针对传统视频监控蒙被子时无法进行呼吸判断的问题,提出一种改进的欧拉影像放大算法(Eulerian video magnification,EVM)进行呼吸检测,并结合运动历史图(Motion history image,MHI)和网格标记法来去除干扰影响.该算法核心是利用改进的EV...针对传统视频监控蒙被子时无法进行呼吸判断的问题,提出一种改进的欧拉影像放大算法(Eulerian video magnification,EVM)进行呼吸检测,并结合运动历史图(Motion history image,MHI)和网格标记法来去除干扰影响.该算法核心是利用改进的EVM获得有运动前景目标,利用MHI来检测图像中的大运动,并用网格标记法除去手、头等外部运动干扰.结果表明:该方法实现简单,实时性好,可以有效除去呼吸以外运动对正常呼吸的干扰.展开更多
This letter introduces color constancy and Retinex theory for image enhancement.It clas- sifies Retinex algorithms into four categories and provides their principles and implementations in general.The experimental res...This letter introduces color constancy and Retinex theory for image enhancement.It clas- sifies Retinex algorithms into four categories and provides their principles and implementations in general.The experimental results of Frankle-McCann,MSR (Multi-Scale Retinex) and PNSD (Pro- jected Normalized Steepest Descent) Retinex algorithms are presented and compared.Moreover, variance and average gradient are proposed to evaluate the performance of the different algorithms.展开更多
A various effective resist diffusion lengths methodology for OPC model calibration is proposed,which considers the discrepancy of effective resist diffusion lengths between 1D and 2D patterns. An important step of thi...A various effective resist diffusion lengths methodology for OPC model calibration is proposed,which considers the discrepancy of effective resist diffusion lengths between 1D and 2D patterns. An important step of this methodology is to set up a new calibration flow that lets 1D and 2D patterns have the same optical parameters but different effective diffusion lengths. Furthermore, a design for manufacturing （DFM） interaction is suggested in the calibration flow of the pro- posed model. From the CD errors of fitting results and the comparison between simulated contours and SEM images,it is found that the various effective resist diffusion lengths model calibration methodology results in a more accurate and stable model.展开更多
文摘针对传统视频监控蒙被子时无法进行呼吸判断的问题,提出一种改进的欧拉影像放大算法(Eulerian video magnification,EVM)进行呼吸检测,并结合运动历史图(Motion history image,MHI)和网格标记法来去除干扰影响.该算法核心是利用改进的EVM获得有运动前景目标,利用MHI来检测图像中的大运动,并用网格标记法除去手、头等外部运动干扰.结果表明:该方法实现简单,实时性好,可以有效除去呼吸以外运动对正常呼吸的干扰.
文摘This letter introduces color constancy and Retinex theory for image enhancement.It clas- sifies Retinex algorithms into four categories and provides their principles and implementations in general.The experimental results of Frankle-McCann,MSR (Multi-Scale Retinex) and PNSD (Pro- jected Normalized Steepest Descent) Retinex algorithms are presented and compared.Moreover, variance and average gradient are proposed to evaluate the performance of the different algorithms.
文摘A various effective resist diffusion lengths methodology for OPC model calibration is proposed,which considers the discrepancy of effective resist diffusion lengths between 1D and 2D patterns. An important step of this methodology is to set up a new calibration flow that lets 1D and 2D patterns have the same optical parameters but different effective diffusion lengths. Furthermore, a design for manufacturing （DFM） interaction is suggested in the calibration flow of the pro- posed model. From the CD errors of fitting results and the comparison between simulated contours and SEM images,it is found that the various effective resist diffusion lengths model calibration methodology results in a more accurate and stable model.
