Digital light processing stereolithography is a promising technique for 3D printing. However, it offers little control over the surface appearance of the printed object. The printing process is typically layered, which leads to aliasing artefacts that affect surface appearance. An antialiasing option is to use greyscale pixel values in the layer images that we supply to the printer. This enables a kind of subvoxel growth control. We explore this concept and use it for editing surface microstructure. In other words, we modify the surface appearance of a printed object by applying a greyscale pattern to the surface voxels before sending the cross‐sectional layer images to the printer. We find that a smooth noise function is an excellent tool for varying surface roughness and for breaking the regularities that lead to aliasing. Conversely, we also present examples that introduce regularities to produce controlled anisotropic surface appearance. Our hope is that subvoxel growth control in stereolithography can lead 3D printing towards customizable surface appearance. The printing process adds what we call ground noise to the printed result. We suggest a way of modelling this ground noise to provide users with a tool for estimating a printer's ability to control surface reflectance.

中文翻译：

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使用数字光处理进行 3D 打印的微观结构控制

数字光处理立体光刻技术是一种很有前途的 3D 打印技术。但是，它对打印对象的表面外观几乎没有控制。印刷过程通常是分层的，这会导致影响表面外观的锯齿伪影。抗锯齿选项是在我们提供给打印机的图层图像中使用灰度像素值。这实现了一种亚体素增长控制。我们探索了这个概念并将其用于编辑表面微观结构。换句话说，我们通过在将横截面层图像发送到打印机之前将灰度图案应用于表面体素来修改打印对象的表面外观。我们发现平滑噪声函数是改变表面粗糙度和打破导致混叠的规律的绝佳工具。反过来，我们还提供了一些示例，这些示例介绍了产生受控各向异性表面外观的规律。我们希望立体光刻中的亚体素生长控制可以使 3D 打印朝着可定制的表面外观发展。打印过程在打印结果中添加了我们所说的地面噪声。我们建议对这种地面噪声进行建模，以便为用户提供一种工具来估计打印机控制表面反射率的能力。