Image-text retrieval (ITR) is a challenging task in the field of multimodal information processing due to the semantic gap between different modalities. In recent years, researchers have made great progress in exploring the accurate alignment between image and text. However, existing works mainly focus on the fine-grained alignment between image regions and sentence fragments, which ignores the guiding significance of context background information. Actually, integrating the local fine-grained information and global context background information can provide more semantic clues for retrieval. In this paper, we propose a novel Hierarchical Graph Alignment Network (HGAN) for image-text retrieval. First, to capture the comprehensive multimodal features, we construct the feature graphs for the image and text modality respectively. Then, a multi-granularity shared space is established with a designed Multi-granularity Feature Aggregation and Rearrangement (MFAR) module, which enhances the semantic corresponding relations between the local and global information, and obtains more accurate feature representations for the image and text modalities. Finally, the ultimate image and text features are further refined through three-level similarity functions to achieve the hierarchical alignment. To justify the proposed model, we perform extensive experiments on MS-COCO and Flickr30K datasets. Experimental results show that the proposed HGAN outperforms the state-of-the-art methods on both datasets, which demonstrates the effectiveness and superiority of our model.
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This is a brief technical report of our proposed method for Multiple-Object Tracking (MOT) Challenge in Complex Environments. In this paper, we treat the MOT task as a two-stage task including human detection and trajectory matching. Specifically, we designed an improved human detector and associated most of detection to guarantee the integrity of the motion trajectory. We also propose a location-wise matching matrix to obtain more accurate trace matching. Without any model merging, our method achieves 66.672 HOTA and 93.971 MOTA on the DanceTrack challenge dataset.
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Neural networks are susceptible to data inference attacks such as the membership inference attack, the adversarial model inversion attack and the attribute inference attack, where the attacker could infer useful information such as the membership, the reconstruction or the sensitive attributes of a data sample from the confidence scores predicted by the target classifier. In this paper, we propose a method, namely PURIFIER, to defend against membership inference attacks. It transforms the confidence score vectors predicted by the target classifier and makes purified confidence scores indistinguishable in individual shape, statistical distribution and prediction label between members and non-members. The experimental results show that PURIFIER helps defend membership inference attacks with high effectiveness and efficiency, outperforming previous defense methods, and also incurs negligible utility loss. Besides, our further experiments show that PURIFIER is also effective in defending adversarial model inversion attacks and attribute inference attacks. For example, the inversion error is raised about 4+ times on the Facescrub530 classifier, and the attribute inference accuracy drops significantly when PURIFIER is deployed in our experiment.
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Image super-resolution is a common task on mobile and IoT devices, where one often needs to upscale and enhance low-resolution images and video frames. While numerous solutions have been proposed for this problem in the past, they are usually not compatible with low-power mobile NPUs having many computational and memory constraints. In this Mobile AI challenge, we address this problem and propose the participants to design an efficient quantized image super-resolution solution that can demonstrate a real-time performance on mobile NPUs. The participants were provided with the DIV2K dataset and trained INT8 models to do a high-quality 3X image upscaling. The runtime of all models was evaluated on the Synaptics VS680 Smart Home board with a dedicated edge NPU capable of accelerating quantized neural networks. All proposed solutions are fully compatible with the above NPU, demonstrating an up to 60 FPS rate when reconstructing Full HD resolution images. A detailed description of all models developed in the challenge is provided in this paper.
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在本文中,我们介绍了2022年多模式情感分析挑战(MUSE)的解决方案,其中包括Muse-Humor,Muse-Rection和Muse Surns Sub-Challenges。 2022年穆斯穆斯(Muse 2022)着重于幽默检测,情绪反应和多模式的情感压力,利用不同的方式和数据集。在我们的工作中,提取了不同种类的多模式特征,包括声学,视觉,文本和生物学特征。这些功能由Temma和Gru融合到自发机制框架中。在本文中,1)提取了一些新的音频功能,面部表达功能和段落级文本嵌入以进行准确的改进。 2)我们通过挖掘和融合多模式特征来显着提高多模式情感预测的准确性和可靠性。 3)在模型培训中应用有效的数据增强策略,以减轻样本不平衡问题并防止模型形成学习有偏见的主题字符。对于博物馆的子挑战,我们的模型获得了0.8932的AUC分数。对于Muse Rection子挑战,我们在测试集上的Pearson相关系数为0.3879,它的表现优于所有其他参与者。对于Muse Surst Sub-Challenge,我们的方法在测试数据集上的唤醒和价值都优于基线,达到了0.5151的最终综合结果。
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由于肿瘤的异质性,在个性化的基础上预测抗癌药物的临床结局在癌症治疗中具有挑战性。已经采取了传统的计算努力来建模药物反应对通过其分子概况描绘的单个样品的影响,但由于OMICS数据的高维度而发生过度拟合,因此阻碍了临床应用的模型。最近的研究表明,深度学习是通过学习药物和样品之间的学习对准模式来建立药物反应模型的一种有前途的方法。但是,现有研究采用了简单的特征融合策略,仅考虑了整个药物特征,同时忽略了在对齐药物和基因时可能起着至关重要的作用的亚基信息。特此在本文中,我们提出了TCR(基于变压器的癌症药物反应网络),以预测抗癌药物反应。通过利用注意机制,TCR能够在我们的研究中有效地学习药物原子/子结构和分子特征之间的相互作用。此外,设计了双重损耗函数和交叉抽样策略,以提高TCR的预测能力。我们表明,TCR在所有评估矩阵上(一些具有显着改进)的各种数据分裂策略下优于所有其他方法。广泛的实验表明,TCR在独立的体外实验和体内实际患者数据上显示出显着提高的概括能力。我们的研究强调了TCR的预测能力及其对癌症药物再利用和精度肿瘤治疗的潜在价值。
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在本文中,我们表明样品的欧几里得规范的差异可以在空间翻译和划分归一化之后对语义差异甚至混乱做出贡献。为了解决这个问题,我们提出了一种直观但有效的方法,以均衡样品向量的欧几里得规范。具体来说,我们$ l_2 $ - 在批准之前将每个样品向量归一化,因此样品向量的幅度相同。由于所提出的方法结合了$ L_2 $归一化和批量归一化,因此我们将我们的方法称为$ L_2 $ bn。 $ l_2 $ bn可以增强阶层内特征的紧凑性,并扩大阶层间特征的差异。此外,它可以帮助梯度收敛到稳定的量表。 $ l_2 $ bn易于实现,并且可以在没有任何其他参数和超参数的情况下发挥其效果。因此,它可以用作神经网络的基本归一化方法。我们通过对图像分类和声学场景分类任务进行各种模型的广泛实验来评估$ L_2 $亿美元的有效性。实验结果表明,$ L_2 $ bn能够提高各种神经网络模型的概括能力,并取得了可观的性能改进。
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蛋白质是人类生命的重要组成部分,其结构对于功能和机制分析很重要。最近的工作表明了AI驱动方法对蛋白质结构预测的潜力。但是,新模型的开发受到数据集和基准测试培训程序的限制。据我们所知,现有的开源数据集远不足以满足现代蛋白质序列相关研究的需求。为了解决这个问题,我们介绍了具有高覆盖率和多样性的第一个百万级蛋白质结构预测数据集,称为PSP。该数据集由570K真实结构序列(10TB)和745K互补蒸馏序列(15TB)组成。此外,我们还提供了该数据集上SOTA蛋白结构预测模型的基准测试训练程序。我们通过参与客串比赛验证该数据集的实用程序进行培训,我们的模特赢得了第一名。我们希望我们的PSP数据集以及培训基准能够为AI驱动的蛋白质相关研究提供更广泛的AI/生物学研究人员社区。
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在本文中,我们提出了一个新颖的端到端集团协作学习网络,称为GCONET+,该网络可以有效,有效地(250 fps)识别自然场景中的共呈含量对象。提出的GCONET+基于以下两个基本标准,通过采矿共识表示,实现了共同降低对象检测(COSOD)的新最新性能:1)组内紧凑型,以更好地提高共同空位之间的一致性通过使用我们的新颖组亲和力模块(GAM)捕获其固有共享属性的对象; 2)组间可分离性通过引入我们的新组协作模块(GCM)条件对不一致的共识进行调理,从而有效抑制嘈杂对象对输出的影响。为了进一步提高准确性,我们设计了一系列简单但有效的组件,如下所示:i)在语义级别促进模型学习的经常性辅助分类模块(RACM); ii)一个置信度增强模块(CEM)帮助模型提高最终预测的质量; iii)基于小组的对称三重态(GST)损失指导模型以学习更多的判别特征。对三个具有挑战性的基准测试(即可口可乐,COSOD3K和COSAL2015)进行了广泛的实验,这表明我们的GCONET+优于现有的12个尖端模型。代码已在https://github.com/zhengpeng7/gconet_plus上发布。
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结肠直肠癌(CRC)是世界上最常见的致命癌症之一。果切除术可以有效地中断腺瘤的进展到腺癌,从而降低了CRC发育的风险。结肠镜检查是找到结肠息肉的主要方法。然而,由于息肉的不同尺寸和息肉和周围的粘膜之间的阴影不明确,因此精确地对分段息肉挑战。为了解决这个问题,我们设计了一个用于精确的息肉分割的边界分布引导网络(BDG-Net)。具体地,在理想边界分布图(BDM)的监督下,我们使用边界分布生成模块(BDGM)来聚合高级功能并生成BDM。然后,BDM被发送到边界分布引导解码器(BDGD)作为互补空间信息以引导息肉分割。此外,BDGD采用了多尺度特征交互策略,以提高不同尺寸的息肉的分割精度。广泛的定量和定性评估展示了我们模型的有效性,这在五个公共息肉数据集上显着优于最先进的模型,同时保持低计算复杂性。
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