arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.14675cs.CVcs.LG
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基于文本描述的合成动画

Synthesis of Compositional Animations from Textual Descriptions

German Research Center for Artificial Intelligence (DFKI)(德国人工智能研究中心(DFKI));Saarland Informatics Campus(萨尔兰信息学园区);Max-Planck Institute for Informatics(马克斯·普朗克信息学研究所)

Anindita Ghosh, Noshaba Cheema, Cennet Oguz, Christian Theobalt, Philipp Slusallek

摘要:

“我们如何从电影剧本中制作3D人物的动画,或者通过简单地告诉他们我们希望他们做什么来移动机器人?”“我们能在创造一个句子的同时,还能从中产生合理的动作吗?“这些问题需要从长远来看得到回答,因为该领域仍处于起步阶段。受这些问题的启发,我们提出了一种新的技术,用于生成组合动作,处理复杂的输入句子。我们的输出是一个3D姿势序列,描述了输入句子中的动作。我们提出了一个层次化的双流序列模型,以探索自然语言句子和与给定运动相对应的3D姿态序列之间的更精细的联合级映射。我们学习了两种运动的多方面表示-上半身和下半身运动各一种。我们的模型可以生成合理的姿势序列,描述单个动作的短句以及描述多个顺序和叠加动作的长组成句。我们在公开的KIT运动语言数据集上评估我们提出的模型,该数据集包含带有人类注释的句子的3D姿态数据。实验结果表明,我们的模型先进的国家的最先进的基于文本的运动合成的客观评价幅度为50%。基于用户研究的定性评估表明,我们的合成运动被认为是最接近地面实况运动捕获的短句和合成句子。

英文摘要:

"How can we animate 3D-characters from a movie script or move robots by simply telling them what we would like them to do?" "How unstructured and complex can we make a sentence and still generate plausible movements from it?" These are questions that need to be answered in the long-run, as the field is still in its infancy. Inspired by these problems, we present a new technique for generating compositional actions, which handles complex input sentences. Our output is a 3D pose sequence depicting the actions in the input sentence. We propose a hierarchical two-stream sequential model to explore a finer joint-level mapping between natural language sentences and 3D pose sequences corresponding to the given motion. We learn two manifold representations of the motion -- one each for the upper body and the lower body movements. Our model can generate plausible pose sequences for short sentences describing single actions as well as long compositional sentences describing multiple sequential and superimposed actions. We evaluate our proposed model on the publicly available KIT Motion-Language Dataset containing 3D pose data with human-annotated sentences. Experimental results show that our model advances the state-of-the-art on text-based motion synthesis in objective evaluations by a margin of 50%. Qualitative evaluations based on a user study indicate that our synthesized motions are perceived to be the closest to the ground-truth motion captures for both short and compositional sentences.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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