Stroke Transfer: Example-based Synthesis of Animatable Stroke Styles
Stroke Transfer: Example-based Synthesis of Animatable Stroke Styles
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DOI：
10.1145/3528233.3530703
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发表时间：
2022-07
期刊：
影响因子：
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通讯作者：
Hideki Todo;Kunihiko Kobayashi;Jin Katsuragi;Haruna Shimotahira;S. Kaji;Yonghao Yue
中科院分区：
文献类型：
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作者：
Hideki Todo;Kunihiko Kobayashi;Jin Katsuragi;Haruna Shimotahira;S. Kaji;Yonghao Yue
我们提出了笔触转换，这是一种在视点、光照条件和物体形状变化下，基于实例的动画场景笔触合成方法。我们引入笔画场来指导笔画的生成，笔画场由笔画的方向、长度、宽度和颜色等空间变化属性组成。笔画被合成为笔画场的积分曲线。从本质上讲，我们将构成艺术笔触的元素分为特定于风格的可转移元素和实例固有元素。为了生成笔画域，我们首先计算一组反映实例固有元素的向量域，然后使用从示例中学习到的特定于样式的权重函数将它们组合起来，并在各种对象之间共享的代理特征空间中计算权重。使用我们的方法渲染的动画捕捉时变的视点、光照条件和物体形状，以及以范例形式给出的艺术风格。
We present stroke transfer, an example-based synthesis method of brushstrokes for animated scenes under changes in viewpoint, lighting conditions, and object shapes. We introduce stroke field for guiding the generation of strokes, consisting of spatially varying attributes of strokes, namely, their orientations, lengths, widths, and colors. Strokes are synthesized as the integral curves of the stroke field. In essence, we separate elements that constitute the artistic stroke into style-specific transferable elements and instance-intrinsic ones. To generate the stroke field, we first compute a set of vector fields that reflect the instance-intrinsic elements and then combine them using style-specific weight functions learned from exemplars, with the weights computed in a proxy feature space shared among a variety of objects. The rendered animation using our method captures time-varying viewpoint, lighting conditions, and object shapes, as well as the artistic style given in the form of exemplars.