Joint Stroke Tracing and Correspondence for 2D Animation

IF 7.8 1区 计算机科学 Q1 COMPUTER SCIENCE, SOFTWARE ENGINEERING
Haoran Mo, Chengying Gao, Ruomei Wang
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引用次数: 0

Abstract

To alleviate human labor in redrawing keyframes with ordered vector strokes for automatic inbetweening, we for the first time propose a joint stroke tracing and correspondence approach. Given consecutive raster keyframes along with a single vector image of the starting frame as a guidance, the approach generates vector drawings for the remaining keyframes while ensuring one-to-one stroke correspondence. Our framework trained on clean line drawings generalizes to rough sketches and the generated results can be imported into inbetweening systems to produce inbetween sequences. Hence, the method is compatible with standard 2D animation workflow. An adaptive spatial transformation module (ASTM) is introduced to handle non-rigid motions and stroke distortion. We collect a dataset for training, with 10k+ pairs of raster frames and their vector drawings with stroke correspondence. Comprehensive validations on real clean and rough animated frames manifest the effectiveness of our method and superiority to existing methods.

二维动画的联合描边与对应
为了减轻用有序的矢量笔画重新绘制关键帧以实现自动夹帧的人力劳动,我们首次提出了一种联合笔画追踪和对应方法。该方法以连续的光栅关键帧和起始帧的单个矢量图像为指导,为剩余的关键帧生成矢量图,同时确保一一对应的笔画。我们在简洁线条图上训练的框架可通用于粗略草图,生成的结果可导入中间系统以生成中间序列。因此,该方法与标准的二维动画工作流程兼容。我们引入了自适应空间转换模块(ASTM)来处理非刚性运动和笔触变形。我们收集了一个用于训练的数据集,其中包含 10k+ 对光栅帧及其矢量图与笔画的对应关系。在真实的干净和粗糙的动画帧上进行的全面验证证明了我们方法的有效性以及优于现有方法的优势。
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来源期刊
ACM Transactions on Graphics
ACM Transactions on Graphics 工程技术-计算机:软件工程
CiteScore
14.30
自引率
25.80%
发文量
193
审稿时长
12 months
期刊介绍: ACM Transactions on Graphics (TOG) is a peer-reviewed scientific journal that aims to disseminate the latest findings of note in the field of computer graphics. It has been published since 1982 by the Association for Computing Machinery. Starting in 2003, all papers accepted for presentation at the annual SIGGRAPH conference are printed in a special summer issue of the journal.
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