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基于公钥具有双向影子图像验证功能且无像素扩张的图像秘密分享 Research Article
Xuehu Yan, Longlong Li, Jia Chen, Lei Sun
《信息与电子工程前沿(英文)》 2023年 第24卷 第1期 页码 88-103 doi: 10.1631/FITEE.2200118
王华亭, 冯俊文, 苗成林, 王健
《中国工程科学》 2008年 第10卷 第8期 页码 51-55
能力集扩张(competence set expansion)是在决策过程中,决策者将已获得的能力集(competence set)拓展到解决问题所需能力集的过程分析了能力集以及能力集扩张的概念,从确定型与不确定性、多目标决策、动态能力集等方面提出了能力集扩张的研究方法。
MPIN:基于宏像素聚合的光场图像超分辨率网络 Research Articles
王歆雅1,马佳义1,高文静1,江俊君2
《信息与电子工程前沿(英文)》 2021年 第22卷 第10期 页码 1299-1310 doi: 10.1631/FITEE.2000566
关键词: 光场;超分辨率;宏像素表示
优化光学亚像素定位精度极限——揭示小PSF的像素相位效应 Article
战海洋, 邢飞, 宝竞宇, 孙婷, 陈真真, 尤政, 袁利
《工程(英文)》 2023年 第27卷 第8期 页码 140-149 doi: 10.1016/j.eng.2023.03.009
Subpixel localization techniques for estimating the positions of point-like images captured by pixelated image sensors have been widely used in diverse optical measurement fields. With unavoidable imaging noise, there is a precision limit when estimating the target positions on image sensors, which depends on the detected photon count, noise, point spread function (PSF) radius, and PSF’s intra-pixel position. Previous studies have clearly reported the effects of the first three parameters on the precision limit but have neglected the intra-pixel position information. Here, we develop a localization precision limit analysis framework for revealing the effect of the intra-pixel position of small PSFs. To accurately estimate the precision limit in practical applications, we provide effective PSF (ePSF) modeling approaches and apply the Cramér-Rao lower bound. Based on the characteristics of small PSFs, we first derive simplified equations for finding the best precision limit and the best intra-pixel region for an arbitrary small PSF; we then verify these equations on real PSFs. Next, we use the typical Gaussian PSF to perform a further analysis and find that the final optimum of the precision limit is achieved at the pixel boundaries when the Gaussian radius is as small as possible, indicating that the optimum is ultimately limited by light diffraction. Finally, we apply the maximum likelihood method. Its combination with ePSF modeling allows us to successfully reach the precision limit in experiments, making the above theoretical analysis effective. This work provides a new perspective on combining image sensor position control with PSF engineering to make full use of information theory, thereby paving the way for thoroughly understanding and achieving the final optimum of the precision limit in optical localization.
关键词: Optical measurement Subpixel localization Precision limit optimization Small point spread functions Centroiding Star sensors
高速单像素成像技术原理及应用 Review
Qiang GUO, Yu-xi WANG, Hong-wei CHEN, Ming-hua CHEN, Si-gang YANG, Shi-zhong XIE
《信息与电子工程前沿(英文)》 2017年 第18卷 第9期 页码 1261-1267 doi: 10.1631/FITEE.1601719
Jian-wen XU, Kaoru OTA, Mian-xiong DONG, An-feng LIU, Qiang LI
《信息与电子工程前沿(英文)》 2018年 第19卷 第12期 页码 1546-1557 doi: 10.1631/FITEE.1800519
一种用于交流永磁同步电机位置控制的带有扩展状态观测器的快速积分滑模控制器 Research Articles
姜俊峰1,2,周晓军1,2,赵维3,李伟3,张文东4
《信息与电子工程前沿(英文)》 2020年 第21卷 第8期 页码 1119-1266 doi: 10.1631/FITEE.1900298
标题 作者 时间 类型 操作
高速单像素成像技术原理及应用
Qiang GUO, Yu-xi WANG, Hong-wei CHEN, Ming-hua CHEN, Si-gang YANG, Shi-zhong XIE
期刊论文