共查询到19条相似文献,搜索用时 46 毫秒
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《中国计量学院学报》2015,(1):105-109
针对我国蔬菜类食品安全追溯系统中有关种类信息采集存在的一些问题,提出了一种利用图像纹理分析技术对多种蔬菜进行识别分类,进而提高信息采集的准确性与高效性.实验中分别用灰度共生矩阵算法(GLCM)、高斯马尔可夫模型法(GMRF)和Gabor法分别对蔬菜的纹理进行特征提取,并通过支持向量机(SVM)分类对比.结果证明,由灰度共生矩阵对蔬菜种类识别可以得到较好的分类结果. 相似文献
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针对基于振动信号故障诊断存在的接触式测量弊端及传统声学故障诊断只反映部分声学信息问题,将近场声全息技术引入故障诊断克服该缺陷。基于LabVIEW平台开发出的非接触式机械故障诊断系统,利用近场声全息重建机械声源面附近声压场,得到可视化声源的声像图;从声像图中提取反映声场空间分布的灰度共生矩阵特征,结合支持向量机模式识别实现智能故障诊断。该系统具备智能诊断测试、声源可视化、数据分析等功能,操作方便,可用性强。通过对齿轮箱故障诊断,正确率达97.3%。与传统声学诊断方法的对比,证明该系统可靠、实用。 相似文献
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为了解决异种材料扩散焊质量超声波检测时,从回波幅度无法判断界面是否存在微小缺陷的问题,采用支持向量机技术构建了扩散焊界面缺陷识别模型.以TiAl和40Cr扩散焊接头为研究对象,采用超声波水浸聚焦法采集扩散焊界面信号,从信号中提取4个特征值,优化样本数量和核参数后,训练扩散焊界面缺陷识别模型.扩散焊试样界面信号经模型识别后,根据C扫描图像的位置重构识别图像.结果表明,该模型有效地识别出未焊合、弱接合和微孔缺陷,3种缺陷的正确识别率分别为93%、90.5%和91.5%,识别图像直观地显示了界面的缺陷.TiAl/40Cr扩散焊界面缺陷识别模型实现了扩散焊试样界面缺陷的智能识别. 相似文献
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小包烟包装质量机器视觉检测关键技术研究 总被引:1,自引:1,他引:1
针对烟草企业对小包烟包装质量精密检测的需要,提出基于机器视觉的检测系列关键技术,包括了小包烟图像采集装置、基于快速Hough变换的小包边缘快速提取算法、基于灰度共生矩(GLCM)参数快速在线判别算法、基于支持向量机(SVMs)的包装缺陷识别等.该关键技术不仅适应在线快速包装质量检测,而且能准确判断缺陷类型.实验证明该关键技术具有实用可靠等优点,可应用到小包烟生产现场. 相似文献
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一种铝塑泡罩药品包装缺陷检测方法 总被引:1,自引:1,他引:1
目的针对铝塑泡罩药品人工检测时存在的包装缺陷,如效率低、成本高、稳定性差等,采用机器视觉技术对铝塑泡罩药品包装进行缺陷检测。方法采用快速鲁棒特征SURF提取算法、BOW算法和单分类支持向量机组成的缺陷检测算法框架,并完成铝塑泡罩药品包装缺陷检测系统的开发。通过搭建的实验平台获取280幅铝塑泡罩药品图像,并采用文中所提方法对180幅图像实施缺陷检测。结果实验结果显示,在阈值为1900、视觉单词数量为120、惩罚因子为0.9时,文中方法的准确率为99.4%。结论文中方法提高了铝塑泡罩药品包装缺陷检测的准确率和稳定性。 相似文献
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简述了我厂引进设备——西德CARTEX-12型粉状炸药自动装药机的技术特点及其在生产应用中的实效,并结合行业技术发展浅析了推广应用的前景。 相似文献
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The microwave communication substrate is currently using manual inspection from ultrasonic image. The bubble defect ratio is an important index for evaluating the quality of the substrate. It is difficult to formalise standards for the quality inspection procedure by an operator since different numbers of bubbles may be realised. This paper proposes a novel inspection procedure for the calculation of the bubble ratio of microwave communication substrate. First, the optimal threshold is determined for binary image segmentation on the basis of a co-occurrence matrix. Further, the image of the microwave communication substrate is divided into three parts, namely, the image skeleton area, soldering area, and IC working area. The image subtraction technique is used to obtain the global and critical regions for bubbles. After data analysis, if the critical region bubble ratio is larger than 10% of the critical region, then it is judged to be a defect. When a substrate is judged to be non-defective, we should further proceed with the global area detection. If the global region bubble ratio is larger than 12.3% of the global region, then it is judged as a defect. An experiment was conducted to demonstrate the application of this technique. The results showed that the inspection accuracy reached 97.49%. The results of this study provide an effective solution for the inspection of the interface bond quality of a microwave communication substrate. 相似文献
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Xiangchun Liu Jing Yu Wei Song Xinping Zhang Lizhi Zhao Antai Wang 《计算机、材料和连续体(英文)》2020,65(2):1385-1395
With the development of satellite technology, the satellite imagery of the
earth’s surface and the whole surface makes it possible to survey surface resources and
master the dynamic changes of the earth with high efficiency and low consumption. As
an important tool for satellite remote sensing image processing, remote sensing image
classification has become a hot topic. According to the natural texture characteristics of
remote sensing images, this paper combines different texture features with the Extreme Learning Machine, and proposes a new remote sensing image classification algorithm.
The experimental tests are carried out through the standard test dataset SAT-4 and SAT-6.
Our results show that the proposed method is a simpler and more efficient remote sensing
image classification algorithm. It also achieves 99.434% recognition accuracy on SAT-4,
which is 1.5% higher than the 97.95% accuracy achieved by DeepSat. At the same time,
the recognition accuracy of SAT-6 reaches 99.5728%, which is 5.6% higher than
DeepSat’s 93.9%. 相似文献
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针对炸药药卷包装缺陷,开发了药卷包装缺陷在线视觉检测系统。对系统结构、视觉成像系统进行了描述,并详细介绍了检测方法。采用该方法对获取的药卷图像预处理,并计算药卷轮廓特征,将得到的药卷特征参数与预先建立的药卷标准模板进行对比。试验和应用表明,该方法对3类常见包装缺陷检测准确率不低于96%,所开发的系统可以快速、准确地检测药卷缺陷,能满足实际炸药包装生产过程在线检测的需要。 相似文献
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Junjia Chen Wei Lu Yuileong Yeung Yingjie Xue Xianjin Liu Cong Lin Yue Zhang 《计算机、材料和连续体(英文)》2018,55(2):201-211
In recent years, binary image steganography has developed so rapidly that the research of binary image steganalysis becomes more important for information security. In most state-of-the-art binary image steganographic schemes, they always find out the flippable pixels to minimize the embedding distortions. For this reason, the stego images generated by the previous schemes maintain visual quality and it is hard for steganalyzer to capture the embedding trace in spacial domain. However, the distortion maps can be calculated for cover and stego images and the difference between them is significant. In this paper, a novel binary image steganalytic scheme is proposed, which is based on distortion level co-occurrence matrix. The proposed scheme first generates the corresponding distortion maps for cover and stego images. Then the co-occurrence matrix is constructed on the distortion level maps to represent the features of cover and stego images. Finally, support vector machine, based on the gaussian kernel, is used to classify the features. Compared with the prior steganalytic methods, experimental results demonstrate that the proposed scheme can effectively detect stego images. 相似文献
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