arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.09485cs.CVcs.GR
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PIE:用于语义控制的肖像图像嵌入

PIE: Portrait Image Embedding for Semantic Control

Max Planck Institute for Informatics(马克斯·普朗克信息学研究所);Technical University of Munich(慕尼黑工业大学);Stanford University(斯坦福大学)

Ayush Tewari, Mohamed Elgharib, Mallikarjun B R., Florian Bernard, Hans-Peter Seidel, Patrick Pérez, Michael Zollhöfer, Christian Theobalt

摘要:

人像图像的编辑是一个非常流行和重要的研究课题,具有各种各样的应用。为了便于使用,应该通过语义上有意义的参数化来提供控制,这类似于计算机动画控制。绝大多数现有技术不提供这种直观且细粒度的控制,或者仅允许对单个隔离的控制参数进行粗略编辑。最近,高质量的语义控制编辑已经被证明,但仅在合成创建的StyleGAN图像上。我们提出了在StyleGAN的潜在空间中嵌入真实肖像图像的第一种方法,该方法允许直观地编辑图像中的头部姿势,面部表情和场景照明。基于StyleRig实现参数空间中的语义编辑,StyleRig是一种预训练的神经网络,其将3D可变形人脸模型的控制空间映射到GAN的潜在空间。我们设计了一个新的分层非线性优化问题,以获得嵌入。身份保留能量项允许空间相干编辑,同时保持面部完整性。我们的方法以交互式帧速率运行,因此允许用户探索可能的编辑空间。我们在一组广泛的肖像照片上评估我们的方法,将其与当前最先进的方法进行比较,并在消融研究中验证其组件的有效性。

英文摘要:

Editing of portrait images is a very popular and important research topic with a large variety of applications. For ease of use, control should be provided via a semantically meaningful parameterization that is akin to computer animation controls. The vast majority of existing techniques do not provide such intuitive and fine-grained control, or only enable coarse editing of a single isolated control parameter. Very recently, high-quality semantically controlled editing has been demonstrated, however only on synthetically created StyleGAN images. We present the first approach for embedding real portrait images in the latent space of StyleGAN, which allows for intuitive editing of the head pose, facial expression, and scene illumination in the image. Semantic editing in parameter space is achieved based on StyleRig, a pretrained neural network that maps the control space of a 3D morphable face model to the latent space of the GAN. We design a novel hierarchical non-linear optimization problem to obtain the embedding. An identity preservation energy term allows spatially coherent edits while maintaining facial integrity. Our approach runs at interactive frame rates and thus allows the user to explore the space of possible edits. We evaluate our approach on a wide set of portrait photos, compare it to the current state of the art, and validate the effectiveness of its components in an ablation study.

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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