基于图像的虚拟试验旨在综合一个穿给定服装的人的图像。为了解决任务,现有的方法会经过衣物项目,以适合该人的身体并生成穿着该物品的人的分割图,然后再将物品与人融合。但是,当扭曲和分割生成阶段在没有信息交换的情况下单独运行时,扭曲的衣服和分割图之间的未对准发生了,从而导致最终图像中的工件。信息断开还会导致在身体部位遮住的衣服区域附近过度翘曲,所谓的像素 - 刺式伪像。为了解决这些问题,我们提出了一个新颖的尝试条件发生器,作为两个阶段的统一模块(即扭曲和分割生成阶段)。条件生成器中新提出的特征融合块实现了信息交换,并且条件生成器不会造成任何未对准或像素 - 平方形工件。我们还介绍了歧视者的拒绝,从而滤除了不正确的细分图预测并确保虚拟试验框架的性能。高分辨率数据集上的实验表明,我们的模型成功处理了未对准和遮挡,并显着优于基线。代码可从https://github.com/sangyun884/hr-viton获得。
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发型转移是将源发型修改为目标的任务。尽管最近的发型转移模型可以反映发型的精致特征,但它们仍然有两个主要局限性。首先,当源和目标图像具有不同的姿势(例如,查看方向或面部尺寸)时,现有方法无法转移发型,这在现实世界中很普遍。同样,当源图像中有非平凡的区域被其原始头发遮住时,先前的模型会产生不切实际的图像。当将长发修改为短发时,肩膀或背景被长发遮住了。为了解决这些问题,我们为姿势不变的发型转移,发型提出了一个新颖的框架。我们的模型包括两个阶段:1)基于流动的头发对齐和2)头发合成。在头发对齐阶段,我们利用基于关键点的光流估计器将目标发型与源姿势对齐。然后,我们基于语义区域感知的嵌入面膜(SIM)估计器在头发合成阶段生成最终的发型转移图像。我们的SIM估计器将源图像中的封闭区域划分为不同的语义区域,以反映其在涂料过程中的独特特征。为了证明我们的模型的有效性,我们使用多视图数据集(K-Hairstyle和Voxceleb)进行定量和定性评估。结果表明,发型通过在不同姿势的图像之间成功地转移发型来实现最先进的表现,而这是以前从未实现的。
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基于图像的虚拟试验提供将服装项目转移到给定人的照片上的容量,这通常是通过将物品翘曲到给定的人类姿势并将翘曲的物品调整给人。然而,由于前面的方法的现实综合性图像(例如,SECIES)的结果是不可逼真的,因为颈部导致颈部被误导和对服装风格的重大变化。为了解决这些挑战,我们提出了一种解决这种独特问题的新方法,称为Viton作物。与现有的最先进的虚拟试论模型相比,Viton作物在与随机作物增强集成时更加强大地合成图像。在实验中,我们证明Viton作物优于定性和定量的Viton-HD。
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Many recent works on understanding deep learning try to quantify how much individual data instances influence the optimization and generalization of a model, either by analyzing the behavior of the model during training or by measuring the performance gap of the model when the instance is removed from the dataset. Such approaches reveal characteristics and importance of individual instances, which may provide useful information in diagnosing and improving deep learning. However, most of the existing works on data valuation require actual training of a model, which often demands high-computational cost. In this paper, we provide a training-free data valuation score, called complexity-gap score, which is a data-centric score to quantify the influence of individual instances in generalization of two-layer overparameterized neural networks. The proposed score can quantify irregularity of the instances and measure how much each data instance contributes in the total movement of the network parameters during training. We theoretically analyze and empirically demonstrate the effectiveness of the complexity-gap score in finding 'irregular or mislabeled' data instances, and also provide applications of the score in analyzing datasets and diagnosing training dynamics.
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Data-centric AI has shed light on the significance of data within the machine learning (ML) pipeline. Acknowledging its importance, various research and policies are suggested by academia, industry, and government departments. Although the capability of utilizing existing data is essential, the capability to build a dataset has become more important than ever. In consideration of this trend, we propose a "Data Management Operation and Recipes" that will guide the industry regardless of the task or domain. In other words, this paper presents the concept of DMOps derived from real-world experience. By offering a baseline for building data, we want to help the industry streamline its data operation optimally.
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Generative AI has matured to a point where large-scale models can generate text that seems indistinguishable from human-written text and remarkably photorealistic images. Automatically measuring how close the distribution of generated data is to the target real data distribution is a key step in diagnosing existing models and developing better models. We present MAUVE, a family of comparison measures between pairs of distributions such as those encountered in the generative modeling of text or images. These scores are statistical summaries of divergence frontiers capturing two types of errors in generative modeling. We explore four approaches to statistically estimate these scores: vector quantization, non-parametric estimation, classifier-based estimation, and parametric Gaussian approximations. We provide statistical bounds for the vector quantization approach. Empirically, we find that the proposed scores paired with a range of $f$-divergences and statistical estimation methods can quantify the gaps between the distributions of human-written text and those of modern neural language models by correlating with human judgments and identifying known properties of the generated texts. We conclude the paper by demonstrating its applications to other AI domains and discussing practical recommendations.
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In robotics and computer vision communities, extensive studies have been widely conducted regarding surveillance tasks, including human detection, tracking, and motion recognition with a camera. Additionally, deep learning algorithms are widely utilized in the aforementioned tasks as in other computer vision tasks. Existing public datasets are insufficient to develop learning-based methods that handle various surveillance for outdoor and extreme situations such as harsh weather and low illuminance conditions. Therefore, we introduce a new large-scale outdoor surveillance dataset named eXtremely large-scale Multi-modAl Sensor dataset (X-MAS) containing more than 500,000 image pairs and the first-person view data annotated by well-trained annotators. Moreover, a single pair contains multi-modal data (e.g. an IR image, an RGB image, a thermal image, a depth image, and a LiDAR scan). This is the first large-scale first-person view outdoor multi-modal dataset focusing on surveillance tasks to the best of our knowledge. We present an overview of the proposed dataset with statistics and present methods of exploiting our dataset with deep learning-based algorithms. The latest information on the dataset and our study are available at https://github.com/lge-robot-navi, and the dataset will be available for download through a server.
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Efficient exploration strategy is one of essential issues in cooperative multi-agent reinforcement learning (MARL) algorithms requiring complex coordination. In this study, we introduce a new exploration method with the strangeness that can be easily incorporated into any centralized training and decentralized execution (CTDE)-based MARL algorithms. The strangeness refers to the degree of unfamiliarity of the observations that an agent visits. In order to give the observation strangeness a global perspective, it is also augmented with the the degree of unfamiliarity of the visited entire state. The exploration bonus is obtained from the strangeness and the proposed exploration method is not much affected by stochastic transitions commonly observed in MARL tasks. To prevent a high exploration bonus from making the MARL training insensitive to extrinsic rewards, we also propose a separate action-value function trained by both extrinsic reward and exploration bonus, on which a behavioral policy to generate transitions is designed based. It makes the CTDE-based MARL algorithms more stable when they are used with an exploration method. Through a comparative evaluation in didactic examples and the StarCraft Multi-Agent Challenge, we show that the proposed exploration method achieves significant performance improvement in the CTDE-based MARL algorithms.
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Graph neural networks (GNNs) have received remarkable success in link prediction (GNNLP) tasks. Existing efforts first predefine the subgraph for the whole dataset and then apply GNNs to encode edge representations by leveraging the neighborhood structure induced by the fixed subgraph. The prominence of GNNLP methods significantly relies on the adhoc subgraph. Since node connectivity in real-world graphs is complex, one shared subgraph is limited for all edges. Thus, the choices of subgraphs should be personalized to different edges. However, performing personalized subgraph selection is nontrivial since the potential selection space grows exponentially to the scale of edges. Besides, the inference edges are not available during training in link prediction scenarios, so the selection process needs to be inductive. To bridge the gap, we introduce a Personalized Subgraph Selector (PS2) as a plug-and-play framework to automatically, personally, and inductively identify optimal subgraphs for different edges when performing GNNLP. PS2 is instantiated as a bi-level optimization problem that can be efficiently solved differently. Coupling GNNLP models with PS2, we suggest a brand-new angle towards GNNLP training: by first identifying the optimal subgraphs for edges; and then focusing on training the inference model by using the sampled subgraphs. Comprehensive experiments endorse the effectiveness of our proposed method across various GNNLP backbones (GCN, GraphSage, NGCF, LightGCN, and SEAL) and diverse benchmarks (Planetoid, OGB, and Recommendation datasets). Our code is publicly available at \url{https://github.com/qiaoyu-tan/PS2}
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Recognizing the surrounding environment at low latency is critical in autonomous driving. In real-time environment, surrounding environment changes when processing is over. Current detection models are incapable of dealing with changes in the environment that occur after processing. Streaming perception is proposed to assess the latency and accuracy of real-time video perception. However, additional problems arise in real-world applications due to limited hardware resources, high temperatures, and other factors. In this study, we develop a model that can reflect processing delays in real time and produce the most reasonable results. By incorporating the proposed feature queue and feature select module, the system gains the ability to forecast specific time steps without any additional computational costs. Our method is tested on the Argoverse-HD dataset. It achieves higher performance than the current state-of-the-art methods(2022.10) in various environments when delayed . The code is available at https://github.com/danjos95/DADE
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