Covid-19大流行导致了前所未有的全球公共卫生危机。鉴于其固有的性质,建议社会疏散措施作为遏制这种大流行传播的主要策略。因此,识别违反这些协议的情况,对削减疾病的传播并促进可持续生活方式具有影响。本文提出了一种基于电脑视觉的基于计算机视觉的系统,分析了CCTV镜头,为Covid-19传播提供了威胁水平评估。该系统努力捕获跨越多个帧的CCTV镜头的信息内容,以识别各个帧的各种违反社会偏移协议的实例,以及跨空间的识别,以及组行为的识别。该功能主要是通过利用基于时间图的基础结构来实现CCTV镜头的信息和对全能解释图的策略并量化给定场景的威胁级别的策略。在一系列场景中测试并验证各个组件,并针对人类专家意见进行了完整的系统。结果反映了威胁水平对人,其物理接近,相互作用,防护服和群体动力学的依赖。系统性能的准确性为76%,从而在城市进行了可部署的威胁监控系统,以允许社会中的正常和可持续性。
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内在图像分解是生成图像的成分的打开问题。从单个图像产生反射率和阴影是一个具体的任务,特别是当没有地面真相时。缺乏无监督的学习方法,用于使用单个图像将图像分解成反射率和阴影。我们提出了一种神经网络架构,其能够使用从图像导出的基于物理的参数进行这种分解。通过实验结果,我们展示了(a)所提出的方法优于现有的基于深度学习的IID技术和(b)衍生参数显着提高疗效。我们得出结论,对结果(数值和示例图像)的仔细分析,显示了几个途径以改进。
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Agricultural image recognition tasks are becoming increasingly dependent on deep learning (DL); however, despite the excellent performance of DL, it is difficult to comprehend the type of logic or features of the input image it uses during decision making. Knowing the logic or features is highly crucial for result verification, algorithm improvement, training data improvement, and knowledge extraction. However, the explanations from the current heatmap-based algorithms are insufficient for the abovementioned requirements. To address this, this paper details the development of a classification and explanation method based on a variational autoencoder (VAE) architecture, which can visualize the variations of the most important features by visualizing the generated images that correspond to the variations of those features. Using the PlantVillage dataset, an acceptable level of explainability was achieved without sacrificing the classification accuracy. The proposed method can also be extended to other crops as well as other image classification tasks. Further, application systems using this method for disease identification tasks, such as the identification of potato blackleg disease, potato virus Y, and other image classification tasks, are currently being developed.
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