虽然先前以语音为导向的说话面部生成方法在改善合成视频的视觉质量和唇部同步质量方面取得了重大进展,但它们对唇部运动的关注较少,从而极大地破坏了说话面部视频的真实性。是什么导致运动烦恼,以及如何减轻问题?在本文中,我们基于最先进的管道对运动抖动问题进行系统分析,该管道使用3D面表示桥接输入音频和输出视频,并通过一系列有效的设计来改善运动稳定性。我们发现,几个问题可能会导致综合说话的面部视频中的烦恼:1)输入3D脸部表示的烦恼; 2)训练推导不匹配; 3)视频帧之间缺乏依赖建模。因此,我们提出了三种有效的解决方案来解决此问题:1)我们提出了一个基于高斯的自适应平滑模块,以使3D面部表征平滑以消除输入中的抖动; 2)我们在训练中对神经渲染器的输入数据增加了增强的侵蚀,以模拟推理中的变形以减少不匹配; 3)我们开发了一个音频融合的变压器生成器,以模拟视频帧之间的依赖性。此外,考虑到没有现成的指标来测量说话面部视频中的运动抖动,我们设计了一个客观的度量标准(运动稳定性指数,MSI),可以通过计算方差加速度的倒数来量化运动抖动。广泛的实验结果表明,我们方法对运动稳定的面部视频生成的优越性,其质量比以前的系统更好。
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Preys in the wild evolve to be camouflaged to avoid being recognized by predators. In this way, camouflage acts as a key defence mechanism across species that is critical to survival. To detect and segment the whole scope of a camouflaged object, camouflaged object detection (COD) is introduced as a binary segmentation task, with the binary ground truth camouflage map indicating the exact regions of the camouflaged objects. In this paper, we revisit this task and argue that the binary segmentation setting fails to fully understand the concept of camouflage. We find that explicitly modeling the conspicuousness of camouflaged objects against their particular backgrounds can not only lead to a better understanding about camouflage, but also provide guidance to designing more sophisticated camouflage techniques. Furthermore, we observe that it is some specific parts of camouflaged objects that make them detectable by predators. With the above understanding about camouflaged objects, we present the first triple-task learning framework to simultaneously localize, segment, and rank camouflaged objects, indicating the conspicuousness level of camouflage. As no corresponding datasets exist for either the localization model or the ranking model, we generate localization maps with an eye tracker, which are then processed according to the instance level labels to generate our ranking-based training and testing dataset. We also contribute the largest COD testing set to comprehensively analyse performance of the COD models. Experimental results show that our triple-task learning framework achieves new state-of-the-art, leading to a more explainable COD network. Our code, data, and results are available at: \url{https://github.com/JingZhang617/COD-Rank-Localize-and-Segment}.
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尽管最近的生成面部先验和几何事物最近证明了盲面修复的高质量结果,但忠实于投入的细粒度细节仍然是一个具有挑战性的问题。由基于经典词典的方法和最近的矢量量化(VQ)技术激励,我们提出了一种基于VQ的面部恢复方法-VQFR。 VQFR利用从高质量面孔中提取的高质量低级特征银行,因此可以帮助恢复现实的面部细节。但是,通过忠实的细节和身份保存,VQ代码簿的简单应用无法取得良好的结果。因此,我们进一步介绍了两个特殊的网络设计。 1)。我们首先研究了VQ代码簿中的压缩补丁大小,并发现使用适当的压缩补丁大小设计的VQ代码簿对于平衡质量和忠诚度至关重要。 2)。为了进一步融合来自输入的低级功能,而不是“污染” VQ代码簿中生成的现实细节,我们提出了一个由纹理解码器和主要解码器组成的并行解码器。然后,这两个解码器与具有变形卷积的纹理翘曲模块进行交互。拟议的VQFR配备了VQ Codebook作为面部细节词典和平行解码器设计,可以在很大程度上提高面部细节的恢复质量,同时保持对先前方法的保真度。
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尽管在许多计算机视觉任务上具有卓越的性能,但深度卷积神经网络众所周知,在具有资源限制的设备上被压缩。大多数现有的网络修剪方法需要艰苦的人类努力和禁止的计算资源,特别是当约束改变时。当需要部署在各种设备上时,这实际上限制了模型压缩的应用。此外,现有的方法仍然受到缺失的理论指导挑战。在本文中,我们提出了一种信息理论启发的自动模型压缩策略。我们的方法背后的原理是信息瓶颈理论,即隐藏的表示应该彼此压缩信息。因此,我们在网络激活中介绍了标准化的Hilbert-Schmidt独立性标准(NHSIC),作为层重要性的稳定和广义指标。当给出某个资源约束时,我们将HSIC指示器与约束将架构搜索问题转换为具有二次约束的线性编程问题。这种问题很容易通过几秒钟的凸优化方法解决。我们还提供严格的证据,揭示优化归一化的HSIC同时最小化不同层之间的相互信息。没有任何搜索过程,我们的方法实现了与最先进的压缩算法相比的更好的压缩权衡。例如,通过Reset-50,我们达到了45.3%的杂志,在想象中有75.75前1个精度。代码是在https://github.com/mac-automl/itpruner/tree/master上的途径。
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伪装的物体检测(COD)旨在将伪装的物体掩盖隐藏在环境中,这是由于伪装对象及其周围环境的类似外观而具有挑战性。生物学研究表明深度可以为伪装对象发现提供有用的对象本地化提示。在本文中,我们研究了伪装对象检测的深度贡献,其中利用现有的单目深度估计(MDE)方法产生深度图。由于MDE数据集和我们的COD数据集之间的域间隙,所生成的深度映射不足以直接使用。然后,我们介绍了两个解决方案,以避免嘈杂的深度地图从主导培训过程中。首先,我们介绍了辅助深度估计分支(“ADE”),旨在重新映射深度图。我们发现我们的“生成深度”情景特别需要“Ade”。其次,我们通过生成的对抗性网络引入多模态的信心感知损失函数,以对伪装对象检测的深度的贡献。我们对各种伪装对象检测数据集的广泛实验说明了现有的“传感器深度”的RGB-D分段技术与“生成深度”工作,我们提出的两个解决方案协同工作,实现了伪装对象检测的有效深度贡献探索。
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虽然网络稀疏作为克服神经网络大小的有希望的方向,但它仍然是保持模型准确性的开放问题,并在一般CPU上实现了显着的加速。在本文中,我们提出了一篇新颖的1美元\ Times N $块稀疏模式(块修剪)的概念来打破这种限制。特别是,具有相同输入通道索引的连续$ N $输出内核被分组为一个块,该块用作我们修剪模式的基本修剪粒度。我们的$ 1 \ times n $ sparsity模式prunes这些块被认为不重要。我们还提供过滤器重新排列的工作流程,首先重新排列输出通道尺寸中的权重矩阵,以获得更具影响力的块,以便精度改进,然后将类似的重新排列到输入通道维度中的下一层权重,以确保正确的卷积操作。此外,可以通过并行化块 - 方向的矢量化操作实现在我们的$ 1 \ Times N $块稀疏之后的输出计算,从而导致总基于CPU的平台上的显着加速。通过对ILSVRC-2012的实验证明了我们修剪模式的功效。例如,在50%的稀疏性和$ n = 4 $的情况下,我们的模式在MobileNet-V2的前1个精度的过滤器修剪中获得了大约3.0%的改进。同时,它在Cortex-A7 CPU上获得56.04ms推断,超过体重修剪。代码可在https://github.com/lmbxmu/1xn处获得。
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Transformer, which originates from machine translation, is particularly powerful at modeling long-range dependencies. Currently, the transformer is making revolutionary progress in various vision tasks, leading to significant performance improvements compared with the convolutional neural network (CNN) based frameworks. In this paper, we conduct extensive research on exploiting the contributions of transformers for accurate and reliable salient object detection. For the former, we apply transformer to a deterministic model, and explain that the effective structure modeling and global context modeling abilities lead to its superior performance compared with the CNN based frameworks. For the latter, we observe that both CNN and transformer based frameworks suffer greatly from the over-confidence issue, where the models tend to generate wrong predictions with high confidence. To estimate the reliability degree of both CNN- and transformer-based frameworks, we further present a latent variable model, namely inferential generative adversarial network (iGAN), based on the generative adversarial network (GAN). The stochastic attribute of the latent variable makes it convenient to estimate the predictive uncertainty, serving as an auxiliary output to evaluate the reliability of model prediction. Different from the conventional GAN, which defines the distribution of the latent variable as fixed standard normal distribution $\mathcal{N}(0,\mathbf{I})$, the proposed iGAN infers the latent variable by gradient-based Markov Chain Monte Carlo (MCMC), namely Langevin dynamics, leading to an input-dependent latent variable model. We apply our proposed iGAN to both fully and weakly supervised salient object detection, and explain that iGAN within the transformer framework leads to both accurate and reliable salient object detection.
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无监督的对光流计算的深度学习取得了令人鼓舞的结果。大多数现有的基于深网的方法都依赖图像亮度一致性和局部平滑度约束来训练网络。他们的性能在发生重复纹理或遮挡的区域降低。在本文中,我们提出了深层的外两极流,这是一种无监督的光流方法,将全局几何约束结合到网络学习中。特别是,我们研究了多种方式在流量估计中强制执行外两极约束。为了减轻在可能存在多个动作的动态场景中遇到的“鸡肉和蛋”类型的问题,我们提出了一个低级别的约束以及对培训的订婚结合的约束。各种基准测试数据集的实验结果表明,与监督方法相比,我们的方法实现了竞争性能,并且优于最先进的无监督深度学习方法。
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Despite deep end-to-end learning methods have shown their superiority in removing non-uniform motion blur, there still exist major challenges with the current multi-scale and scale-recurrent models: 1) Deconvolution/upsampling operations in the coarse-to-fine scheme result in expensive runtime; 2) Simply increasing the model depth with finer-scale levels cannot improve the quality of deblurring. To tackle the above problems, we present a deep hierarchical multi-patch network inspired by Spatial Pyramid Matching to deal with blurry images via a fine-tocoarse hierarchical representation. To deal with the performance saturation w.r.t. depth, we propose a stacked version of our multi-patch model. Our proposed basic multi-patch model achieves the state-of-the-art performance on the Go-Pro dataset while enjoying a 40× faster runtime compared to current multi-scale methods. With 30ms to process an image at 1280×720 resolution, it is the first real-time deep motion deblurring model for 720p images at 30fps. For stacked networks, significant improvements (over 1.2dB) are achieved on the GoPro dataset by increasing the network depth. Moreover, by varying the depth of the stacked model, one can adapt the performance and runtime of the same network for different application scenarios.
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To reproduce the success of text-to-image (T2I) generation, recent works in text-to-video (T2V) generation employ large-scale text-video dataset for fine-tuning. However, such paradigm is computationally expensive. Humans have the amazing ability to learn new visual concepts from just one single exemplar. We hereby study a new T2V generation problem$\unicode{x2014}$One-Shot Video Generation, where only a single text-video pair is presented for training an open-domain T2V generator. Intuitively, we propose to adapt the T2I diffusion model pretrained on massive image data for T2V generation. We make two key observations: 1) T2I models are able to generate images that align well with the verb terms; 2) extending T2I models to generate multiple images concurrently exhibits surprisingly good content consistency. To further learn continuous motion, we propose Tune-A-Video with a tailored Sparse-Causal Attention, which generates videos from text prompts via an efficient one-shot tuning of pretrained T2I diffusion models. Tune-A-Video is capable of producing temporally-coherent videos over various applications such as change of subject or background, attribute editing, style transfer, demonstrating the versatility and effectiveness of our method.
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