本文认为共同解决估计3D人体的高度相关任务，并从RGB图像序列预测未来的3D运动。基于Lie代数姿势表示，提出了一种新的自投影机制，自然保留了人类运动运动学。通过基于编码器 - 解码器拓扑的序列到序列的多任务架构进一步促进了这一点，这使我们能够利用两个任务共享的公共场所。最后，提出了一个全球细化模块来提高框架的性能。我们的方法称为PoMomemet的效力是通过消融测试和人文3.6M和Humaneva-I基准的实证评估，从而获得与最先进的竞争性能。

我们的目标是从规定的行动类别中解决从规定的行动类别创造多元化和自然人动作视频的有趣但具有挑战性的问题。关键问题在于能够在视觉外观中综合多种不同的运动序列。在本文中通过两步过程实现，该两步处理维持内部3D姿势和形状表示，Action2Motion和Motion2Video。 Action2Motion随机生成规定的动作类别的合理的3D姿势序列，该类别由Motion2Video进行处理和呈现，以形成2D视频。具体而言，Lie代数理论从事人类运动学的物理法之后代表自然人动作;开发了一种促进输出运动的分集的时间变化自动编码器（VAE）。此外，给定衣服人物的额外输入图像，提出了整个管道以提取他/她的3D详细形状，并在视频中呈现来自不同视图的合理运动。这是通过改进从单个2D图像中提取3D人类形状和纹理，索引，动画和渲染的现有方法来实现这一点，以形成人类运动的2D视频。它还需要3D人类运动数据集的策策和成果进行培训目的。彻底的经验实验，包括消融研究，定性和定量评估表现出我们的方法的适用性，并展示了解决相关任务的竞争力，其中我们的方法的组成部分与最先进的方式比较。

鉴于单个椅子图像，我们可以提取其3D形状并为其合理的关节和动作提供动画吗？这是一个有趣的新问题，可能有许多下游增强现实和虚拟现实应用。在本文中，我们提出了一种自动化方法来解决从单个图像，索引和动画中重建这种三维通用对象的整个过程。与以往的对象操纵的努力相比，我们的工作超出了2D操纵。此外，我们赋予了诸如椅子的其他刚体物体的合理的人类或类似动物的变形;这导致可行的物体运动方面的灵活性更大。凭经验我们的方法在公共数据集以及我们的内部数据集中令人满意地表明了令人满意的表现;与3D重建和骨架预测的相关任务相比，我们的结果通过明显的余量超越了最先进的。我们的实施和数据集将在纸张接受后公开提供。

本文提出了一种新颖的自我监督方法，可以从嘈杂的点云数据重建人类形状和姿势。依靠大量数据集与地面真实的注释，最近基于学习的方法预测点云上的每个顶点的对应关系;倒角距离通常用于最小化变形模板模型和输入点云之间的距离。然而，倒角距离对噪声和异常值非常敏感，因此可以不可靠地分配通信。为了解决这些问题，我们在高斯混合模型下从参数人模型产生的输入点云的概率分布。通过更新给定输入的模板模型的后验概率，我们通过更新模板模型的后视概率来代替明确地对准对应关系，而不是显式对准的对应关系。进一步推导出一种新颖的自我监督损失，这惩罚了变形模板和在后后概率上的输入点云之间的差异。我们的方法非常灵活，适用于完整点云和不完整的云，包括甚至是单个深度图像作为输入。与以前的自我监督方法相比，我们的方法显示了处理大量噪声和异常值的能力。在各种公共合成数据集以及非常嘈杂的真实数据集（即CMU Panoptic）上进行了广泛的实验，证明了我们对最先进的方法的方法的卓越性能。

Conditional Generative Adversarial Networks (GANs) for cross-domain image-to-image translation have made much progress recently [7,8,21,12,4,18]. Depending on the task complexity, thousands to millions of labeled image pairs are needed to train a conditional GAN. However, human labeling is expensive, even impractical, and large quantities of data may not always be available. Inspired by dual learning from natural language translation [23], we develop a novel dual-GAN mechanism, which enables image translators to be trained from two sets of unlabeled images from two domains. In our architecture, the primal GAN learns to translate images from domain U to those in domain V , while the dual GAN learns to invert the task. The closed loop made by the primal and dual tasks allows images from either domain to be translated and then reconstructed. Hence a loss function that accounts for the reconstruction error of images can be used to train the translators. Experiments on multiple image translation tasks with unlabeled data show considerable performance gain of Du-alGAN over a single GAN. For some tasks, DualGAN can even achieve comparable or slightly better results than conditional GAN trained on fully labeled data.

Brain midline shift (MLS) is one of the most critical factors to be considered for clinical diagnosis and treatment decision-making for intracranial hemorrhage. Existing computational methods on MLS quantification not only require intensive labeling in millimeter-level measurement but also suffer from poor performance due to their dependence on specific landmarks or simplified anatomical assumptions. In this paper, we propose a novel semi-supervised framework to accurately measure the scale of MLS from head CT scans. We formulate the MLS measurement task as a deformation estimation problem and solve it using a few MLS slices with sparse labels. Meanwhile, with the help of diffusion models, we are able to use a great number of unlabeled MLS data and 2793 non-MLS cases for representation learning and regularization. The extracted representation reflects how the image is different from a non-MLS image and regularization serves an important role in the sparse-to-dense refinement of the deformation field. Our experiment on a real clinical brain hemorrhage dataset has achieved state-of-the-art performance and can generate interpretable deformation fields.

Current mainstream object detection methods for large aerial images usually divide large images into patches and then exhaustively detect the objects of interest on all patches, no matter whether there exist objects or not. This paradigm, although effective, is inefficient because the detectors have to go through all patches, severely hindering the inference speed. This paper presents an Objectness Activation Network (OAN) to help detectors focus on fewer patches but achieve more efficient inference and more accurate results, enabling a simple and effective solution to object detection in large images. In brief, OAN is a light fully-convolutional network for judging whether each patch contains objects or not, which can be easily integrated into many object detectors and jointly trained with them end-to-end. We extensively evaluate our OAN with five advanced detectors. Using OAN, all five detectors acquire more than 30.0% speed-up on three large-scale aerial image datasets, meanwhile with consistent accuracy improvements. On extremely large Gaofen-2 images (29200$\times$27620 pixels), our OAN improves the detection speed by 70.5%. Moreover, we extend our OAN to driving-scene object detection and 4K video object detection, boosting the detection speed by 112.1% and 75.0%, respectively, without sacrificing the accuracy. Code is available at https://github.com/Ranchosky/OAN.

We study the problem of semantic segmentation calibration. For image classification, lots of existing solutions are proposed to alleviate model miscalibration of confidence. However, to date, confidence calibration research on semantic segmentation is still limited. We provide a systematic study on the calibration of semantic segmentation models and propose a simple yet effective approach. First, we find that model capacity, crop size, multi-scale testing, and prediction correctness have impact on calibration. Among them, prediction correctness, especially misprediction, is more important to miscalibration due to over-confidence. Next, we propose a simple, unifying, and effective approach, namely selective scaling, by separating correct/incorrect prediction for scaling and more focusing on misprediction logit smoothing. Then, we study popular existing calibration methods and compare them with selective scaling on semantic segmentation calibration. We conduct extensive experiments with a variety of benchmarks on both in-domain and domain-shift calibration, and show that selective scaling consistently outperforms other methods.

In this paper, we propose a large-scale language pre-training for text GENeration using dIffusion modEl, which is named GENIE. GENIE is a pre-training sequence-to-sequence text generation model which combines Transformer and diffusion. The diffusion model accepts the latent information from the encoder, which is used to guide the denoising of the current time step. After multiple such denoise iterations, the diffusion model can restore the Gaussian noise to the diverse output text which is controlled by the input text. Moreover, such architecture design also allows us to adopt large scale pre-training on the GENIE. We propose a novel pre-training method named continuous paragraph denoise based on the characteristics of the diffusion model. Extensive experiments on the XSum, CNN/DailyMail, and Gigaword benchmarks shows that GENIE can achieves comparable performance with various strong baselines, especially after pre-training, the generation quality of GENIE is greatly improved. We have also conduct a lot of experiments on the generation diversity and parameter impact of GENIE. The code for GENIE will be made publicly available.

Developing autonomous vehicles (AVs) helps improve the road safety and traffic efficiency of intelligent transportation systems (ITS). Accurately predicting the trajectories of traffic participants is essential to the decision-making and motion planning of AVs in interactive scenarios. Recently, learning-based trajectory predictors have shown state-of-the-art performance in highway or urban areas. However, most existing learning-based models trained with fixed datasets may perform poorly in continuously changing scenarios. Specifically, they may not perform well in learned scenarios after learning the new one. This phenomenon is called "catastrophic forgetting". Few studies investigate trajectory predictions in continuous scenarios, where catastrophic forgetting may happen. To handle this problem, first, a novel continual learning (CL) approach for vehicle trajectory prediction is proposed in this paper. Then, inspired by brain science, a dynamic memory mechanism is developed by utilizing the measurement of traffic divergence between scenarios, which balances the performance and training efficiency of the proposed CL approach. Finally, datasets collected from different locations are used to design continual training and testing methods in experiments. Experimental results show that the proposed approach achieves consistently high prediction accuracy in continuous scenarios without re-training, which mitigates catastrophic forgetting compared to non-CL approaches. The implementation of the proposed approach is publicly available at https://github.com/BIT-Jack/D-GSM