很少有图像生成和几张相关的图像翻译是两个相关的任务，这两个任务旨在为只有几张图像的看不见类别生成新图像。在这项工作中，我们首次尝试将几张图像翻译方法调整为几乎没有图像生成任务。几乎没有图像翻译将图像分解为样式向量和内容图。看不见的样式矢量可以与不同的见面内容映射结合使用，以产生不同的图像。但是，它需要存储可见的图像以提供内容图，并且看不见的样式向量可能与可见的内容映射不相容。为了使其适应少量图像生成任务，我们通过将连续内容映射量化为离散的内容映射而不是存储可见图像，从而学习了局部内容向量的紧凑词字典。此外，我们对根据样式向量进行的离散内容图的自回归分布进行建模，这可以减轻内容映射和样式向量之间的不兼容。三个真实数据集的定性和定量结果表明，与以前的方法相比，我们的模型可以为看不见的类别产生更高的多样性和忠诚度图像。

学习为仅基于几个图像（称为少数图像生成的少数图像）生成新类别的新图像，引起了研究的兴趣。几项最先进的作品取得了令人印象深刻的结果，但多样性仍然有限。在这项工作中，我们提出了一个新型的三角洲生成对抗网络（Deltagan），该网络由重建子网和一代子网组成。重建子网捕获了类别内转换，即同一类别对之间的三角洲。该生成子网为输入图像生成了特定于样本的三角洲，该图像与此输入图像结合使用，以在同一类别中生成新图像。此外，对抗性的三角洲匹配损失旨在将上述两个子网链接在一起。六个基准数据集的广泛实验证明了我们提出的方法的有效性。我们的代码可从https://github.com/bcmi/deltagan-few-shot-image-generation获得。

图像构成目标在将前景对象插入到背景图像中。最先前的图像构成方法专注于调整前景，使其与背景兼容，同时忽略背景的前景的阴影效果。在这项工作中，我们专注于为复合图像中的前景对象产生合理的阴影。首先，我们通过基于配对的真实图像和deshadowed图像生成合成合成图像来贡献实际阴影生成数据集脱差。然后，我们提出了一种新的阴影生成网络SGRNet，其包括阴影掩模预测阶段和阴影填充阶段。在阴影掩模预测阶段，前景和背景信息彻底互动以产生前景影掩模。在阴影填充阶段，预计暗影参数填充阴影区域。我们的Desoba数据集和真实复合图像的广泛实验证明了我们所提出的方法的有效性。我们的数据集和代码可在https://github.com/bcmi/object-shadow-generation-dataset-desoba获得。

学习为仅基于几个图像（称为少数图像生成的少数图像）生成新类别的新图像，引起了研究的兴趣。几项最先进的作品取得了令人印象深刻的结果，但多样性仍然有限。在这项工作中，我们提出了一个新型的三角洲生成对抗网络（Deltagan），该网络由重建子网和一代子网组成。重建子网捕获了类别内转换，即“ delta”，在相同类别对之间。生成子网为输入图像生成了特定于样本的“ delta”，该图像与此输入图像结合使用，以在同一类别中生成新图像。此外，对抗性的三角洲匹配损失旨在将上述两个子网链接在一起。在五个少量图像数据集上进行的广泛实验证明了我们提出的方法的有效性。

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.

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.