Abstract. 3D shape measurement systems based on diffuse reflection of projected structured light are widely used. Unfortunately, this measurement principle does not work for uncooperative materials, i.e., materials with optical properties such as being glossy, transparent, absorbent, or translucent. Recently, it was shown that 3D reconstruction of an uncooperative object can be performed by a two-step process. In the first step, the object absorbs a projected thermal pattern. In the second step, after energy conversion, the object surface reemits a diffused thermal pattern according to Planck’s law. To achieve high 3D result qualities in short measurement times, projection parameters such as irradiance pattern and irradiation period must be optimized depending on optical and thermal material properties, e.g., complex spectral refractive index, thermal conductivity, specific heat capacity, or emissivity. Therefore, we have developed a simulation tool to describe the entire measurement process beginning with the projection unit, followed by the interaction of the irradiation with the measurement object, reemission of thermal radiation and recording unit, and finally the 3D reconstruction. In this contribution, we present our simulation tool, verify it with measurement results, and apply it to investigations of the influence of projection and material parameters on the 3D result quality.

中文翻译：

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在模拟和实验中通过投影非周期性热模式对具有非合作表面的物体进行 3D 形状测量

摘要。基于投射结构光漫反射的 3D 形状测量系统被广泛使用。不幸的是，这种测量原理不适用于不合作的材料，即具有诸如光泽、透明、吸收性或半透明等光学特性的材料。最近，表明可以通过两步过程来执行不合作对象的 3D 重建。在第一步中，物体吸收投射的热模式。第二步，在能量转换后，物体表面根据普朗克定律重新发出扩散的热模式。为了在较短的测量时间内获得高质量的 3D 结果，必须根据光学和热材料特性（例如复杂的光谱折射率、热导率、比热容或发射率。因此，我们开发了一个仿真工具来描述从投影单元开始的整个测量过程，然后是辐射与测量对象的相互作用、热辐射的再发射和记录单元，最后是 3D 重建。在这篇文章中，我们展示了我们的模拟工具，用测量结果对其进行验证，并将其应用于投影和材料参数对 3D 结果质量影响的研究。再发射热辐射和记录单元，最后是 3D 重建。在这篇文章中，我们展示了我们的模拟工具，用测量结果对其进行验证，并将其应用于投影和材料参数对 3D 结果质量影响的研究。再发射热辐射和记录单元，最后是 3D 重建。在这篇文章中，我们展示了我们的模拟工具，用测量结果对其进行验证，并将其应用于投影和材料参数对 3D 结果质量影响的研究。