共查询到18条相似文献,搜索用时 406 毫秒
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玻璃基板是显示器屏幕无法替代的材料,其缺陷检测显得尤为重要。文章就不同光源对基板玻璃缺陷的检测进行了论述,以期对生产和加工行业的玻璃基板缺陷检测有指导意义。 相似文献
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机器视觉技术在玻璃基板缺陷检测设备中的应用 总被引:1,自引:0,他引:1
简单介绍了机器视觉的基本概念及相关组成,分析了以机器视觉为理论基础的光学检测设备在玻璃基板缺陷检测中的应用。通过对玻璃基板常见缺陷的介绍,指出了相关检测设备在具体的缺陷检测中需要注意的事项。 相似文献
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Fabric defect detection plays an important role in the textile production process, but there are still some challenges in detecting defects rapidly and accurately. In this paper, we propose a powerful detection method for automatic fabric defect detection using a deep convolutional neural network (CNN). It consists of three main steps. First, the fabric image is decomposed into local patches and each local patch is labelled. Then the labelled patches are transmitted to the pretrained deep CNN for transfer learning. Finally, defects are detected during the inspection phase by sliding over the whole image using the trained model, and the category and position of each defect is obtained. The proposed method is validated on two public and one self‐made fabric database. The experimental results demonstrate that our method significantly outperforms selected state‐of‐the art methods in terms of both quality and robustness. 相似文献
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Chung-Feng Jeffrey Kuo Chin-Hsun Chiu You-Chen Chou 《Polymer-Plastics Technology and Engineering》2013,52(2):185-192
This paper aimed at developing a set of on-line real-time defect inspection system for Polymer polarizer. It intended to help producers make different improvements for the spot or line defects in manufacturing on-line polarizer. This paper used line-scan charged couple device (CCD) to capture the defect images of polarizer: firstly, to scale down the captured images by 64 times with downsampling compression; then, we utilized Laplace operator to find out the edges of defects and the shield with isotropic results for 45° and 90° incremental rotation. Subsequently, we used the statistical decision method of threshold value to divide up the edges of defects that were discovered with Laplace operator from the image. Eventually, we differentiated the spot defects, like dust, foreign objects, scars of hit and air bubbles in the production process from the line defects, like scratches in the follow-up handling process with the straight line detection characteristic of Hough Transform. This paper captured 200 pieces of defect images of polarizer samples in all and then input them to the inspection system developed by ourselves for test. The differentiation rate of defects amounted to 98%, which proved that we had successfully developed a set of on-line real time automatic optical inspection (AOI) system suitable to be applied to polymer polarizer. 相似文献
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Yi-Hung Liu Chi-Kai Wang Yung Ting Wei-Zhi Lin Zhi-Hao Kang Ching-Shun Chen Jih-Shang Hwang 《International journal of molecular sciences》2009,10(10):4498-4514
Defect inspection plays a critical role in thin film transistor liquid crystal display (TFT-LCD) manufacture, and has received much attention in the field of automatic optical inspection (AOI). Previously, most focus was put on the problems of macro-scale Mura-defect detection in cell process, but it has recently been found that the defects which substantially influence the yield rate of LCD panels are actually those in the TFT array process, which is the first process in TFT-LCD manufacturing. Defect inspection in TFT array process is therefore considered a difficult task. This paper presents a novel inspection scheme based on kernel principal component analysis (KPCA) algorithm, which is a nonlinear version of the well-known PCA algorithm. The inspection scheme can not only detect the defects from the images captured from the surface of LCD panels, but also recognize the types of the detected defects automatically. Results, based on real images provided by a LCD manufacturer in Taiwan, indicate that the KPCA-based defect inspection scheme is able to achieve a defect detection rate of over 99% and a high defect classification rate of over 96% when the imbalanced support vector machine (ISVM) with 2-norm soft margin is employed as the classifier. More importantly, the inspection time is less than 1 s per input image. 相似文献
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针织用涤纶短纤维对纤维质量特别是疵点的含量要求较高,目前纤维中疵点的检验方法有手检法和原棉分析机法,这两种方法只能检出质量在0.1 mg以上的疵点,而针织用短纤更关注0.1 mg以下的小疵点,现有的分析方法无法满足下游纺织用户的质量要求。建立了一种新的疵点检验方法——染色疵点分析方法,先对纤维进行染色,然后再挑出异常纤维即疵点。 相似文献
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为了克服传统人工检测方法效率低、自动化和智能化程度低等缺陷,设计了一种基于机器视觉的塑料制品外观缺陷检测方法,利用摄像机进行制品外观缺陷检测,实现制品生产流水线的自动化、智能化检测.介绍了机器视觉检测系统组成.为了提高机器视觉检测系统准确率,对采集到的图像进行了均值滤波和边缘分割检测.结果表明:机器视觉检测系统能够实现... 相似文献
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在对低频导波与远场涡流技术原理进行初步分析的基础上,提出了低频导波与远场涡流组合技术应用于工业管道腐蚀缺陷检测的方法:首先用低频导波技术对管道进行快速扫描,在发现异常信号区域,利用远场涡流技术进行缺陷精确定位并量化。利用该组合技术对某架空管段缺陷进行了检测应用,结果表明两种技术能相互补充,并有效提升了管体腐蚀缺陷的检测效果。 相似文献