Results 31 to 40 of about 5,519 (162)
The Design and Implementation of Human Activity and Crowd Behavior Analysis System in Video Surveillance [PDF]
, 2016 近年来，视频监控系统广泛应用在人们日常生活的多个领域中，如企业与居家安防、刑侦、银行监控、医院和交通流量监控等。但是，现有的监控系统只是事后取证的手段，缺乏智能化的事件发现和报警。人体行为和人群行为监控是视频监控的核心，智能化行为判定能够为人们提供及时可靠的实时信息，对异常事件做出快速反应。因而，视频监控中人体人群行为分析具有重要的现实意义。本文主要完成视频监控中人体行为和人群行为的分析，主要工作如下： (1)人体行为主要针对于人体运动行为，运动行为获取运用了前景检测和目标跟踪算法 ...
王玉成
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Conservation Biology, Volume 38, Issue 5, October 2024.Abstract Illegal poaching and overexploitation for the international pet trade are among the greatest threats to freshwater turtles in Southeast Asia. Expanding consumer research in China is crucial to filling knowledge gaps about the scale and structure of illegal trade and developing audience‐targeted and relevant interventions that may reduce demand
Wuji Zheng +10 more
wiley +1 more source
野生动物学报, 2021 雉鸡的亚种众多，在其表型与遗传上具有地理变异。雉鸡的一些亚种适应于不同的地理条件（例如：寒带、热带、干旱区、高原）形成了独特的群体形态特征，尤其体现在雄性个体的羽色图案上。羽色图案的复杂性给雉鸡亚种的人工鉴定带来了挑战，为此，本研究探索应用图像识别技术对雉鸡亚种进行识别。对3种识别算法：K近邻分类算法，概率神经网路和符号分类器进行了比较。通过序列前向选择法、序列后向选择法、序列浮动前向选择法和序列浮动后向选择法等算法对差异纹理特征进行提取和比较。本研究对25个雉鸡亚种的高质量博物馆标本的图片进行分析验证。
王彪 王筠 屈军乐
doaj
Trade credit and corporate digital transformation: The role of managerial ability
Financial Review, Volume 59, Issue 3, Page 779-806, August 2024.Abstract We examine whether managerial ability affects the relationship between corporate digital transformation and trade credit. To measure digital transformation, we perform a textual analysis of companies’ annual reports using a customized Chinese dictionary containing digital transformation keywords based on national policy documents and academic ...
Liukai Wang +3 more
wiley +1 more source
Coal gangue image recognition model based on improved U−Net and top coal caving control [PDF]
Coal gangue identification technology is a critical component for the automation of fully mechanized mining faces and represents a significant challenge within this domain.
Libao LI +5 more
core +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 1, Page 36-43, July 2024.ABSTRACT Objective Although remarkable strides have been made in fetal medicine and the prenatal diagnosis of congenital heart disease, around 60% of newborns with isolated coarctation of the aorta (CoA) are not identified prior to birth. The prenatal detection of CoA has been shown to have a notable impact on survival rates of affected infants.
C. A. Taksøe‐Vester +8 more
wiley +1 more source
智能科学与技术学报, 2020 车辆再识别是指给定一张车辆图像，找出其他摄像头拍摄的同一车辆，可将车辆再识别问题看作图像检索的子问题。在真实交通监控系统中，车辆再识别可以起到对目标车辆进行定位、监管、刑侦的作用。随着深度神经网络的兴起和大型数据集的提出，提升车辆再识别的准确度成为近年来计算机视觉和多媒体领域的研究热点。从不同角度对车辆再识别方法进行了分类，并从特征提取、方法设计和性能表现等方面对车辆再识别技术进行了概述、比较和分析，对车辆再识别技术面临的挑战及发展趋势进行了预测。
刘凯, 李浥东, 林伟鹏
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Jianzhu Gangjiegou Jinzhan, 2023 钢结构在现代建筑中有着广泛应用，但钢材的耐腐蚀性较差，锈蚀将降低钢构件的承载力甚至影响结构安全。对钢构件防腐涂层进行定期检测与维护是保证钢结构耐腐蚀性能的主要方法之一。为实现钢构件防腐涂层表面缺陷的自动识别，结合图像处理技术与支持向量机分类算法进行钢构件防腐涂层空鼓、裂纹、剥落3种缺陷的检测。在图像处理阶段，采用自适应中值滤波去除图像噪声，并基于Otsu阈值和改进的Canny算子对增强图像进行分割；在特征提取阶段，提取出包含简单几何特征、不变矩特征、投影特征及纹理特征的65维缺陷图像特征 ...
王亦君, 蒋首超
doaj
Effects of captions on viewers’ perceptions of images depicting human−primate interaction
Conservation Biology, Volume 38, Issue 3, June 2024.Abstract Promoting human contact with wildlife can be harmful to animal conservation and welfare by exposing animals to unsafe situations and driving demand for wildlife tourism and exotic pets. Conservationists and researchers justifiably use social media to raise awareness, but professionals posting pictures of themselves with animals can have ...
Cathryn A. Freund +5 more
wiley +1 more source
基于Mask-RCNN算法的复合绝缘子串红外图像分割与温度读取
Gaoya dianqi, 2021 红外成像可以快速发现复合绝缘子异常温升,从而实现缺陷检测。为了解决复合绝缘子红外检测中人工诊断时间成本高、效率低、背景干扰多的问题,文中提出了基于Mask-RCNN的温升绝缘子自动检测方法。首先使用Mask-RCNN对红外图像数据进行学习训练,进而对其中的绝缘子目标进行识别检测和图像分割。在智能分割之后,通过识别图中的温度范围数据并将绝缘子区域图像灰度与之比对,得到了绝缘子的温度信息,用于绝缘子异常发热故障的诊断。实验研究表明:在对南方某市绝缘子红外测温图像的自动识别中,Mask-RCNN有着优异的表现,
黄新宇 +5 more
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