共查询到18条相似文献,搜索用时 890 毫秒
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智能交通系统(ITS)是目前世界交通运输领域正在研究和广泛关注的课题。OpenCV是一种用于数字图像处理和计算机视觉的函数库,由Intel公司开发。本文在目标检测方面,对采集到的交通视频进行灰度化、中值滤波、背景建模、二值化,背景差分等处理,可以较准确地检测出运动目标。在目标跟踪方面,提出了CamShift算法和Kalman滤波器相结合的方法,实现视频车辆的精确跟踪。最后,利用OpenCV的运动物体跟踪的数据结构、函数库,建立了一个视频车辆分析系统。用于道路上车辆的检测与跟踪,并具有良好的鲁棒性。 相似文献
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以集成电路后道封装工序中的关键设备全自动砂轮划片机为例,详细阐述了面向IC封装的视觉识别定位系统的硬件结构和软件设计,在全自动砂轮划片机上开发了一套基于OpenCV视觉函数库的图像处理算法,控制划切工作台运动实现对IC工件划切街区的精确定位.在模板匹配方式上,该算法采用比较流行的边缘几何特征匹配方式,并在砂轮划片机的现... 相似文献
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基于视频的车辆运动捕获、识别是计算机视觉领域一个重要的研究课题,通过视频检测的方式作为交通流量调查并用于诱导系统,也是近年来备受研究者关注的前沿方向。本文集中研究基于面向对象的智能交通诱导系统技术方案特别是如何利用面向对象思想将基于硬件的三雏重建技术与车辆二维运动跟踪算法的结合以及通过面向对象的系统构建方式整合原有的诱导系统的实现最终结合实际的试点工程验证并优化本研究方案。本研究的创新点在于,通过面向对象的方法,有效地将硬件上的三维重建分析与中心服务器上的车辆轨迹跟踪算法以及现有的诱导系统通过面向对象的构建方法进行有机结合,大大地提高了系统的灵活性与可扩展性,试点工程证明面向对象的系统构建方案是一个可取的研究方向。OpenCV是用来实现计算机视觉相关技术的开放源码工作库,它包含了三维重建中涉及的一系列关键技术模块,本研究在OpenCV下迅速搭建软硬件平台以开展研究工作。本研究就是在VC++和OpenCV环境下进行了面向对象的系统设计和实现。 相似文献
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本文提出了使用OpenCV(Open Source Computer Vision Library)在Android平台下实现人脸识别的方法。首先,本文介绍了OpenCV2.4的人脸识别算法类FaceRecognizer的使用以及在Windows平台下的实现,接着详细的阐述了利用Android下的JNI(Java Native Interface),并结合Android NDK(Native Development Kit)调用和编译OpenCV下的相关函数,生成共享函数库。经过实验的在Android下人脸识别效果良好。 相似文献
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双目立体视觉的波浪表面重建 总被引:1,自引:0,他引:1
《无线电工程》2019,(8):678-682
针对水面波浪的三维重建问题,提出了结合计算机视觉和光学方面技术的三维重建算法。主要采用双目立体视觉的方法测量浪高,通过采用立体视觉方法计算得出三维坐标,采用最小二乘法将三维坐标拟合为三维曲面;再将平静水面和波浪水面的三维坐标进行对比,生成波浪等高线图。实验结果表明,此算法的三维重建效果较好,并且波浪高度的计算效果与实际波浪高度误差较小。 相似文献
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直线是视觉测量中的主要基元特征.提出了一种新的空间直线的三维重建算法.首先利用LOG算子进行快速像素级定位,再在包含边缘点的邻域内利用空间矩进行亚像素定位法,建立了考虑镜头畸变的双目视觉空间直线重建数学模型,在对边缘点进行去畸变处理的基础上,采用Hough变换与最小二乘相结合的方法获得像面直线,由双目视觉实现了空间直线重建.实验结果显示,在工件与两摄像机相距20 cm左右时,工件测量误差小于0.02 mm,说明该像面直线提取与空间直线重建方法具有较高的精度.Abstract: Beeline is an important element in the computer vision measurement. A new 3-D reconstruction of spatial beeline is proposed. First the LOG operator is used to locate the edge at the level of pixel quickly, and then the spatial moment is used to detect the subpixel location of the discrete points of edge. The least square fitting is adopted to fit the subpixel edge points which have been detected by Hough transform, after having gotten rid of the camera lens distortion. Mathematics model of reconstruction of spatial beeline from image lines on two image planes is set up. The experiments show that the measurement error is less than 0.02 rnm, as the workpiece is away from the two cameras about 20 cram, and 3-D reconstruction arithmetic of spatial beeline has acquired high precision. 相似文献
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在智慧党建项目中,组织部开党员会议、坐班等工作中需要人脸识别或指纹签到,然后将签到的人员头像呈现在H5页面中。从开源的跨平台计算机视觉库OpenCv入手,综合考虑智慧党建的需求,分析OpenCv的识别流程和原理、在党建项目中的应用等。 相似文献
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基于OpenCV的运动目标定位跟踪系统软件设计 总被引:1,自引:0,他引:1
目标定位跟踪技术一直是计算机视觉领域的一个研究热点。为了更好地改进目标跟踪算法的跟踪特性,设计一种基于OpenCV的目标定位跟踪软件系统。通过对Camshift跟踪算法的研究和改进,以实际的跟踪环境为背景,利用VS2008软件平台和OpenCV库函数,设计一种可以控制云台并实时定位跟踪运动目标的软件系统。实验证明,本系统定位跟踪精确,为运动目标的定位跟踪的研究和应用提供了方便,具有一定的实际意义。 相似文献
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Ye Lu J.Z. Zhang Q.M.J. Wu Ze-Nian Li 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》2004,34(4):532-548
The task of recovering three-dimensional (3-D) geometry from two-dimensional views of a scene is called 3-D reconstruction. It is an extremely active research area in computer vision. There is a large body of 3-D reconstruction algorithms available in the literature. These algorithms are often designed to provide different tradeoffs between speed, accuracy, and practicality. In addition, even the output of various algorithms can be quite different. For example, some algorithms only produce a sparse 3-D reconstruction while others are able to output a dense reconstruction. The selection of the appropriate 3-D reconstruction algorithm relies heavily on the intended application as well as the available resources. The goal of this paper is to review some of the commonly used motion-parallax-based 3-D reconstruction techniques and make clear the assumptions under which they are designed. To do so efficiently, we classify the reviewed reconstruction algorithms into two large categories depending on whether a prior calibration of the camera is required. Under each category, related algorithms are further grouped according to the common properties they share. 相似文献
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Structured light vision systems have been successfully used for accurate measurement of 3-D surfaces in computer vision. However, their applications are mainly limited to scanning stationary objects so far since tens of images have to be captured for recovering one 3-D scene. This paper presents an idea for real-time acquisition of 3-D surface data by a specially coded vision system. To achieve 3-D measurement for a dynamic scene, the data acquisition must be performed with only a single image. A principle of uniquely color-encoded pattern projection is proposed to design a color matrix for improving the reconstruction efficiency. The matrix is produced by a special code sequence and a number of state transitions. A color projector is controlled by a computer to generate the desired color patterns in the scene. The unique indexing of the light codes is crucial here for color projection since it is essential that each light grid be uniquely identified by incorporating local neighborhoods so that 3-D reconstruction can be performed with only local analysis of a single image. A scheme is presented to describe such a vision processing method for fast 3-D data acquisition. Practical experimental performance is provided to analyze the efficiency of the proposed methods. 相似文献
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在介绍Intel公司的开源OpenCV计算机视觉库的基础上,研究一种基于OpenCV图像预处理、图像分割技术,运用该技术将河冰图像二值化,实现了冰、水的正确分离,通过统计二值化图像中冰像素数量,实现河冰密度计算。实验结果证明了该方法的有效性、优越性、可行性。 相似文献