Xiong Xixian, Zhou Fugen, Bai Xiangzhi, Xue Bindang, Sun Changming
Opt Express. 2016 May 30;24(11):11345-75. doi: 10.1364/OE.24.011345.
The development of modern infrared applications require simulating thermal representations for targets of interest. However, generating geometric models for simulation has been a laborious, time-consuming work, which greatly limits the practical applications in real-world. In order to reduce the man-in-the-loop requirements, we devise a method that directly and semi-automatically simulates infrared signatures of real urban scenes. From raw meshes generated by multi-view stereo, we automatically produce a simplified watertight model through piecewise-planar 3D reconstruction. Model surface is subdivided into quality mesh elements to attach material attributes. For each element, heat balance equation is solved so as to render the whole scene by synthesizing the radiance distribution in infrared waveband. The credibility and effectiveness of our method are confirmed by comparing simulation results to the measured data in real-world. Our experiments on various types of buildings and large scale scene show that the proposed pipeline simulates meaningful infrared scenes while being robust and scalable.
现代红外应用的发展需要对感兴趣的目标进行热表征模拟。然而，生成用于模拟的几何模型一直是一项费力、耗时的工作，这极大地限制了在现实世界中的实际应用。为了减少人工干预，我们设计了一种直接且半自动地模拟真实城市场景红外特征的方法。从多视图立体生成的原始网格中，我们通过分段平面三维重建自动生成一个简化的封闭模型。将模型表面细分为高质量的网格单元以附加材料属性。对于每个单元，求解热平衡方程，以便通过合成红外波段的辐射分布来渲染整个场景。通过将模拟结果与现实世界中的测量数据进行比较，证实了我们方法的可信度和有效性。我们在各种类型的建筑物和大规模场景上的实验表明，所提出的流程能够模拟出有意义的红外场景，同时具有鲁棒性和可扩展性。
