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基于机器视觉的种子品种实时检测系统研究 总被引:12,自引:0,他引:12
机器视觉技术的快速低成本实时检测杂交水稻种子品种新系统包括一组可以自动上料、光照箱、图像采集卡、CCD摄像头和自动下料等硬件以及图像处理及品种识别软件组成.系统的实现过程为:通过上料斗自动装入种子,种子由单片机控制的输送装置进入光照箱,每隔2秒停止一次,CCD摄像头采集图像,图像被读入内存,通过软件系统处理种子的图像,并提取品种的特征参数.通过此系统识别100粒种子的时间为5秒,品种的识别率分别达到了:先农5号为99.99%,金优桂为99.93%,优166为 98.89%,先农3号为78.82%,中优463 为86.65%. 相似文献
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视频图像实时小波变换系统由CCD摄像头、视频图像采集卡和计算机软件组成.利用数值方法对视频图像进行小波变换,并实时显示变换结果。实验表明该系统对视频图像的实时小波变换具有较高质量和效率,利用Haar小波变换,图像边缘得到明显增强。 相似文献
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为提高自动光学检测系统(AOI)的缺陷检出率,研究了一种采用多色光源照明,利用机器视觉获取被测高密度印刷电路板(HDI型PCB)图像,通过图像处理快速准确地识别出各种缺陷的新型AOI。实验装置由主控计算机、电气控制系统、精密机械运动装置、多色光源照明和图像采集系统等组成。图像处理及识别软件基于OPENCV和VisualStudio2005开发,模块化设计,包括光源控制、图像采集、图像拼接、图像定位、路径规划、缺陷检测和缺陷统计等模块。实验结果表明,新型AOI系统可检出加载HDI型PCB的各种缺陷,缺陷的检出率可达99.9%,误报率只有0.3%。 相似文献
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介绍了苹果颜色自动分级系统的硬件组成 ,确定了苹果颜色特征的提取方法 ,利用遗传算法实现了多层前向神经网络识别器的学习设计 ,实现了苹果颜色的实时分级 ,并通过实验验证了方法的有效性 .试验结果表明 ,颜色分级识别准确率在 90 %以上 ,分级一个苹果所用的时间为 15 0 ms 相似文献
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在计算机技术高速发展的时代,多平台计算机视觉库随之产生。OpenCV作为一种开源代码的计算机视觉库,以可兼容多平台、接口广泛的特点被广泛运用各个领域。在低照度条件下,会出现光照环境差异过大或光线不足等情况,导致传统图像采集系统不能采集高质量的人脸图像,局限性较差。提出基于OpenCV在C 环境配置下运用三维人脸识别技术算法,设计一套低照度条件下超分辨率人脸图像采集系统。实验证明,该设计方案具有实时(对焦速度快)、快速(单张采集0.05秒)、准确(面部识别率99.3%)等特点,能够充分满足低照度条件下超分辨率人脸图像采集的需求。 相似文献
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A. A. Krasnobaev A. K. Platonov 《Journal of Computer and Systems Sciences International》2007,46(4):606-619
The paper is devoted to the problem of formalization of software-hardware solutions in designing real-time computer vision systems. The main attention is paid to the methods of implementation of low-level operations that find features (simple elements) in the image input to the system. Algorithmic types of detectors of simple elements in images are analyzed from the point of view of hardware organization in computer vision systems. In this connection, the necessary performance and memory resources are estimated. The capabilities of parallel and pipeline execution of detector algorithms are investigated. A method of using a field programmable gate array and a digital signal processor in solving the problem of image processing in real-time computer vision systems is considered in detail. 相似文献
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Estimation of scene illumination from a single image or an image sequence has been widely studied in computer vision. The approach presented in this paper, introduces two new issues: (1) illumination classification is performed rather than illumination estimation; (2) an object-based approach is used for illumination evaluation. Thus, pixels associated with an object are considered in the illumination estimation process using the object's spectral characteristics. Simulation and real image experiments, show that the object-based approach indeed improves performance over standard illumination classification. 相似文献
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随着计算机软件与硬件技术的发展,计算机视觉算法逐渐成为图像处理领域的研究热点.其中SIFT(scale invariant feature transform)算法是目前机器视觉领域应用最成功的算法之一.由于在尺度不变、旋转不变、光照不变等方面的独特优势,SIFT被广大视觉领域的研究者借鉴与学习.但是SIFT算法本身也存在一些问题,如仿射性能不太理想,计算复杂度过高等,因此针对它的多种改进算法不断出现.本文对SIFT的发展历史、SIFT算法的演变以及它不同领域的典型应用给出了一个比较全面的综述,比较了各类算法的优缺点.最后给出了该算法未来可能的发展方向,为视觉研究者提供参考. 相似文献
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计算机视觉在智能制造工业检测中发挥着检测识别和定位分析的重要作用,为提高工业检测的检测速率和准确率以及智能自动化程度做出了巨大的贡献。然而计算机视觉在应用过程中一直存在技术应用难点,其中3大瓶颈问题是:计算机视觉应用易受光照影响、样本数据难以支持深度学习、先验知识难以加入演化算法。这些瓶颈问题使得计算机视觉在智能制造中的应用无法发挥最佳效能。因此,需要系统地加以分析和解决。本文总结了智能制造和计算机视觉的概念及其重要性,分析了计算机视觉在智能制造工业检测领域的发展现状和需求。针对计算机视觉应用存在的3大瓶颈问题总结分析了问题现状和已有解决方法。经过深入分析发现:针对受光照影响大的问题,可以通过算法和图像采集两个环节解决;针对样本数据难以支持深度学习的问题,可以通过小样本数据处理算法和样本数量分布平衡方法解决;针对先验知识难以加入演化算法的问题,可以通过机器学习和强化学习解决。上述解决方案中的方法不尽相同,各有优劣,需要结合智能制造中具体应用研究和改进。 相似文献
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该文探讨了可用于图像处理与计算机视觉编程的强大类库OpenCV,该类库使用起来极为方便,利用OpenCV中的数字图处理和计算机视觉的函数处理相关问题变得很简单。该文首先介绍OpenCV的强大功能以及研究的意义,然后介绍了OpenCV新版本的一些特点,并且讨论在VC++环境下的软件设置问题,最后给出了典型的图像处理的实例。随着计算机视觉和数字图像处理技术不断深入各个领域,OpenCV为VC++编程处理数字图像提供了极大的方便,具有广阔的应用前景,该文对于图像处理与计算机视觉方面的应用设计以及研究开发都将具有重要参考价值。 相似文献
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Applying computer vision to mobile robot navigation has been studied more than two decades. For the commercial off-the-shelf (COTS) automated guided vehicles (AGV) products, the cameras are still not widely used for the acquisition of guidance information from the environment. One of the most challenging problems for a vision guidance system of AGVs lies in the complex illumination conditions. Compared to the applications of computer vision where on-machine cameras are fixed in place, it is difficult to structure the illumination circumstance for an AGV that needs to travel through a large work space. In order to distinguish the original color features of path images from their illumination artifacts, an illumination-adaptive image partitioning approach is proposed based on the support vector machine (SVM) classifier with the slack constraint and the kernel function, which is utilized to divide a path image to low-, normal-, and high-illumination regions automatically. Moreover, an intelligent path recognition method is developed to carry out guide color enhancement and adaptive threshold segmentation in different regions. Experimental results show that the SVM-based classifier has the satisfactory generalization ability, and the illumination-adaptive path recognition approach has the high adaptability to the complex illumination conditions, when recognizing the path pixels in the field of view with both high-reflective and dark-shadow regions. The 98% average rate of path recognition will significantly facilitate the subsequent operation of path fitting for vision guidance of AGVs. 相似文献
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Today, there is a growing demand for computer vision and image processing in different areas and applications such as military surveillance, and biological
and medical imaging. Edge detection is a vital image processing technique used as a pre-processing step in many computer vision algorithms. However, the
presence of noise makes the edge detection task more challenging; therefore, an image restoration technique is needed to tackle this obstacle by presenting an
adaptive solution. As the complexity of processing is rising due to recent high-definition technologies, the expanse of data attained by the image is increasing
dramatically. Thus, increased processing power is needed to speed up the completion of certain tasks. In this paper,we present a parallel implementation
of hybrid algorithm-comprised edge detection and image restoration along with other processes using Computed Unified Device Architecture (CUDA)
platform, exploiting a Single Instruction Multiple Thread (SIMT) execution model on a Graphical Processing Unit (GPU). The performance of the proposed
method is tested and evaluated using well-known images from various applications. We evaluated the computation time in both parallel implementation on
the GPU, and sequential execution in the Central Processing Unit (CPU) natively and using Hyper-Threading (HT) implementations. The gained speedup for
the naïve approach of the proposed edge detection using GPU under global memory direct access is up to 37 times faster, while the speedup of the native
CPU implementation when using shared memory approach is up to 25 times and 1.5 times over HT implementation. 相似文献