针对航空交错延时积分(Time delay and integration,TDI)红外影像奇数行和偶数行之间灰度差异、错动以及影像降晰问题,提出了一种交错TDI红外影像复原方法.首先采用对影像灰度差异不敏感的基于相位相关(Phase-only correlation,POC)的...针对航空交错延时积分(Time delay and integration,TDI)红外影像奇数行和偶数行之间灰度差异、错动以及影像降晰问题,提出了一种交错TDI红外影像复原方法.首先采用对影像灰度差异不敏感的基于相位相关(Phase-only correlation,POC)的位移估计方法估计奇数行影像和偶数行影像之间的亚像素精度位移场.其次以奇数行影像为参考,根据位移估计结果对偶数行影像做点对点灰度校正,并对齐奇数行影像和灰度校正后的偶数行影像.最后采用BTV(Bilateral total variation)正则化超分辨率重建方法反降晰,得到复原影像.实验结果表明复原影像中奇偶行的错动得到有效补偿,地物的边缘和纹理结构更加清晰,影像质量显著提高.展开更多
A lensless Vanderlugt optical correlator using two phase-only spatial light modulators （SLMs） is proposed. The SLMs are used for displaying input and filter patterns respectively. The SLMs are also used as programma...A lensless Vanderlugt optical correlator using two phase-only spatial light modulators （SLMs） is proposed. The SLMs are used for displaying input and filter patterns respectively. The SLMs are also used as programmable lenses in order to realize the lensless construction. This lensless system is simple and its alignment adjustment is easy. The performance of the SLMs as programmable lenses is also described.展开更多
Pattern recognition with a circular harmonic filter (CHF) can have both the shift and rotation invariancet but it suffers lower signal noise ratio (SNR) as compared with a matched spatial filter (MSF). In order to imp...Pattern recognition with a circular harmonic filter (CHF) can have both the shift and rotation invariancet but it suffers lower signal noise ratio (SNR) as compared with a matched spatial filter (MSF). In order to improve the SNR of CHF, here a new filter, phase-only circular harmonic filter (POCHF) is presented and the reason why POCHF can improve the SNR of correlation peak by the point展开更多
This paper introduces infrastructure-to-vehicle and vehicle-to-vehicle communications using VLC.A VLC coupled with a high-speed image sensor is introduced(i.e.,image sensor communication).The high-speed image sensors ...This paper introduces infrastructure-to-vehicle and vehicle-to-vehicle communications using VLC.A VLC coupled with a high-speed image sensor is introduced(i.e.,image sensor communication).The high-speed image sensors provide eyes for autonomous and connected vehicles.VLC imparts data reception capability to image sensors with necessary functions,which can then be provided to autonomous and connected vehicles.In this paper,some of our research on coupling VLC to high-speed image sensors is introduced,including our key findings:the basics of ISC,a vehicle motion model,and range estimation.展开更多
文摘针对航空交错延时积分(Time delay and integration,TDI)红外影像奇数行和偶数行之间灰度差异、错动以及影像降晰问题,提出了一种交错TDI红外影像复原方法.首先采用对影像灰度差异不敏感的基于相位相关(Phase-only correlation,POC)的位移估计方法估计奇数行影像和偶数行影像之间的亚像素精度位移场.其次以奇数行影像为参考,根据位移估计结果对偶数行影像做点对点灰度校正,并对齐奇数行影像和灰度校正后的偶数行影像.最后采用BTV(Bilateral total variation)正则化超分辨率重建方法反降晰,得到复原影像.实验结果表明复原影像中奇偶行的错动得到有效补偿,地物的边缘和纹理结构更加清晰,影像质量显著提高.
文摘A lensless Vanderlugt optical correlator using two phase-only spatial light modulators （SLMs） is proposed. The SLMs are used for displaying input and filter patterns respectively. The SLMs are also used as programmable lenses in order to realize the lensless construction. This lensless system is simple and its alignment adjustment is easy. The performance of the SLMs as programmable lenses is also described.
文摘Pattern recognition with a circular harmonic filter (CHF) can have both the shift and rotation invariancet but it suffers lower signal noise ratio (SNR) as compared with a matched spatial filter (MSF). In order to improve the SNR of CHF, here a new filter, phase-only circular harmonic filter (POCHF) is presented and the reason why POCHF can improve the SNR of correlation peak by the point
基金supported in part by Japan Society for the Promotion of Science(JSPS)KAKENHI(No.16H04364).
文摘This paper introduces infrastructure-to-vehicle and vehicle-to-vehicle communications using VLC.A VLC coupled with a high-speed image sensor is introduced(i.e.,image sensor communication).The high-speed image sensors provide eyes for autonomous and connected vehicles.VLC imparts data reception capability to image sensors with necessary functions,which can then be provided to autonomous and connected vehicles.In this paper,some of our research on coupling VLC to high-speed image sensors is introduced,including our key findings:the basics of ISC,a vehicle motion model,and range estimation.
