的显示效果。

A fast and efficient method for smoothing seamless texture

Aiming at the problems of obvious chromatic aberrations, seams and inefficient processing between textures after 3D reconstruction of oblique images, a fast and efficient method of seamless texture homogenization is proposed. Firstly, this method performs image enhancement preprocessing on the input de-distorted image, and establishes constraint equations for all vertices and edges of the model, solves the color correction value of each vertex. Secondly, this method interpolates the three vertices to obtain the color correction value of the pixels inside the triangle. Then, a texture block with no global color difference is obtained by texture expansion. Finally, this method performs a reduced resolution Poisson editing on the texture block. The experimental results show that the method of this paper is used for texture homogenization processing, which has the advantages of no color difference between texture blocks, natural texture transition at the seam line, and faster calculation speed, which can enhance the readability of the 3D model and improve the display effect of the 3D model.