最近的成功表明,可以通过文本提示来操纵图像,例如,在雨天的晴天,在雨天中被操纵到同一场景中,这是由文本输入“下雨”驱动的雨天。这些方法经常利用基于样式的图像生成器,该生成器利用多模式(文本和图像)嵌入空间。但是,我们观察到,这种文本输入通常在提供和综合丰富的语义提示时被瓶颈瓶颈,例如将大雨与雨雨区分开。为了解决这个问题,我们主张利用另一种方式,声音,在图像操纵中具有显着优势,因为它可以传达出比文本更多样化的语义提示(生动的情感或自然世界的动态表达)。在本文中,我们提出了一种新颖的方法,该方法首先使用声音扩展了图像文本接头嵌入空间,并应用了一种直接的潜在优化方法来根据音频输入(例如雨的声音)操纵给定的图像。我们的广泛实验表明,我们的声音引导的图像操纵方法在语义和视觉上比最先进的文本和声音引导的图像操纵方法产生更合理的操作结果,这通过我们的人类评估进一步证实。我们的下游任务评估还表明,我们学到的图像文本单嵌入空间有效地编码声音输入。
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在多视图3D对象检测任务中,重叠图像区域的差异监督显着改善了整体检测性能。但是,当前的多视图3D对象检测方法通常无法正确检测重叠区域中的对象,并且网络对场景的理解通常仅限于单眼检测网络。为了减轻此问题,我们主张应用传统的立体声差异估计方法,以获取重叠区域的可靠差异信息。鉴于差异估计为监督,我们建议将网络正规化以充分利用双眼图像的几何潜力,并提高整体检测准确性。此外,我们建议使用对抗重叠区域的歧视器,该区域的训练以最大程度地减少非重叠区域和重叠区域之间的代表性差距,在这些区域中通常会因摄像机失真而在很大程度上被遮挡或因变形而遭受变形,从而导致域移动,从而导致域移动。我们用大规模的多视图3D对象检测基准(称为Nuscenes)证明了所提出的方法的有效性。我们的实验表明,我们提出的方法的表现优于当前最新方法。
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Stylegan最近的成功表明,预训练的Stylegan潜在空间对现实的视频生成很有用。但是,由于难以确定stylegan潜在空间的方向和幅度,因此视频中产生的运动通常在语义上没有意义。在本文中,我们提出了一个框架来通过利用多模式(声音图像文本)嵌入空间来生成现实视频。由于声音提供了场景的时间上下文,因此我们的框架学会了生成与声音一致的视频。首先,我们的声音反演模块将音频直接映射到Stylegan潜在空间中。然后,我们结合了基于夹子的多模式嵌入空间,以进一步提供视听关系。最后,提出的帧发电机学会在潜在空间中找到轨迹,该空间与相应的声音相干,并以层次结构方式生成视频。我们为声音引导的视频生成任务提供新的高分辨率景观视频数据集(视听对)。实验表明,我们的模型在视频质量方面优于最新方法。我们进一步显示了几种应用程序,包括图像和视频编辑,以验证我们方法的有效性。
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最近的生成模型的成功表明,利用多模态嵌入空间可以使用文本信息操纵图像。然而,由于源的动态特性,使用其他来源而不是声音的文本来操纵图像,而不是声音,并不容易。特别是,声音可以传达真实世界的生动情感和动态表达。在这里,我们提出了一个框架,该框架将声音直接编码为多模态(图像文本)嵌入空间,并从空间操纵图像。我们的音频编码器受过培训以产生来自音频输入的潜在表示,该音频输入被强制与多模式嵌入空间中的图像和文本表示对齐。我们使用基于对齐的嵌入式的直接潜在优化方法进行声音引导图像操纵。我们还表明,我们的方法可以混合文本和音频模态,这丰富了各种图像修改。我们验证了定量和定性的声音引导图像操纵的有效性。我们还表明,我们的方法可以混合不同的模态,即文本和音频,这丰富了图像修改的各种。零射频分类和语义级图像分类的实验表明,我们所提出的模型优于其他文本和声音引导最先进的方法。
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The 3D-aware image synthesis focuses on conserving spatial consistency besides generating high-resolution images with fine details. Recently, Neural Radiance Field (NeRF) has been introduced for synthesizing novel views with low computational cost and superior performance. While several works investigate a generative NeRF and show remarkable achievement, they cannot handle conditional and continuous feature manipulation in the generation procedure. In this work, we introduce a novel model, called Class-Continuous Conditional Generative NeRF ($\text{C}^{3}$G-NeRF), which can synthesize conditionally manipulated photorealistic 3D-consistent images by projecting conditional features to the generator and the discriminator. The proposed $\text{C}^{3}$G-NeRF is evaluated with three image datasets, AFHQ, CelebA, and Cars. As a result, our model shows strong 3D-consistency with fine details and smooth interpolation in conditional feature manipulation. For instance, $\text{C}^{3}$G-NeRF exhibits a Fr\'echet Inception Distance (FID) of 7.64 in 3D-aware face image synthesis with a $\text{128}^{2}$ resolution. Additionally, we provide FIDs of generated 3D-aware images of each class of the datasets as it is possible to synthesize class-conditional images with $\text{C}^{3}$G-NeRF.
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In both terrestrial and marine ecology, physical tagging is a frequently used method to study population dynamics and behavior. However, such tagging techniques are increasingly being replaced by individual re-identification using image analysis. This paper introduces a contrastive learning-based model for identifying individuals. The model uses the first parts of the Inception v3 network, supported by a projection head, and we use contrastive learning to find similar or dissimilar image pairs from a collection of uniform photographs. We apply this technique for corkwing wrasse, Symphodus melops, an ecologically and commercially important fish species. Photos are taken during repeated catches of the same individuals from a wild population, where the intervals between individual sightings might range from a few days to several years. Our model achieves a one-shot accuracy of 0.35, a 5-shot accuracy of 0.56, and a 100-shot accuracy of 0.88, on our dataset.
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Feature selection helps reduce data acquisition costs in ML, but the standard approach is to train models with static feature subsets. Here, we consider the dynamic feature selection (DFS) problem where a model sequentially queries features based on the presently available information. DFS is often addressed with reinforcement learning (RL), but we explore a simpler approach of greedily selecting features based on their conditional mutual information. This method is theoretically appealing but requires oracle access to the data distribution, so we develop a learning approach based on amortized optimization. The proposed method is shown to recover the greedy policy when trained to optimality and outperforms numerous existing feature selection methods in our experiments, thus validating it as a simple but powerful approach for this problem.
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The purpose of this work was to tackle practical issues which arise when using a tendon-driven robotic manipulator with a long, passive, flexible proximal section in medical applications. A separable robot which overcomes difficulties in actuation and sterilization is introduced, in which the body containing the electronics is reusable and the remainder is disposable. A control input which resolves the redundancy in the kinematics and a physical interpretation of this redundancy are provided. The effect of a static change in the proximal section angle on bending angle error was explored under four testing conditions for a sinusoidal input. Bending angle error increased for increasing proximal section angle for all testing conditions with an average error reduction of 41.48% for retension, 4.28% for hysteresis, and 52.35% for re-tension + hysteresis compensation relative to the baseline case. Two major sources of error in tracking the bending angle were identified: time delay from hysteresis and DC offset from the proximal section angle. Examination of these error sources revealed that the simple hysteresis compensation was most effective for removing time delay and re-tension compensation for removing DC offset, which was the primary source of increasing error. The re-tension compensation was also tested for dynamic changes in the proximal section and reduced error in the final configuration of the tip by 89.14% relative to the baseline case.
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According to the rapid development of drone technologies, drones are widely used in many applications including military domains. In this paper, a novel situation-aware DRL- based autonomous nonlinear drone mobility control algorithm in cyber-physical loitering munition applications. On the battlefield, the design of DRL-based autonomous control algorithm is not straightforward because real-world data gathering is generally not available. Therefore, the approach in this paper is that cyber-physical virtual environment is constructed with Unity environment. Based on the virtual cyber-physical battlefield scenarios, a DRL-based automated nonlinear drone mobility control algorithm can be designed, evaluated, and visualized. Moreover, many obstacles exist which is harmful for linear trajectory control in real-world battlefield scenarios. Thus, our proposed autonomous nonlinear drone mobility control algorithm utilizes situation-aware components those are implemented with a Raycast function in Unity virtual scenarios. Based on the gathered situation-aware information, the drone can autonomously and nonlinearly adjust its trajectory during flight. Therefore, this approach is obviously beneficial for avoiding obstacles in obstacle-deployed battlefields. Our visualization-based performance evaluation shows that the proposed algorithm is superior from the other linear mobility control algorithms.
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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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