Recently, density map regression-based methods have dominated in crowd counting owing to their excellent fitting ability on density distribution. However, further improvement tends to saturate mainly because of the confusing background noise and the large density variation. In this paper, we propose a Hierarchically Decoupled Network (HDNet) to solve the above two problems within a unified framework. Specifically, a background classification sub-task is decomposed from the density map prediction task, which is then assigned to a Density Decoupling Module (DDM) to exploit its highly discriminative ability. For the remaining foreground prediction sub-task, it is further hierarchically decomposed to several density-specific sub-tasks by the DDM, which are then solved by the regression-based experts in a Foreground Density Estimation Module (FDEM). Although the proposed strategy effectively reduces the hypothesis space so as to relieve the optimization for those task-specific experts, the high correlation of these sub-tasks are ignored. Therefore, we introduce three types of interaction strategies to unify the whole framework, which are Feature Interaction, Gradient Interaction, and Scale Interaction. Integrated with the above spirits, HDNet achieves state-of-the-art performance on several popular counting benchmarks.

由于无频率，隐私保护和RF信号的广泛覆盖性质，设备自由人的手势识别已得到赞誉。然而，在应用于新域时，从特定域收集的数据训练以识别的神经网络模型受到显着的性能下降。为了解决这一挑战，我们通过有效使用未标记的目标域数据，为设备免费手势识别提出了无监督的域适应框架。具体而言，我们使用伪标签和一致性正则化，并在目标域数据上进行详细设计，以生成伪标签并对齐目标域的实例特征。然后，我们通过随机擦除输入数据来设计两个数据增强方法以增强模型的稳健性。此外，我们应用置信控制约束来解决过度频繁问题。我们对公共WiFi数据集和公共毫米波雷达数据集进行了广泛的实验。实验结果表明了所提出的框架的优越效果。

变更检测（CD）旨在识别在不同时间拍摄的图像对中发生的变化。先前的方法从头开始设计特定的网络，以预测像素级别中的更改口罩，并与一般分割问题斗争。在本文中，我们提出了一种新的范式，该范式将CD降低到语义分割，这意味着调整现有且强大的语义分割网络以求解CD。这种新的范式方便地享受主流语义分割技术，以解决CD中的一般细分问题。因此，我们可以集中精力研究如何检测变化。我们提出了一种新颖而重要的见解，即CD中存在不同的变化类型，应分别学习它们。基于它，我们设计了一个名为MTF的模块来提取更改信息和融合时间功能。 MTF具有高解释性，并揭示了CD的基本特征。并且大多数分割网络都可以通过我们的MTF模块来解决CD问题。最后，我们提出了C-3PO，该网络可检测像素级别的变化。 C-3PO在没有铃铛和哨子的情况下实现最先进的表现。它很简单但有效，可以被视为该领域的新基线。我们的代码将可用。

几次拍摄的语义分割旨在将新颖的类对象分段为仅具有少数标记的支持图像。大多数高级解决方案利用度量学习框架，通过将每个查询功能与学习的类特定的原型匹配来执行分段。然而，由于特征比较不完整，该框架遭受了偏见的分类。为了解决这个问题，我们通过引入类别特定的和类别不可知的原型来提出自适应原型表示，从而构建与查询功能学习语义对齐的完整样本对。互补特征学习方式有效地丰富了特征比较，并有助于在几次拍摄设置中产生一个非偏见的分段模型。它用双分支端到端网络（\即，特定于类分支和类别不可知分支）实现，它生成原型，然后组合查询特征以执行比较。此外，所提出的类别无神不可话的分支简单而且有效。在实践中，它可以自适应地为查询图像生成多种类别 - 不可知的原型，并以自我对比方式学习特征对齐。广泛的Pascal-5 $ ^ i $和Coco-20 $ ^ i $展示了我们方法的优越性。在不牺牲推理效率的费用中，我们的模型实现了最先进的，导致1-Shot和5-Shot Settings进行语义分割。

使用卷积神经网络，面部属性（例如，年龄和吸引力）估算性能得到了大大提高。然而，现有方法在培训目标和评估度量之间存在不一致，因此它们可能是次优。此外，这些方法始终采用具有大量参数的图像分类或面部识别模型，其携带昂贵的计算成本和存储开销。在本文中，我们首先分析了两种最新方法（排名CNN和DLDL）之间的基本关系，并表明排名方法实际上是隐含的学习标签分布。因此，该结果首先将两个现有的最新方法统一到DLDL框架中。其次，为了减轻不一致和降低资源消耗，我们设计了一种轻量级网络架构，并提出了一个统一的框架，可以共同学习面部属性分发和回归属性值。在面部年龄和吸引力估算任务中都证明了我们的方法的有效性。我们的方法使用单一模型实现新的最先进的结果，使用36美元\倍，参数减少3美元，在面部年龄/吸引力估算上的推动速度为3美元。此外，即使参数的数量进一步降低到0.9m（3.8MB磁盘存储），我们的方法也可以实现与最先进的结果。

Masked image modeling (MIM) performs strongly in pre-training large vision Transformers (ViTs). However, small models that are critical for real-world applications cannot or only marginally benefit from this pre-training approach. In this paper, we explore distillation techniques to transfer the success of large MIM-based pre-trained models to smaller ones. We systematically study different options in the distillation framework, including distilling targets, losses, input, network regularization, sequential distillation, etc, revealing that: 1) Distilling token relations is more effective than CLS token- and feature-based distillation; 2) An intermediate layer of the teacher network as target perform better than that using the last layer when the depth of the student mismatches that of the teacher; 3) Weak regularization is preferred; etc. With these findings, we achieve significant fine-tuning accuracy improvements over the scratch MIM pre-training on ImageNet-1K classification, using all the ViT-Tiny, ViT-Small, and ViT-base models, with +4.2%/+2.4%/+1.4% gains, respectively. Our TinyMIM model of base size achieves 52.2 mIoU in AE20K semantic segmentation, which is +4.1 higher than the MAE baseline. Our TinyMIM model of tiny size achieves 79.6% top-1 accuracy on ImageNet-1K image classification, which sets a new record for small vision models of the same size and computation budget. This strong performance suggests an alternative way for developing small vision Transformer models, that is, by exploring better training methods rather than introducing inductive biases into architectures as in most previous works. Code is available at https://github.com/OliverRensu/TinyMIM.

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.

Dataset distillation has emerged as a prominent technique to improve data efficiency when training machine learning models. It encapsulates the knowledge from a large dataset into a smaller synthetic dataset. A model trained on this smaller distilled dataset can attain comparable performance to a model trained on the original training dataset. However, the existing dataset distillation techniques mainly aim at achieving the best trade-off between resource usage efficiency and model utility. The security risks stemming from them have not been explored. This study performs the first backdoor attack against the models trained on the data distilled by dataset distillation models in the image domain. Concretely, we inject triggers into the synthetic data during the distillation procedure rather than during the model training stage, where all previous attacks are performed. We propose two types of backdoor attacks, namely NAIVEATTACK and DOORPING. NAIVEATTACK simply adds triggers to the raw data at the initial distillation phase, while DOORPING iteratively updates the triggers during the entire distillation procedure. We conduct extensive evaluations on multiple datasets, architectures, and dataset distillation techniques. Empirical evaluation shows that NAIVEATTACK achieves decent attack success rate (ASR) scores in some cases, while DOORPING reaches higher ASR scores (close to 1.0) in all cases. Furthermore, we conduct a comprehensive ablation study to analyze the factors that may affect the attack performance. Finally, we evaluate multiple defense mechanisms against our backdoor attacks and show that our attacks can practically circumvent these defense mechanisms.

Blind image quality assessment (BIQA) remains challenging due to the diversity of distortion and image content variation, which complicate the distortion patterns crossing different scales and aggravate the difficulty of the regression problem for BIQA. However, existing BIQA methods often fail to consider multi-scale distortion patterns and image content, and little research has been done on learning strategies to make the regression model produce better performance. In this paper, we propose a simple yet effective Progressive Multi-Task Image Quality Assessment (PMT-IQA) model, which contains a multi-scale feature extraction module (MS) and a progressive multi-task learning module (PMT), to help the model learn complex distortion patterns and better optimize the regression issue to align with the law of human learning process from easy to hard. To verify the effectiveness of the proposed PMT-IQA model, we conduct experiments on four widely used public datasets, and the experimental results indicate that the performance of PMT-IQA is superior to the comparison approaches, and both MS and PMT modules improve the model's performance.

Automatic music generation with artificial intelligence typically requires a large amount of data which is hard to obtain for many less common genres and musical instruments. To tackle this issue, we present ongoing work and preliminary findings on the possibility for deep models to transfer knowledge from language to music, by finetuning large language models pre-trained on a massive text corpus on only hundreds of MIDI files of drum performances. We show that by doing so, one of the largest, state-of-the-art models (GPT3) is capable of generating reasonable drum grooves, while models that are not pre-trained (Transformer) shows no such ability beyond naive repetition. Evaluating generated music is a challenging task, more so is evaluating drum grooves with little precedence in literature. Hence, we propose a tailored structural evaluation method and analyze drum grooves produced by GPT3 compared to those played by human professionals, exposing the strengths and weaknesses of such generation by language-to-music transfer. Our findings suggest that language-to-music transfer learning with large language models is viable and promising.