用可微渲染自动为建筑简化模型生成高保真贴图。
DiffTex: Differentiable Texturing for Architectural Proxy Models
- 通过像素与贴图点的对应关系，加权融合多张照片颜色。
- 利用可微渲染优化混合参数，保证光影和视角一致性。
- 适合需要快速生成真实贴图的建筑可视化项目。
简化版代理模型常用于表示建筑结构，以降低存储需求并支持实时渲染。然而，几何简化会导致细微色彩与几何细节丢失，因此纹理需弥补这一缺陷。从无序注册照片中保留原始密集重建中的丰富纹理信息仍具挑战性。我们提出一种自动化方法，可在纹素级别上，从无序注册照片中生成建筑代理模型的真实纹理贴图。该方法建立UV贴图上的纹素与输入图像像素之间的对应关系，每个纹素的颜色由关联像素值加权混合得到。借助可微渲染，优化混合参数以确保光照一致性和视角一致性，同时保持纹理无缝衔接。实验结果表明，该方法在多种建筑模型和不同摄影条件下均有效且鲁棒，能够生成高质量纹理，保留视觉保真度与结构细节。
原文摘要 · Abstract (English)
Simplified proxy models are commonly used to represent architectural structures, reducing storage requirements and enabling real-time rendering. However, the geometric simplifications inherent in proxies result in a loss of fine color and geometric details, making it essential for textures to compensate for the loss. Preserving the rich texture information from the original dense architectural reconstructions remains a daunting task, particularly when working with unordered RGB photographs. We propose an automated method for generating realistic texture maps for architectural proxy models at the texel level from an unordered collection of registered photographs. Our approach establishes correspondences between texels on a UV map and pixels in the input images, with each texel's color computed as a weighted blend of associated pixel values. Using differentiable rendering, we optimize blending parameters to ensure photometric and perspective consistency, while maintaining seamless texture coherence. Experimental results demonstrate the effectiveness and robustness of our method across diverse architectural models and varying photographic conditions, enabling the creation of high-quality textures that preserve visual fidelity and structural detail.
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