Yuan Jiangping, Chen Chen, Yao Danyang, Chen Guangxue
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Institute for Visualization and Data Analysis, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
Polymers (Basel). 2020 Oct 29;12(11):2536. doi: 10.3390/polym12112536.
Material jetting is a high-precision and fast 3D printing technique for color 3D objects reproduction, but it also suffers from color accuracy and jagged issues. The UV inks jetting processes based on the polymer jetting principle have been studied from printing materials regarding the parameters in the default layer order, which is prone to staircase effects. In this work, utilizing the Mimaki UV inks jetting system with a variable layer thickness, a new framework to print a photogrammetry-based oil painting 3D model has been proposed with the tunable coloring layer sequence to improve the jagged challenge between adjacent layers. Based on contour tracking, a height-rendering image of the oil painting model is generated, which is further segmented and pasted to the corresponding slicing layers to control the overall printing sequence of coloring layers and white layers. The final results show that photogrammetric models of oil paintings can be printed vividly by UV-curable color polymers, and that the proposed reverse-sequence printing method can significantly improve the staircase effect based on visual assessment and color difference. Finally, the case of polymer-based oil painting 3D printing provides new insights for optimizing color 3D printing processes based on other substrates and print accuracy to improve the corresponding staircase effect.
材料喷射是一种用于彩色3D物体复制的高精度快速3D打印技术，但它也存在颜色准确性和锯齿问题。基于聚合物喷射原理的紫外油墨喷射工艺，已从打印材料的角度，针对默认层序中的参数进行了研究，而这种层序容易产生阶梯效应。在这项工作中，利用具有可变层厚的Mimaki紫外油墨喷射系统，提出了一种新的框架，用于打印基于摄影测量的油画3D模型，并采用可调的着色层顺序来改善相邻层之间的锯齿问题。基于轮廓跟踪，生成油画模型的高度渲染图像，进一步将其分割并粘贴到相应的切片层，以控制着色层和白色层的整体打印顺序。最终结果表明，通过紫外光固化彩色聚合物，可以生动地打印出油画的摄影测量模型，并且基于视觉评估和色差，所提出的逆序打印方法可以显著改善阶梯效应。最后，基于聚合物的油画3D打印案例为基于其他基材优化彩色3D打印工艺和打印精度以改善相应的阶梯效应提供了新的见解。
