Different people speak with diverse personalized speaking styles. Although existing one-shot talking head methods have made significant progress in lip sync, natural facial expressions, and stable head motions, they still cannot generate diverse speaking styles in the final talking head videos. To tackle this problem, we propose a one-shot style-controllable talking face generation framework. In a nutshell, we aim to attain a speaking style from an arbitrary reference speaking video and then drive the one-shot portrait to speak with the reference speaking style and another piece of audio. Specifically, we first develop a style encoder to extract dynamic facial motion patterns of a style reference video and then encode them into a style code. Afterward, we introduce a style-controllable decoder to synthesize stylized facial animations from the speech content and style code. In order to integrate the reference speaking style into generated videos, we design a style-aware adaptive transformer, which enables the encoded style code to adjust the weights of the feed-forward layers accordingly. Thanks to the style-aware adaptation mechanism, the reference speaking style can be better embedded into synthesized videos during decoding. Extensive experiments demonstrate that our method is capable of generating talking head videos with diverse speaking styles from only one portrait image and an audio clip while achieving authentic visual effects. Project Page: https://github.com/FuxiVirtualHuman/styletalk.
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Image super-resolution (SR) is a technique to recover lost high-frequency information in low-resolution (LR) images. Spatial-domain information has been widely exploited to implement image SR, so a new trend is to involve frequency-domain information in SR tasks. Besides, image SR is typically application-oriented and various computer vision tasks call for image arbitrary magnification. Therefore, in this paper, we study image features in the frequency domain to design a novel scale-arbitrary image SR network. First, we statistically analyze LR-HR image pairs of several datasets under different scale factors and find that the high-frequency spectra of different images under different scale factors suffer from different degrees of degradation, but the valid low-frequency spectra tend to be retained within a certain distribution range. Then, based on this finding, we devise an adaptive scale-aware feature division mechanism using deep reinforcement learning, which can accurately and adaptively divide the frequency spectrum into the low-frequency part to be retained and the high-frequency one to be recovered. Finally, we design a scale-aware feature recovery module to capture and fuse multi-level features for reconstructing the high-frequency spectrum at arbitrary scale factors. Extensive experiments on public datasets show the superiority of our method compared with state-of-the-art methods.
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In this work, we propose a semantic flow-guided two-stage framework for shape-aware face swapping, namely FlowFace. Unlike most previous methods that focus on transferring the source inner facial features but neglect facial contours, our FlowFace can transfer both of them to a target face, thus leading to more realistic face swapping. Concretely, our FlowFace consists of a face reshaping network and a face swapping network. The face reshaping network addresses the shape outline differences between the source and target faces. It first estimates a semantic flow (i.e., face shape differences) between the source and the target face, and then explicitly warps the target face shape with the estimated semantic flow. After reshaping, the face swapping network generates inner facial features that exhibit the identity of the source face. We employ a pre-trained face masked autoencoder (MAE) to extract facial features from both the source face and the target face. In contrast to previous methods that use identity embedding to preserve identity information, the features extracted by our encoder can better capture facial appearances and identity information. Then, we develop a cross-attention fusion module to adaptively fuse inner facial features from the source face with the target facial attributes, thus leading to better identity preservation. Extensive quantitative and qualitative experiments on in-the-wild faces demonstrate that our FlowFace outperforms the state-of-the-art significantly.
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深度强化学习在基于激光的碰撞避免有效的情况下取得了巨大的成功,因为激光器可以感觉到准确的深度信息而无需太多冗余数据,这可以在算法从模拟环境迁移到现实世界时保持算法的稳健性。但是,高成本激光设备不仅很难为大型机器人部署,而且还表现出对复杂障碍的鲁棒性,包括不规则的障碍,例如桌子,桌子,椅子和架子,以及复杂的地面和特殊材料。在本文中,我们提出了一个新型的基于单眼相机的复杂障碍避免框架。特别是,我们创新地将捕获的RGB图像转换为伪激光测量,以进行有效的深度强化学习。与在一定高度捕获的传统激光测量相比,仅包含距离附近障碍的一维距离信息,我们提议的伪激光测量融合了捕获的RGB图像的深度和语义信息,这使我们的方法有效地有效障碍。我们还设计了一个功能提取引导模块,以加重输入伪激光测量,并且代理对当前状态具有更合理的关注,这有利于提高障碍避免政策的准确性和效率。
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本文回顾了AIM 2022上压缩图像和视频超级分辨率的挑战。这项挑战包括两条曲目。轨道1的目标是压缩图像的超分辨率,轨迹〜2靶向压缩视频的超分辨率。在轨道1中,我们使用流行的数据集DIV2K作为培训,验证和测试集。在轨道2中,我们提出了LDV 3.0数据集,其中包含365个视频,包括LDV 2.0数据集(335个视频)和30个其他视频。在这一挑战中,有12支球队和2支球队分别提交了赛道1和赛道2的最终结果。所提出的方法和解决方案衡量了压缩图像和视频上超分辨率的最先进。提出的LDV 3.0数据集可在https://github.com/renyang-home/ldv_dataset上找到。此挑战的首页是在https://github.com/renyang-home/aim22_compresssr。
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多模式学习,尤其是大规模的多模式预训练,在过去的几年中已经迅速发展,并带来了人工智能(AI)的最大进步。尽管具有有效性,但了解多模式预训练模型的潜在机制仍然是一个巨大的挑战。揭示此类模型的解释性可能会使AI领域中新型学习范式的突破。为此,鉴于人脑的多模式性质,我们建议借助非侵入性脑成像技术(例如功能磁共振成像(fMRI))探索多模式学习模型的解释性。具体而言,我们首先提出了1500万个图像文本对预训练的新设计的多模式基础模型,该模型在各种认知下游任务中显示出强烈的多模式理解和概括能力。此外,从神经编码的角度来看(基于我们的基础模型),我们发现,与单峰相比,经过多模式训练的视觉和舌编码器都更像脑状。特别是,我们确定了许多大脑区域,其中多模式训练的编码器表现出更好的神经编码性能。这与现有有关探索大脑多感觉整合的研究的发现是一致的。因此,我们认为,多模式基础模型是神经科学家研究人脑中多模式信号处理机制的更合适的工具。我们的发现还证明了多模式基础模型作为理想的计算模拟器的潜力,以促进脑和大脑的AI研究。
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语义图像分割的最新进展极大地受益于更深入和更大的卷积神经网络(CNN)模型。与野生的图像分割相比,由于过度拟合,医疗图像本身和现有医疗数据集的属性都阻碍了更深入和更大的模型。为此,我们为自动端到端的医学图像分割提出了一种新型的两流UNET体系结构,其中强度值和梯度向量流(GVF)分别是每个流的两个输入。我们证明,具有更低级别的两流CNN具有极大的益处,从而使语义分割有益于不完美的医学图像数据集。我们提出的两流网络对流行的医学图像分割基准进行了培训和评估,结果与最新技术具有竞争力。该代码将很快发布。
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我们通过对修饰过程进行建模,以执行一系列新引入的可训练的神经色运算符来提出一种新型的图像修饰方法。神经颜色操作员模仿了传统颜色运算符的行为,并学习了Pixelwise Color Transformation,而其强度则由标量控制。为了反映颜色运算符的同构属性,我们采用了模棱两可的映射,并采用编码器编码器结构,该结构将非线性颜色转换映射到更简单的转换(即翻译),在高维空间中。通过分析全球图像统计数据,使用基于CNN的强度预测指标预测每个神经颜色操作员的标量强度。总体而言,我们的方法相当轻巧,并提供灵活的控件。实验和公共数据集的用户研究表明,与SOTA方法相比,我们的方法始终取得了最佳的结果。代码和数据将公开可用。
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为了开发有效的顺序推荐人,提出了一系列序列表示学习(SRL)方法来模拟历史用户行为。大多数现有的SRL方法都依赖于开发序列模型以更好地捕获用户偏好的明确项目ID。尽管在某种程度上有效,但由于通过明确建模项目ID的限制,这些方法很难转移到新的建议方案。为了解决这个问题,我们提出了一种新颖的通用序列表示方法,名为UNISREC。提出的方法利用项目的文本在不同的建议方案中学习可转移表示形式。为了学习通用项目表示形式,我们设计了一个基于参数美白和Experts的混合物增强的适配器的轻巧项目编码体系结构。为了学习通用序列表示,我们通过抽样多域负面因素介绍了两个对比的预训练任务。借助预训练的通用序列表示模型,我们的方法可以在电感或跨传导设置下以参数有效的方式有效地传输到新的推荐域或平台。在现实世界数据集上进行的广泛实验证明了该方法的有效性。尤其是,我们的方法还导致跨平台环境中的性能提高,显示了所提出的通用SRL方法的强可传递性。代码和预培训模型可在以下网址获得:https://github.com/rucaibox/unisrec。
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动态膜电位阈值是生物神经元的重要特性之一,是一种自发调节机制,可维持神经元稳态,即神经元的恒定总尖峰发射速率。因此,神经元的发射速率受动态尖峰阈值的调节,该阈值已在生物学上进行了广泛研究。机器学习社区中的现有工作不采用可行的尖峰阈值方案。这项工作旨在通过引入新型的生物启发的动态能量暂时性阈值(BDETT)方案来弥合这一差距。拟议的BDETT方案反映了两个可行的观察结果:动态阈值具有1)与平均膜电位的正相关,并且2)与前面的去极化速率有负相关。我们验证了拟议的BDETT对机器人障碍物避免的有效性和在正常条件和各种退化条件下的连续控制任务,包括嘈杂的观察,权重和动态环境。我们发现,在所有测试条件下,BDETT优于现有的静态和启发式阈值方法,我们确认提出的生物启发的动态阈值方案为复杂的现实世界任务中的SNN提供了可行的可行稳态。
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