共查询到19条相似文献,搜索用时 151 毫秒
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针对数字图像处理中的典型去噪方法,采用均值滤波、中值滤波和维纳滤波来达到较理想的滤波效果,并用MATLAB对不同的滤波方法进行分析处理。从分析处理的结果中可以看出,对加了不同噪声类型的同一图像,用同一种滤波方法进行处理以及对加了不同噪声类型的同一图像用不同的滤波方法进行处理时,图像的去噪效果不同。 相似文献
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随着我国的社会经济和科学技术的不断发展,国家对于计算机技术的发展越来越重视。在基于数字图像处理之中,对于输电线路进行监控工作是一项十分繁重和复杂的工作项目。因此,就需要相关的工作人员利用更加便利的方式进行输电线路的监控工作,其中的利用数字图像处理的方式对相邻的两个塔杆之间的单条输电线路曲线进行计算,从而能够更加方便的对所需要的数据和信息进行计算。具体的实施方式就是利用数字图像处理方式对输电线路的图像进行一些处理,其目的是为了采取到输电线路的边缘处理图像,然后再对输电线路的边缘图像进行实时的追踪,最后再利用计算机对边缘处理图像进行计算,经过多次反复的修改就能够得到最终的单条输电线路的曲线。 相似文献
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介绍了数字图像处理技术在微小运动物体状态监控中的应用,论述了图像序列的获取以及几种数字图像处理算法,指出相关算法的优越性。并对微球运动状态进行了实时监控,分析了应用结果。 相似文献
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基于数字图像处理和特征提取的钢轨表面缺陷识别方法 总被引:1,自引:0,他引:1
设计了一种基于图像特征分析的钢轨表面缺陷识别方法,运用快速数字图像处理技术可实现钢轨表面裂缝和剥离掉块缺陷的提取,该识别方法通过对采样图像使用高低帽变换进行图像增强,再进行高斯平滑消除毛刺,最后采用阈值处理及边界抑制来提取出缺陷信息。研究了钢轨伤损评价及信息表达方法,可将缺陷信息以曲线的形式表示出来。为验证所设计方法的有效性,设计了模拟实验装置,用工业线阵CCD摄像机获取钢轨样品运动时检测的图像,进行缺陷识别处理,实验表明,系统输出曲线能够明确反映损伤的程度及其位置信息。 相似文献
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一种新型炉膛火焰温度图像检测仪 总被引:1,自引:1,他引:0
娄春 《工业仪表与自动化装置》2004,(5):60-62,59
设计了一种新型的便携式炉膛火焰温度图像检测装置,系统由便携式炉膛火焰探测器及基于DSP的数字电路组成,通过对火焰辐射图像的处理直接给出火焰温度图像的检测结果。温度检测方法是采用基于彩色火焰图像r、g、b三基色的综合测温法,该方法通过黑体炉的标定具有较高的测量精度。在一台300MW电站锅炉上的仿真实验表明,炉膛内的燃烧温度与负荷的变化相同,检测结果与比色高温计检测结果相比,误差在5%之内。 相似文献
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Eisaku Oho 《Scanning》1992,14(6):335-344
A new digital filter method has been developed for enhancement of detail recognition in SEM images of high signal-to-noise ratio using an on-line digital image processing system. The filter allows an automated improvement of the presentation of SEM image information and utilizes a median filter of very large mask size and histogram equalization. Since the method can be performed without input of any processing parameters, the user simply pushes a button for obtaining the processing result similar to conventional photo recording. The method utilizes digital signal processors for establishing high speed, hence, the processing results can be immediately assessed. When Applied to a variety of field-emission SEM images, there were no problems with inconvenient artifact encountered. 相似文献
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This article introduces an improved approach for the characterization of in-plane rigid-body vibration, based on digital processing of stroboscopic images of the moving part. The method involves a sample preparation step, in order to pattern a periodic microstructure on the vibrating device, for instance, by focused ion beam milling. An image processing method has then been developed to perform the optimum reconstruction of this a priori known object feature. In-plane displacement and rotation are deduced simultaneously with a high resolution (10-2 pixel and 0.5 x 10(-3) rad, respectively). The measurement principle combines phase measurements-that provide the high resolution-with correlation-that unwraps the phase with the proper phase constants. The vibration modes of a tuning fork are used for demonstrating the capabilities of the method. For applications allowing the sample preparation, the proposed methodology is more convenient than common interference methods or image processing techniques for the characterization of the vibration modes, even for amplitudes in the nanometer range. 相似文献
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在燃煤火力发电站的煤粉输送系统中,为了提高煤粉的燃烧效率,获得煤粉与空气混合物的参数就显得至关重要。本文提出一种基于图像处理技术的气/固两相流固体颗粒速度测量方法。通过控制CCD照相机的曝光时间获得颗粒的运动模糊图像,在此基础上利用图像处理方法估计出模糊图像的点扩展函数(PSF),并利用透镜成像原理建立运动模糊长度与颗粒运动速度之间的联系,最终获得颗粒的运动速度。在此理论分析的基础上,本文利用该方法对颗粒自由落体形成的运动模糊图像进行了处理,仿真及实验结果表明该方法适用于气/固两相流颗粒速度的测量。 相似文献
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A simple method for the acquisition of high-quality digital images from analog scanning electron microscopes 总被引:2,自引:0,他引:2
A method is described for converting video signals of analog scanning electron microscopes (SEMs) into digital images of high quality. A plug-in card commercially available for personal computers is used for the on-line analog/digital conversion. A Windows application program written by the authors, together with low-level software drivers supplied with the plug-in card, allow digital images to be recorded, to be displayed simultaneously on the computer monitor and to be saved as a file in a standardized format. Compared to conventional photographic images obtained from the SEM camera system, the digital images possess superior sharpness of outline, excellent image definition, diminished noise and well-defined grey-scale tones. This method provides SEM images of high quality for less than $1000 from most older analog SEMs. In addition, the advantages of digital image processing can be applied to analog SEMs, including contrast enhancement, digital filtering and multichannel recording. 相似文献