We present an assistive system for clipart design by providing visual scaffolds from the unseen viewpoints. Inspired by the artists' creation process, our system constructs the visual scaffold by first synthesizing the reference 3D shape of the input clipart and rendering it from the desired viewpoint. The critical challenge of constructing this visual scaffold is to generate a reference 3Dshape that matches the user's expectation in terms of object sizing and positioning while preserving the geometric style of the input clipart. To address this challenge, we propose a user-assisted curve extrusion method to obtain the reference 3D shape.We render the synthesized reference 3D shape with consistent style into the visual scaffold. By following the generated visual scaffold, the users can efficiently design clipart with their desired viewpoints. The user study conducted by an intuitive user interface and our generated visual scaffold suggests that the users are able to design clipart from different viewpoints while preserving the original geometric style without losing its original shape.

中文翻译：

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ClipFlip：多视图剪贴画设计

我们通过从看不见的角度提供视觉脚手架，为剪贴画设计提供了一个辅助系统。受艺术家创作过程的启发，我们的系统通过首先合成输入剪贴画的参考 3D 形状并从所需的视点进行渲染来构建视觉支架。构建这个视觉脚手架的关键挑战是生成一个参考 3Dshape，在保留输入剪贴画的几何样式的同时，在对象大小和定位方面符合用户的期望。为了应对这一挑战，我们提出了一种用户辅助曲线挤压方法来获得参考 3D 形状。我们将合成的参考 3D 形状以一致的样式渲染到视觉支架中。通过跟随生成的视觉脚手架，用户可以根据自己的期望有效地设计剪贴画。通过直观的用户界面和我们生成的视觉支架进行的用户研究表明，用户能够从不同的角度设计剪贴画，同时保留原始几何样式而不会丢失其原始形状。