改进的Canny算法在IC芯片引脚检测中的应用

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"应用改进的Canny算法于IC芯片引脚检测" 本文主要探讨了在IC芯片引脚缺陷自动化检测中,机器视觉技术的应用及其关键环节——图像边缘检测的重要性。Canny算法作为一种综合评价良好的边缘检测算法,常被用于此类场景。然而,Canny算法依赖的高斯滤波器可能导致图像过于平滑,边缘模糊,并且对脉冲噪声非常敏感。针对这些问题,文章提出了一种改进的开关中值滤波算法,并将其应用到Canny算法中,以提高边缘检测的完整性和噪声消除效果。 关键词:Canny算法,边缘检测,开关中值滤波,IC芯片,表面贴装技术(SMT),引脚检测,图像处理 引言 随着电子技术的快速发展,IC芯片的制造工艺要求越来越高,其中引脚缺陷的自动化检测至关重要。图像处理技术在此领域扮演着核心角色,尤其是边缘检测,因为它直接影响到检测结果的准确性。传统的Canny算法虽然在边缘定位和抑制噪声方面表现出色,但其不足之处在于对噪声的处理能力较弱,容易导致边缘细节丢失。 改进的Canny算法 为了克服这些问题,作者提出了一个改进的策略,即在Canny算法的预处理阶段引入开关中值滤波器。与传统的中值滤波器相比,开关中值滤波器可以动态地选择是否使用中值操作,这样既能有效地去除脉冲噪声,又能保持图像的边缘特性。当像素点周围的噪声水平较高时,开关中值滤波器会启用中值滤波;而在噪声水平较低的区域,它则保持原始像素值,从而避免了过度平滑。 实验与结果 通过一系列实验,该方法被证实是可行且有效的。对比未改进的Canny算法,改进后的算法在保持边缘完整性的同时,显著提升了噪声消除能力,增强了芯片引脚检测的精确度。这一改进对于提升整个检测系统的稳定性和可靠性具有重要意义,尤其在表面贴装技术(SMT)这样的高速生产环境中,准确的引脚检测对于保证产品质量至关重要。 结论 将改进的开关中值滤波器应用于Canny算法,为IC芯片引脚的图像边缘检测提供了一个更优的解决方案。这种结合不仅保留了Canny算法的优点,还解决了其对噪声敏感和图像平滑过度的问题。未来的研究可能进一步优化此方法,以适应更多复杂环境下的芯片检测需求。

Traditional network security situation prediction methods depend on the accuracy of historical situation value. Moreover, there are differences in correlation and importance among various network security factors. In order to solve these problems, a combined prediction model based on the temporal convolution attention network (TCAN) and bi-directional gate recurrent unit (BiGRU) network optimized by singular spectrum analysis (SSA) and improved quantum particle swarm optimization algorithm (IQPSO) was proposed. This model was first decomposed and reconstructed into a series of subsequences through the SSA of network security situation data. Next, a prediction model of TCAN-BiGRU was established for each subsequence, respectively. The TCN with relatively simple structure was used in the TCAN to extract features from the data. Besides, the improved channel attention mechanism (CAM) was used to extract important feature information from TCN. Afterwards, the before-after status of the learning situation value of the BiGRU neural network was used to extract more feature information from sequences for prediction. Meanwhile, an improved IQPSO was proposed to optimize the hyper-parameter of the BiGRU neural network. Finally, the prediction results of subsequence were superimposed to obtain the final predicted value. In the experiment, on the one hand, the IQPSO was compared with other optimization algorithms; and the results showed that the IQPSO has better optimization performance; on the other hand, the comparison with traditional prediction methods was performed through the simulation experiment and the established prediction model; and the results showed that the combined prediction model established has higher prediction accuracy.

2023-02-19 上传

Shifts in China’s Rural and Urban Population: 2000-2020 The bar chart clearly reveals that from 2000 to 2020, while the total population in China increased moderately from 1.25 billion to 1.41 billion, population in urban and rural areas experienced dramatic shifts in different directions. Urban population rose from 450 million in 2000 to 670 million in 2010 and 900 million in 2020; contrastingly, rural population declined from 800 million in 2000 to 680 million in 2010 and 510 million in 2020. The population gap narrowed largely because of the joint effects of urbanization, unequal economic opportunities in rural and urban areas, and the expansion of higher education. In the first place, there was a large-scale urban sprawl during this period. Places which had been part of the vast countryside were incorporated into cities, causing hundreds of millions of rural dwellers to be passively transformed into urban residents. What’s more, while urban living standards improved greatly in these years, few economic opportunities fell on rural areas and most peasant families remained at the poverty line. Poverty prompted the call for change, leading a large quantity of healthy young peasants to leave their hometowns and flock to cities for a better living. Last but not least, China’s higher education grew at an unprecedented rate in these years. More high school graduates than ever before entered colleges and universities, most of whom preferred to stay in urban areas after graduation for personal development. The increase in urban population was a sure indication of economic and educational achievements in China. It benefited the country in many aspects, relieving the shortage of labor force in cities, lessening the burden of peasants to support their families, and affording young people from rural areas more opportunities to display their talents. However, the migration of rural residents into urban areas inevitably brought about disadvantages. Some of them, such as waste of arable land and left-behind children in the countryside, as well as traffic congestion and soaring housing prices in cities, have already called the attention of the government and corresponding measures have begun to take effect. But others, especially the inability of many peasants to integrate into urban life due to their lack of education and civilized habits, have long been neglected. In this sense, we cannot be satisfied with the superficially optimistic figures in the chart, but should endeavor to foster the integration of these newcomers by providing them with adequate assistance in educational and cultural aspects, so that they can find easier access to the prosperity and convenience of urban life and be more fully devoted to the development of cities.翻译成英文版两百单词左右的文章

2023-02-21 上传