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引入Petri网概念的可视编程系统的设计
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作者 滕至阳 徐安源 《东南大学学报(自然科学版)》 EI CAS CSCD 1996年第6期68-73,共6页
引进Petri网概念刻划图标的动态行为和相互作用并给邮一个可视化编程系统,通过例子说明本系统在编程阶段和程序运行阶段所采用的可视化技术。
关键词 可视化程序设计 PETRI网 可视编程系统 程序设计
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A real-time 5/3 lifting wavelet HD-video de-noising system based on FPGA
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作者 黄巧洁 Liu Jiancheng 《High Technology Letters》 EI CAS 2017年第2期212-220,共9页
In accordance with the application requirements of high definition(HD) video surveillance systems,a real-time 5/3 lifting wavelet HD-video de-noising system is proposed with frame rate conversion(FRC) based on a field... In accordance with the application requirements of high definition(HD) video surveillance systems,a real-time 5/3 lifting wavelet HD-video de-noising system is proposed with frame rate conversion(FRC) based on a field-programmable gate array(FPGA),which uses a 3-level pipeline paralleled 5/3 lifting wavelet transformation and reconstruction structure,as well as a fast BayesS hrink adaptive threshold filtering module.The proposed system demonstrates de-noising performance,while also balancing system resources and achieving real-time processing.The experiments show that the proposed system's maximum operating frequency(through logic synthesis and layout using Quartus 13.1 software) can reach 178 MHz,based on the Altera Company's Stratix III EP3SE80 series FPGA.The proposed system can also satisfy real-time de-noising requirements of 1920 × 1080 at60 fps HD-video sources,while also significantly improving the peak signal to noise rate of the denoising images.Compared with similar systems,the system has the advantages of high operating frequency,and the ability to support multiple source formats for real-time processing. 展开更多
关键词 video surveillance threshold filtering discrete wavelet transformation DWT) field-programmable gate array (FPGA) DE-NOISING
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Visual Tracking System for Welding Seams
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作者 赵增顺 王继贞 程学珍 《Journal of Measurement Science and Instrumentation》 CAS 2010年第3期242-246,共5页
To track the narrow butt welding seams in container manufacture, a visual tracking system based on smart camera is proposed in this paper. A smart camera is used as the sensor to detect the welding seam. The feature e... To track the narrow butt welding seams in container manufacture, a visual tracking system based on smart camera is proposed in this paper. A smart camera is used as the sensor to detect the welding seam. The feature extraction algorithm is designed with the consideration of the characteristics of the smart caraera, which is used to compute the error between the welding torch and the welding seam. Visual control system based on image is preseated, which employs a programmable controller to control a stepper motor to eliminate the tracking error detected by the smart camera. Experiments are conducted to demonstrate the effectiveness of the vision system. 展开更多
关键词 visual tracking smart camera Welding Seams tracking error
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