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研究一种基于高速处理芯片TMS320C5416的印刷品质量在线检测系统.对印刷品质量在线检测系统的图像采集部分做了分析,确定了以线阵CCD为中心的印刷品图像采集系统;分析TMS320C5416的特点,介绍了各硬件设备的原理及在系统中的应用.对图像定位、图像匹配算法进行比较,实现了缺陷产品的自动检测技术. 相似文献
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印刷品缺陷检测技术有着重要的实际意义。介绍了基于数字图像处理的印刷品缺陷检测系统的设计,并对主要模块即图像采集及预处理、模板制作、图像对准、缺陷检测进行了分析研究。实验结果表明,充分考虑人眼视觉特性,将动态阈值法引入缺陷检测,能够显著提高印刷质量检测系统的检测精度。 相似文献
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印刷品缺陷检测的初步方案 总被引:1,自引:0,他引:1
印刷品缺陷检测技术有着重要的实际意义。介绍了基于数字图像处理的印刷品缺陷检测系统的设计,并对主要模块即图像采集及预处理、模板制作、图像对准、缺陷检测进行了分析研究。实验结果表明,充分考虑人眼视觉特性,将动态阈值法引入缺陷检测,能够显著提高印刷质量检测系统的检测精度。 相似文献
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产品表面图像中的缺陷自动检测方法研究 总被引:4,自引:0,他引:4
仔细设计产品表面缺陷检测的图像识别算法是基于图像处理的产品表面缺陷自动检测系统快速并正确地检测缺陷的关键。以E型磁环表面缺陷的自动检测为例,分析了产品表面图像的特征,用梯度直方图自适应阈值分割的方法对图像进行增强和分割;并提出了一种新的快速识别算法对分割后的目标图像进行检测,实验结果表明了该算法的有效性和实用性。 相似文献
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基于机器视觉的发动机表面缺陷检测技术 总被引:1,自引:0,他引:1
发动机表面的缺陷检测是保证其使用安全性的重要手段。本文应用机器视觉技术实现发动机内表面缺陷的自动检测,用内窥镜采集发动机装药内表面的图像,结合图像特点,通过多次实验对比,选择中值滤波方法对图像进行滤波、Canny算子检测图像边缘,应用像素灰度的相似性和不连续性将缺陷从图像背景中分割出来,在此基础上,选取面积和周长特征作为缺陷判断依据,并将以上功能进行整合,设计缺陷自动检测系统。实验结果表明该方法在发动机内表面缺陷检测方面有较好的效果。 相似文献
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钢板表面质量机器视觉检测系统设计 总被引:1,自引:0,他引:1
针对国内钢厂采用人工方法检查钢板表面缺陷存在可靠性差的问题,开发设计了基于机器视觉技术的带钢表面缺陷自动检测系统.系统通过摄像头采集带钢表面的图像,然后采用图像处理及模式识别算法对图像进行实时处理和分析,从而检测出钢扳表面缺陷,并对缺陷进行自动分类识别.实验结果表明,系统能够对带钢表面进行实时在线监测,并能正确识别常见的带钢表面缺陷. 相似文献
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《微型机与应用》2016,(10):52-54
随着液晶的普及,对液晶屏生产过程中质量控制提出更高的要求,液晶屏裂痕自动检测系统应运而生,它能真正实现高效率、高稳定性的实时检测。针对液晶屏裂痕缺陷中的"线缺陷"、"点缺陷"进行深入研究,把机器视觉、数字图像处理技术运用到液晶屏裂痕自动检测系统中,并以HALCON和VC++联合编程完成了裂痕自动检测系统的设计。在数字图像处理部分,根据指定尺寸对图像进行傅里叶变换、高斯滤波、迭代处理等一系列操作,为了得到更清晰的图像,突出裂痕区域,对图像进行灰度化、频域图像卷积、滤波去噪、形态学处理。选择出适合在线测量的各种算法,进行了大量实验测试和实时自动检测,结果表明,该方法在识别液晶屏裂痕的几何特征上效果和精度较好,识别速度达到在线要求。 相似文献
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This study presents an image segmentation system that automatically segments and labels T1-weighted brain magnetic resonance (MR) images. The method is based on a combination of unsupervised learning algorithm of the self-organizing maps (SOM) and supervised learning vector quantization (LVQ) methods. Stationary wavelet transform (SWT) is applied to the images to obtain multiresolution information for distinguishing different tissues. Statistical information of the different tissues is extracted by applying spatial filtering to the coefficients of SWT. A multidimensional feature vector is formed by combining SWT coefficients and their statistical features. This feature vector is used as input to the SOM. SOM is used to segment images in a competitive unsupervised approach and an LVQ system is used for fine-tuning. Results are evaluated using Tanimoto similarity index and are compared with manually segmented images. Quantitative comparisons of our system with the other methods on real brain MR images using Tanimoto similarity index demonstrate that our system shows better segmentation performance for the gray matter while it gives average results for white matter. 相似文献
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A new image segmentation system is presented to automatically segment and label brain magnetic resonance (MR) images to show normal and abnormal brain tissues using self-organizing maps (SOM) and knowledge-based expert systems. Elements of a feature vector are formed by image intensities, first-order features, texture features extracted from gray-level co-occurrence matrix and multiscale features. This feature vector is used as an input to the SOM. SOM is used to over segment images and a knowledge-based expert system is used to join and label the segments. Spatial distributions of segments extracted from the SOM are also considered as well as gray level properties. Segments are labeled as background, skull, white matter, gray matter, cerebrospinal fluid (CSF) and suspicious regions. 相似文献
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工业循环冷却水系统管理软件 总被引:1,自引:0,他引:1
陈文闯 《计算机与应用化学》1998,15(3):189-192
本文介绍了我们自开发的一种工业循环冷却水管理数据软件,该软件基于Windows平台,可进行工艺数据的存储,查询,并可自动生成报表供观看和选择性打印输出。 相似文献
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Chih-Chien Huang Huang-Chu Huang Yu-Ju Chen Rey-Chue Hwang 《Expert systems with applications》2009,36(5):9580-9583
In this paper, an artificial intelligent mechanism for the decision of control parameters of touch panel film printing was developed. This mechanism is capable of providing the accurate information for the control parameters of the film printing, so that the technician could make a good setting work for the real-line manufacturing operation of touch panel film. Thus, this system not only can help the technician to improve the efficiency on the work of film printing, but also can reduce the cost caused by the defective products for the company. In our study, this intelligent system was constructed by using quantum neural network. It can automatically display the proper value of each control parameter needed for the film printing when the thickness of film is determined. 相似文献
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唐照斌 《自动化技术与应用》2012,31(2):62-65,88
利用PC机、PLC为主要硬件,组态王软件为开发平台,组成计算机控制系统,构建压力表自动检定装置。根据检定规程要求,由计算机控制造压系统,任意设置压力点,实现检定过程自动化。装置自动采集标准压力值,自动计算示值误差、回程变差、轻敲位移,与检定规程允许误差计算一览表比较,自动判定压力表的合格与否。实现可视的操作界面、保存检定数据、打印检定证书。 相似文献
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基于多色集合理论的印刷工艺规划建模研究 总被引:2,自引:0,他引:2
在研究印刷工艺的加工需求和加工工序的基础上,将计算机辅助工艺设计引入印刷制造系统,并应用多色集合理论建立印刷工艺规划的数学模型,提出了一种基于此模型的印刷工艺路径求解算法。此数学模型包括围道矩阵和多色图两部分。围道矩阵描述了印刷工序实现印刷加工需求的关系,多色图描述了印刷工序的相互作用。该算法便于计算机编程的实现,能根据印刷加工需求搜索所需的工艺算子,然后求解出印刷品的印刷工艺路线。最后,通过简例分析,对所提出的模型与算法进行了验证。 相似文献
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S. Mizuno T. Kasaura T. Okouchi S. Yamamoto M. Okada & J. Toriwaki 《Computer Graphics Forum》2000,19(3):51-58
In this paper, we study a method to synthesize a multicolor virtual woodblock print by using several virtual woodblocks. It consists of two sections: carving and printing, to synthesize a virtual print. In the carving section, virtual woodblocks are generated by a user with supporting of an automatically carving method based on feature extraction of a gray value image. And woodblocks are also generated automatically by using a full-color image as a draft. In the printing section, a "paper sheet", a "printing brush" and "ink" are prepared in addition to the "woodblock" in the virtual space and the user synthesizes a woodblock print interactively. As the printing factors, a color of ink, a moisture value and a grain change the finish of the print. Using several virtual woodblocks and printing to a paper sheet in succession, a printing image of each woodblock is combined based on the printing factors and a multicolor virtual prints is synthesized. 相似文献