Towards spatially varying gloss reproduction for 3D printing
Towards spatially varying gloss reproduction for 3D printing
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DOI：
10.1145/3414685.3417850
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Michal Piovarči;Michael Foshey;Vahid Babaei;S. Rusinkiewicz;W. Matusik;P. Didyk
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文献类型：
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作者：
Michal Piovarči;Michael Foshey;Vahid Babaei;S. Rusinkiewicz;W. Matusik;P. Didyk
3D 打印技术是制造具有高质量纹理的复杂形状的强大工具。光泽度仅次于颜色和形状，是物体最显着的视觉方面之一。不幸的是，使用最先进的 3D 打印机打印各种空间变化的光泽特性具有挑战性，因为它依赖于几何修改来实现所需的外观。常见的后处理步骤是使用现成的清漆来改变最终的光泽。自动化这一过程的主要困难在于清漆的物理特性，清漆的外观归因于高浓度的大颗粒，因此，它们不能轻易地用当前的 3D 彩色打印机打印。因此，使用当今的 3D 打印技术对光泽度特性进行细粒度控制在空间分辨率和可实现的光泽度范围方面都受到限制。我们解决了上述限制，并提出了基于能够喷射高粘度清漆的压电驱动针阀的新型印刷硬件。基于新的硬件设置，我们提出了用于控制给定 2.5 D 物体光泽度的完整流程，从打印机校准、材料选择，到具有空间变化反射率的模型的制造。此外，我们还讨论了与当前 3D 打印技术的潜在集成。除了作为 3D 打印的可行解决方案之外，我们的方法还提供了分离颜色和光泽制造的额外且重要的好处，这使得过程更加灵活，并实现高质量的颜色和光泽再现。
3D printing technology is a powerful tool for manufacturing complex shapes with high-quality textures. Gloss, next to color and shape, is one of the most salient visual aspects of an object. Unfortunately, printing a wide range of spatially-varying gloss properties using state-of-the-art 3D printers is challenging as it relies on geometrical modifications to achieve the desired appearance. A common post-processing step is to apply off-the-shelf varnishes that modify the final gloss. The main difficulty in automating this process lies in the physical properties of the varnishes which owe their appearance to a high concentration of large particles and as such, they cannot be easily deposited with current 3D color printers. As a result, fine-grained control of gloss properties using today's 3D printing technologies is limited in terms of both spatial resolution and the range of achievable gloss. We address the above limitations and propose new printing hardware based on piezo-actuated needle valves capable of jetting highly viscous varnishes. Based on the new hardware setup, we present the complete pipeline for controlling the gloss of a given 2.5 D object, from printer calibration, through material selection, to the manufacturing of models with spatially-varying reflectance. Furthermore, we discuss the potential integration with current 3D printing technology. Apart from being a viable solution for 3D printing, our method offers an additional and essential benefit of separating color and gloss fabrication which makes the process more flexible and enables high-quality color and gloss reproduction.