This research is dedicated to develop a safety measurement for human-machine cooperative system, in which the machine region and the human region cannot be separated due to the overlap and the movement both from human...This research is dedicated to develop a safety measurement for human-machine cooperative system, in which the machine region and the human region cannot be separated due to the overlap and the movement both from human and from machines. Our proposal here is to automatically monitor the moving objects by image sensing/recognition method, such that the machine system can get enough information about the environment situation and about the production progress at any time, and therefore the machines can accordingly take some corresponding actions automatically to avoid hazard. For this purpose, two types of monitor systems are proposed. The first type is based on the omni directional vision sensor, and the second is based on the stereo vision sensor. Each type may be used alone or together with another type, depending on the safety system's requirements and the specific situation of the manufacture field to be monitored. In this paper, the description about these two types are given, and as for the special application of these image sensors into safety control, the construction of a hierarchy safety system is proposed.展开更多
Building fences to manage the cattle grazing can be very expensive;cost inefficient. These do not provide dynamic control over the area in which the cattle are grazing. Existing virtual fencing techniques for the cont...Building fences to manage the cattle grazing can be very expensive;cost inefficient. These do not provide dynamic control over the area in which the cattle are grazing. Existing virtual fencing techniques for the control of herds of cattle, based on polygon coordinate definition of boundaries is limited in the area of land mass coverage and dynamism. This work seeks to develop a more robust and an improved monocular vision based boundary avoidance for non-invasive stray control system for cattle, with a view to increase land mass coverage in virtual fencing techniques and dynamism. The monocular vision based depth estimation will be modeled using concept of global Fourier Transform (FT) and local Wavelet Transform (WT) of image structure of scenes (boundaries). The magnitude of the global Fourier Transform gives the dominant orientations and textual patterns of the image;while the local Wavelet Transform gives the dominant spectral features of the image and their spatial distribution. Each scene picture or image is defined by features v, which contain the set of global (FT) and local (WT) statistics of the image. Scenes or boundaries distances are given by estimating the depth D by means of the image features v. Sound cues of intensity equivalent to the magnitude of the depth D are applied to the animal ears as stimuli. This brings about the desired control as animals tend to move away from uncomfortable sounds.展开更多
针对煤矿下复杂环境及其安全管理需求,提出一种基于WLAN(Wireless Local Area Network)的全景视觉煤矿安全监控系统,采用ODVS(Omni-Directional Vision Sensors)配合有线和无线通信方式传输图像、信息、指令和数据,实时获取、传输井下...针对煤矿下复杂环境及其安全管理需求,提出一种基于WLAN(Wireless Local Area Network)的全景视觉煤矿安全监控系统,采用ODVS(Omni-Directional Vision Sensors)配合有线和无线通信方式传输图像、信息、指令和数据,实时获取、传输井下实时全景视频图像,利用无线全景摄像机和无线局域网的相关协议绑定矿工身份信息,并利用绑定的信息将矿工定位和跟踪服务整合到煤矿安全监控系统中;该系统能作为监控煤矿环境安全、煤矿生产安全、煤矿机车运输安全和人员安全的一种全新的解决方案,具有十分重要的应用价值和市场前景;测试结果表明设计的ODVS水平方向的成像范围为360°,垂直方向的成像范围为224°,其中仰角为22°、俯角为63°;压缩后的全景图像分辨率为640×480像素和320×240像素(可选),能够很好地实现煤矿安全的监控。展开更多
文摘This research is dedicated to develop a safety measurement for human-machine cooperative system, in which the machine region and the human region cannot be separated due to the overlap and the movement both from human and from machines. Our proposal here is to automatically monitor the moving objects by image sensing/recognition method, such that the machine system can get enough information about the environment situation and about the production progress at any time, and therefore the machines can accordingly take some corresponding actions automatically to avoid hazard. For this purpose, two types of monitor systems are proposed. The first type is based on the omni directional vision sensor, and the second is based on the stereo vision sensor. Each type may be used alone or together with another type, depending on the safety system's requirements and the specific situation of the manufacture field to be monitored. In this paper, the description about these two types are given, and as for the special application of these image sensors into safety control, the construction of a hierarchy safety system is proposed.
文摘Building fences to manage the cattle grazing can be very expensive;cost inefficient. These do not provide dynamic control over the area in which the cattle are grazing. Existing virtual fencing techniques for the control of herds of cattle, based on polygon coordinate definition of boundaries is limited in the area of land mass coverage and dynamism. This work seeks to develop a more robust and an improved monocular vision based boundary avoidance for non-invasive stray control system for cattle, with a view to increase land mass coverage in virtual fencing techniques and dynamism. The monocular vision based depth estimation will be modeled using concept of global Fourier Transform (FT) and local Wavelet Transform (WT) of image structure of scenes (boundaries). The magnitude of the global Fourier Transform gives the dominant orientations and textual patterns of the image;while the local Wavelet Transform gives the dominant spectral features of the image and their spatial distribution. Each scene picture or image is defined by features v, which contain the set of global (FT) and local (WT) statistics of the image. Scenes or boundaries distances are given by estimating the depth D by means of the image features v. Sound cues of intensity equivalent to the magnitude of the depth D are applied to the animal ears as stimuli. This brings about the desired control as animals tend to move away from uncomfortable sounds.
基金Guangzhou Science and Technology Program(1563000115)
文摘智能视觉传感器技术因其低成本和图像高效采集优势成为当今无线视觉传感器网络(wireless vision sensor network,WVSN)的研究热点。该文在之前基于ARM平台S3C6410设计的低成本高分辨率农业视觉传感器(agricultural high resolution vision sensor,HRAVS)设计基础上,进行了网络和远程控制扩展,设计了一种基于WCDMA和Wi-Fi的高分辨率视觉传感器远程传输控制方案(vision sensor remote transmission control schema for the HRAVS,VSRTC)。使新型HRAVS节点可以利用有线、Wi-Fi、3G和4G等支持WVSN和农业物联网的应用。该文详细设计了VSRTC的应用体系结构、传输控制协议、应用软件。利用扩展的网络化视觉感知传感器,在华南农业农业大学试验农场部署了10个图像采集节点构成的WVSN,并开展了25d的运行测试,测试了新型节点的稳定性、图像采集与编码的性能,采集图像的平均耗时,以及在不同分辨率下的视频帧速率等。结果表明,该节点能够有效地支持命令响应式、周期响应式、视频流3种采集模式;在重传方案支持下所有节点指令丢失率在1%以内;在非联网状态下节点本地工作模式下,节点在1.3、2.0和3.2 Mpixel下采集图像的最短节点平均耗时分别约为6.2、8.2和11.1 s,最大视频帧速率分别为58.7、34.6、16.4帧/s;在全网络环境中,节点在1.3、2.0和3.2 Mpixel下采集图像的最短节点平均耗时分别约为17.6、26.9和49.6 s,最大视频帧速率分别为20.2、16.1、9.3帧/s。该方案对实时性要求不太高的农业领域来说,基本能满足其高分辨率图像和视频传输的需要。
文摘针对煤矿下复杂环境及其安全管理需求,提出一种基于WLAN(Wireless Local Area Network)的全景视觉煤矿安全监控系统,采用ODVS(Omni-Directional Vision Sensors)配合有线和无线通信方式传输图像、信息、指令和数据,实时获取、传输井下实时全景视频图像,利用无线全景摄像机和无线局域网的相关协议绑定矿工身份信息,并利用绑定的信息将矿工定位和跟踪服务整合到煤矿安全监控系统中;该系统能作为监控煤矿环境安全、煤矿生产安全、煤矿机车运输安全和人员安全的一种全新的解决方案,具有十分重要的应用价值和市场前景;测试结果表明设计的ODVS水平方向的成像范围为360°,垂直方向的成像范围为224°,其中仰角为22°、俯角为63°;压缩后的全景图像分辨率为640×480像素和320×240像素(可选),能够很好地实现煤矿安全的监控。
