与传统方法相比,学到的图像压缩已在PSNR和MS-SSIM中取得了非凡的速率延伸性能。但是,它遭受了密集的计算,这对于现实世界的应用是无法忍受的,目前导致其工业应用有限。在本文中,我们将神经体系结构搜索(NAS)介绍到具有较低延迟的更有效网络,并利用量化以加速推理过程。同时,已经为提高效率而做出了工程努力。使用PSNR和MS-SSIM的混合损失以更好的视觉质量进行了优化,我们获得的MSSIM比JPEG,JPEG XL和AVIF在所有比特率上都高得多,而JPEG XL和AVIF之间的PSNR则获得了PSNR。与JPEG-Turbo相比,我们的LIC的软件实施实现了可比较甚至更快的推理速度,而多次比JPEG XL和AVIF快。此外,我们的LIC实施达到了145 fps的惊人吞吐量,用于编码为208 fps,用于在Tesla T4 GPU上解码1080p图像。在CPU上,我们实施的延迟与JPEG XL相当。
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Geometric rectification of images of distorted documents finds wide applications in document digitization and Optical Character Recognition (OCR). Although smoothly curved deformations have been widely investigated by many works, the most challenging distortions, e.g. complex creases and large foldings, have not been studied in particular. The performance of existing approaches, when applied to largely creased or folded documents, is far from satisfying, leaving substantial room for improvement. To tackle this task, knowledge about document rectification should be incorporated into the computation, among which the developability of 3D document models and particular textural features in the images, such as straight lines, are the most essential ones. For this purpose, we propose a general framework of document image rectification in which a computational isometric mapping model is utilized for expressing a 3D document model and its flattening in the plane. Based on this framework, both model developability and textural features are considered in the computation. The experiments and comparisons to the state-of-the-art approaches demonstrated the effectiveness and outstanding performance of the proposed method. Our method is also flexible in that the rectification results can be enhanced by any other methods that extract high-quality feature lines in the images.
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机器学习和非接触传感器的进步使您能够在医疗保健环境中理解复杂的人类行为。特别是,已经引入了几种深度学习系统,以实现对自闭症谱系障碍(ASD)等神经发展状况的全面分析。这种情况会影响儿童的早期发育阶段,并且诊断完全依赖于观察孩子的行为和检测行为提示。但是,诊断过程是耗时的,因为它需要长期的行为观察以及专家的稀缺性。我们展示了基于区域的计算机视觉系统的效果,以帮助临床医生和父母分析孩子的行为。为此,我们采用并增强了一个数据集,用于使用在不受控制的环境中捕获的儿童的视频来分析自闭症相关的动作(例如,在各种环境中使用消费级摄像机收集的视频)。通过检测视频中的目标儿童以减少背景噪声的影响,可以预处理数据。在时间卷积模型的有效性的推动下,我们提出了能够从视频帧中提取动作功能并通过分析视频中的框架之间的关系来从视频帧中提取动作功能并分类与自闭症相关的行为。通过对功能提取和学习策略的广泛评估,我们证明了通过膨胀的3D Convnet和多阶段的时间卷积网络实现最佳性能,达到了0.83加权的F1得分,以分类三种自闭症相关的动作,超越表现优于表现现有方法。我们还通过在同一系统中采用ESNET主链来提出一个轻重量解决方案,实现0.71加权F1得分的竞争结果,并在嵌入式系统上实现潜在的部署。
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合成伪样品当前是解决广义零局学习(GZSL)问题的最有效方法。大多数模型都达到了竞争性能,但仍然遇到两个问题:(1)功能令人困惑,整体表示混淆了与任务相关和与任务无关的功能,并且现有模型以生成的方式将它们分解,但是它们是不合理的,无法合成可靠的可靠伪样品样本样品有限; (2)分布不确定性,当现有模型合成不确定分布的样本时,需要大量数据,这在有限的可见类样品中导致性能差。在本文中,我们提出了一个非生成模型,以在两个模块中相应地解决这些问题:(1)与任务相关的功能分离,将任务相关的功能从任务无关的功能中排除,通过对域的对抗性学习域对合理合成的适应性; (2)可控的伪样品合成,以合成具有某些特征的边缘伪钉和中心假样品,以产生更多的多样性和直观的传递。此外,为了描述在培训过程中看到的限制类样本的新场景,我们进一步制定了一个新的ZSL任务,名为“几乎看不见的类别和零射门的唯一类别学习”(FSZU)(FSZU)。对四个基准测试的广泛实验验证了所提出的方法在GZSL和FSZU任务中具有竞争力。
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多模式机器翻译(MMT)通过引入视觉信息来提高翻译质量。但是,现有的MMT模型忽略了图像将带来与文本无关的信息的问题,从而引起了大量噪音并影响翻译质量。本文提出了一种用于多模式机器翻译的新型Gumbel注意事项,它选择了图像特征的文本相关部分。具体而言,与以前的基于注意的方法不同,我们首先使用可区分的方法选择图像信息并自动删除图像功能的无用部分。实验证明我们的方法保留了与文本相关的图像特征,其余部分帮助MMT模型生成更好的翻译。
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In this paper, we propose a robust 3D detector, named Cross Modal Transformer (CMT), for end-to-end 3D multi-modal detection. Without explicit view transformation, CMT takes the image and point clouds tokens as inputs and directly outputs accurate 3D bounding boxes. The spatial alignment of multi-modal tokens is performed implicitly, by encoding the 3D points into multi-modal features. The core design of CMT is quite simple while its performance is impressive. CMT obtains 73.0% NDS on nuScenes benchmark. Moreover, CMT has a strong robustness even if the LiDAR is missing. Code will be released at https://github.com/junjie18/CMT.
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Knowledge graphs (KG) have served as the key component of various natural language processing applications. Commonsense knowledge graphs (CKG) are a special type of KG, where entities and relations are composed of free-form text. However, previous works in KG completion and CKG completion suffer from long-tail relations and newly-added relations which do not have many know triples for training. In light of this, few-shot KG completion (FKGC), which requires the strengths of graph representation learning and few-shot learning, has been proposed to challenge the problem of limited annotated data. In this paper, we comprehensively survey previous attempts on such tasks in the form of a series of methods and applications. Specifically, we first introduce FKGC challenges, commonly used KGs, and CKGs. Then we systematically categorize and summarize existing works in terms of the type of KGs and the methods. Finally, we present applications of FKGC models on prediction tasks in different areas and share our thoughts on future research directions of FKGC.
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Few Shot Instance Segmentation (FSIS) requires models to detect and segment novel classes with limited several support examples. In this work, we explore a simple yet unified solution for FSIS as well as its incremental variants, and introduce a new framework named Reference Twice (RefT) to fully explore the relationship between support/query features based on a Transformer-like framework. Our key insights are two folds: Firstly, with the aid of support masks, we can generate dynamic class centers more appropriately to re-weight query features. Secondly, we find that support object queries have already encoded key factors after base training. In this way, the query features can be enhanced twice from two aspects, i.e., feature-level and instance-level. In particular, we firstly design a mask-based dynamic weighting module to enhance support features and then propose to link object queries for better calibration via cross-attention. After the above steps, the novel classes can be improved significantly over our strong baseline. Additionally, our new framework can be easily extended to incremental FSIS with minor modification. When benchmarking results on the COCO dataset for FSIS, gFSIS, and iFSIS settings, our method achieves a competitive performance compared to existing approaches across different shots, e.g., we boost nAP by noticeable +8.2/+9.4 over the current state-of-the-art FSIS method for 10/30-shot. We further demonstrate the superiority of our approach on Few Shot Object Detection. Code and model will be available.
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Graph Neural Networks (GNNs) have shown satisfying performance on various graph learning tasks. To achieve better fitting capability, most GNNs are with a large number of parameters, which makes these GNNs computationally expensive. Therefore, it is difficult to deploy them onto edge devices with scarce computational resources, e.g., mobile phones and wearable smart devices. Knowledge Distillation (KD) is a common solution to compress GNNs, where a light-weighted model (i.e., the student model) is encouraged to mimic the behavior of a computationally expensive GNN (i.e., the teacher GNN model). Nevertheless, most existing GNN-based KD methods lack fairness consideration. As a consequence, the student model usually inherits and even exaggerates the bias from the teacher GNN. To handle such a problem, we take initial steps towards fair knowledge distillation for GNNs. Specifically, we first formulate a novel problem of fair knowledge distillation for GNN-based teacher-student frameworks. Then we propose a principled framework named RELIANT to mitigate the bias exhibited by the student model. Notably, the design of RELIANT is decoupled from any specific teacher and student model structures, and thus can be easily adapted to various GNN-based KD frameworks. We perform extensive experiments on multiple real-world datasets, which corroborates that RELIANT achieves less biased GNN knowledge distillation while maintaining high prediction utility.
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This paper focuses on designing efficient models with low parameters and FLOPs for dense predictions. Even though CNN-based lightweight methods have achieved stunning results after years of research, trading-off model accuracy and constrained resources still need further improvements. This work rethinks the essential unity of efficient Inverted Residual Block in MobileNetv2 and effective Transformer in ViT, inductively abstracting a general concept of Meta-Mobile Block, and we argue that the specific instantiation is very important to model performance though sharing the same framework. Motivated by this phenomenon, we deduce a simple yet efficient modern \textbf{I}nverted \textbf{R}esidual \textbf{M}obile \textbf{B}lock (iRMB) for mobile applications, which absorbs CNN-like efficiency to model short-distance dependency and Transformer-like dynamic modeling capability to learn long-distance interactions. Furthermore, we design a ResNet-like 4-phase \textbf{E}fficient \textbf{MO}del (EMO) based only on a series of iRMBs for dense applications. Massive experiments on ImageNet-1K, COCO2017, and ADE20K benchmarks demonstrate the superiority of our EMO over state-of-the-art methods, \eg, our EMO-1M/2M/5M achieve 71.5, 75.1, and 78.4 Top-1 that surpass \textbf{SoTA} CNN-/Transformer-based models, while trading-off the model accuracy and efficiency well.
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