一种基于颜色差异的全局纹理优化方法

A method of global texture optimization based on color difference

针对目前的纹理优化方法存在的颜色变化不一致、纹理割裂等难题,提出一种基于纹理贴片的颜色差异的全局纹理优化方法。利用该方法优化三维城市模型的表面纹理,首先获取纹理贴片边界点的颜色值;然后利用基于纹理贴片颜色差异的全局纹理优化方法求取三维网格顶点的颜色改正值;最后根据三角形的顶点,对三角形进行栅格化,并利用重心原则对栅格化后的每一个像素进行内插,以获取相应的颜色改正值,并叠加到原始影像上。为证明方法的可行性和有效性,使用城市地区的无人机倾斜影像数据进行城市模型的纹理优化,实验结果表明,该方法具有纹理真实、色彩一致、细节明显等优势。

In order to solve the above problems,texture optimization of 3D city model texture data is needed to solve the problem of inconsistent color,unclear details and strong sense of authenticity in three-dimensional urban model texture mapping.In order to solve the problem of uneven color change and texture segmentation in texture optimization,a global texture optimization method based on texture patch color difference is proposed.This method is used to optimize the surface texture of the 3D city model.First,the color value of the boundary point of the texture patch is obtained.Then the color correction value of the vertex of the 3D mesh is obtained by the global texture optimization method based on the color difference of the texture patch.Finally,the triangle is raster and the center of gravity is used to make use of the center of gravity according to the vertex of the triangle.Each pixel after rasterization is interpolated to get the corresponding color correction value and stack it onto the original image.In order to prove the feasibility and effectiveness of this method,this paper uses the unmanned aerial vehicle(UAV)image data in urban area to optimize the texture of the city model.The experimental results show that the method has the advantages of real texture,uniform color and obvious details.