无人机规划路径,同步获取城市建筑的精确结构和高清纹理。
Aerial Path Planning for Urban Geometry and Texture Co-Capture
- 基于2D轮廓图和飞行高度,自动规划拍摄路径。
- 多目标优化提升纹理保真度与几何精度,降低飞行成本。
- 适合低预算城市三维建模,兼顾真实感与效率。
近期图像采集与场景重建技术已能生成高质量的城市结构几何模型,但现有捕获方法常忽略纹理质量,导致纹理模型出现明显视觉伪影。本文研究在缺乏实地先验知识下的城市几何与纹理协同捕获问题,仅需目标区域的2D建筑轮廓图和安全飞行高度作为输入。提出一种创新的空中路径规划框架,旨在协同获取用于重建高保真几何与纹理的影像。为评估与指导视点规划,引入全面的纹理质量评估系统,包含两项专为建筑立面设计的新指标。首先,方法生成高质量的垂直俯视与水平平面视图,有效捕捉几何与纹理细节;随后采用多目标优化策略,联合最大化纹理保真度、提升几何精度并最小化飞行成本。此外,提出一种序列化路径规划算法,确保图像捕获过程中的纹理一致性。在大规模合成与真实世界城市数据集上的大量实验表明,该方法可有效生成适用于同步几何与纹理重建的图像集,以较低运营成本实现逼真纹理场景代理的构建。
原文摘要 · Abstract (English)
Recent advances in image acquisition and scene reconstruction have enabled the generation of high-quality structural urban scene geometry, given sufficient site information. However, current capture techniques often overlook the crucial importance of texture quality, resulting in noticeable visual artifacts in the textured models. In this work, we introduce the urban geometry and texture co-capture problem under limited prior knowledge before a site visit. The only inputs are a 2D building contour map of the target area and a safe flying altitude above the buildings. We propose an innovative aerial path planning framework designed to co-capture images for reconstructing both structured geometry and high-fidelity textures. To evaluate and guide view planning, we introduce a comprehensive texture quality assessment system, including two novel metrics tailored for building facades. Firstly, our method generates high-quality vertical dipping views and horizontal planar views to effectively capture both geometric and textural details. A multi-objective optimization strategy is then proposed to jointly maximize texture fidelity, improve geometric accuracy, and minimize the cost associated with aerial views. Furthermore, we present a sequential path planning algorithm that accounts for texture consistency during image capture. Extensive experiments on large-scale synthetic and real-world urban datasets demonstrate that our approach effectively produces image sets suitable for concurrent geometric and texture reconstruction, enabling the creation of realistic, textured scene proxies at low operational cost.
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