3D打印的阴影：用于双挤出熔融沉积建模的基于线的半色调
Hatching for 3D prints: line-based halftoning for dual extrusion fused deposition modeling
摘要：
这项工作提出了一种半色调技术来制造3D物体的外观连续灰度图像的熔融沉积成型（FDM）打印机。虽然基于液滴的抖动是一种常见的半色调技术，但这不适用于FDM打印，因为FDM通过在半连续路径中挤出材料来构建对象。基于线条的半色调原理称为“阴影”，适用于FDM打印中自然出现的线条图案，这些线条图案以逐层方式构建。所提出的半色调技术不受现有技术面临的挑战的限制;现有FDM着色技术极大地影响表面几何形状，并且随着表面斜率偏离垂直而恶化，或者极大地影响印刷过程的基本参数，从而影响所得产品的结构特性。此外，所提出的技术对打印时间几乎没有影响。在一台双喷嘴FDM打印机上的实验表明了良好的效果。未来的工作需要校准感知的音调。
英文摘要：
This work presents a halftoning technique to manufacture 3D objects with the appearance of continuous grayscale imagery for Fused Deposition Modeling (FDM) printers. While droplet-based dithering is a common halftoning technique, this is not applicable to FDM printing, since FDM builds up objects by extruding material in semi-continuous paths. The line-based halftoning principle called 'hatching' is applied to the line patterns naturally occuring in FDM prints, which are built up in a layer-by-layer fashion. The proposed halftoning technique isn't limited by the challenges existing techniques face; existing FDM coloring techniques greatly influence the surface geometry and deteriorate with surface slopes deviating from vertical or greatly influence the basic parameters of the printing process and thereby the structural properties of the resulting product. Furthermore, the proposed technique has little effect on printing time. Experiments on a dual-nozzle FDM printer show promising results. Future work is required to calibrate the perceived tone.
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