面向建筑彩绘纹样的高质量贴图重构方法  

High-quality texture reconstruction method for architectural painted patterns

作　　者：龚辰晨 曹力[1,2] 张腾腾 吴奕泽 GONG Chenchen;CAO Li;ZHANG Tengteng;WU Yize(School of Computer and Information(Artificial Intelligence College),Hefei University of Technology,Hefei Anhui 230009,China;Engineering Research Center of the Ministry of Education for Safety Critical Industrial Measurement and Control Technology,Hefei University of Technology,Hefei Anhui 230009,China)

机构地区：[1]合肥工业大学计算机与信息学院(人工智能学院),安徽合肥230009 [2]合肥工业大学安全关键工业测控技术教育部工程研究中心,安徽合肥230009

出　　处：《图学学报》2024年第4期804-813,共10页Journal of Graphics

基　　金：国家自然科学基金项目(61602146,62272142);安徽省重点研究与开发项目(202104e11020006);青海省科技转化项目(2022-QY-203)。

摘　　要：建筑彩绘是绘制在木构建筑上的精美图案。在古建筑进行数字化展示时,通用处理方法是以网格模型加单张纹理的模式进行绘制。由于单张纹理贴图分辨率有限,无法展示所有细节,且常见的纹理为位图格式,使用多张高分辨率贴图会导致显存占用过大,致使数据交换效率变低。为解决上述难题,提出了一种高质量贴图重构方法。利用彩绘图案的自相似性和对称性,提取彩绘纹样最小不重复单元及版式信息。使用矢量数据表示最小图元并构建纹样素材库。在编辑三维模型的彩绘纹案时,通过复用图元并配置相应变换参数编码生成描述性文件,用以完成彩绘内容的渲染。实验结果表明,该方法有效减少了重复信息的存储,且提供更为清晰的细节,更好地进行数字化展示。Architectural painted patterns refer to the exquisite patterns painted on wooden structures.When digitizing ancient architecture,the general solution involves using a mesh combined with a single texture map for rendering.However,due to the limited resolution of a single texture map,not all details can be adequately displayed.Moreover,common textures are stored pixel by pixel,and using multiple high-resolution texture maps can lead to excessive graphics processing unit memory usage,resulting in lower data exchange efficiency.To address the aforementioned challenges,a method for high-quality texture map reconstruction was proposed.This method employed the self-similarity and symmetry of the painted patterns,thereby extracting the smallest unduplicated pattern elements and layout information of the painted patterns.Vectorized data was utilized to represent the smallest pattern elements,and a library of pattern elements was constructed.When editing the painted patterns of a 3D model,these pattern elements were reused and configured with corresponding transformation parameters,which were encoded into descriptive files to complete the rendering of the painted content.Experimental results demonstrated that the proposed method could effectively reduce the storage of redundant information and provide a better presentation of details,thus enhancing realistic rendering.

关 键 词：真实感绘制 图像矢量化表达 版式结构 纹理压缩 建筑彩绘纹样 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TU851[自动化与计算机技术—计算机科学与技术]