【摘 要】
：
为实现低对比度、复杂背景下隐蔽目标的探测,搭建了双液晶相位可变延迟器(LCVR)的分时全偏振成像系统,提出了基于最小2-范数条件数的系统中2个LCVR相位延迟量控制的最优化组合方案。为探测隐蔽目标的真实偏振状态,在该组合方案设置下标定得到了系统仪器矩阵,并对隐藏于树阴下的绿色涂层目标进行了野外成像实验。实验结果表明,普通强度图像中目标与背景的对比度几乎为零,而经反演得到的S0图像中目标与背景对比度
论文部分内容阅读
为实现低对比度、复杂背景下隐蔽目标的探测,搭建了双液晶相位可变延迟器(LCVR)的分时全偏振成像系统,提出了基于最小2-范数条件数的系统中2个LCVR相位延迟量控制的最优化组合方案。为探测隐蔽目标的真实偏振状态,在该组合方案设置下标定得到了系统仪器矩阵,并对隐藏于树阴下的绿色涂层目标进行了野外成像实验。实验结果表明,普通强度图像中目标与背景的对比度几乎为零,而经反演得到的S0图像中目标与背景对比度为0.2525,结果进一步证明,该分时偏振成像系统可以有效地实现复杂背景下低对比度目标的探测。
其他文献
The integration of surface normals for the purpose of computing the shape of a surface in 3D space is a classic problem in computer vision. However,even nowadays it is still a challenging task to devi
In this Special Issue,a focus is placed on the role of the itdxylem as an essential conduit for the long-distance Edelivery of water and mineral nutrients from the soil to the vegetative(above-ground)
Herein we review the current state-of-the-art of plant hydraulics in the context of plant physiology,ecology, and evolution, focusing on current and future research opportunities. We explain the physi
Metabolite transport processes and primary metabolism are highly interconnected. This study examined the importance of source-to-sink nitrogen partitioning, and associated nitrogen metabolism for carb
In order to prevent or counteract shading,plants enact a complex set of growth and developmental adaptations when they sense a change in light quality caused by other plants in their vicinity.This sha
Salt stress is a major environmental factor that inhibits crop growth.Trichoderma spp.are the most efficient biocontrol fungi and some of the strains can stimulate plant growth.Phosphate solubilizatio
为探讨水杨酸(SA)对不同增殖方式来源的浒苔生长和生理特性的影响,本文选取营养繁殖得到的浒苔(VU)和孢子/配子繁殖得到的浒苔(SU)作为供试材料,设置不同的水杨酸浓度,测定两种浒苔的生长、叶绿素荧光、超氧化物歧化酶(SOD)和可溶性蛋白含量等生理指标.结果表明:低浓度水杨酸可以促进VU和SU的生长,对VU促进效果更为显著;在0.2μg·mL~(-1)水杨酸浓度下,VU相对生长速率达到最大值21.
工业"三废"的无节制排放、污水灌溉以及农药化肥等的不合理使用导致土壤重金属含量急剧增加,耕地重金属污染日益严重。研究表明,气体信号分子硫化氢(hydrogen sulfide,H_2S)能够抑制重金属的吸收和转运,减少重金属离子在植物地上部分的积累,提高植物对重金属胁迫的抗性。该文综述了H_2S在植物抵御重金属胁迫过程中参与调控的生理过程及其作用的信号机制,为培育高产安全的作物品种提供一些新思路,
Hyperthermia has proven to be beneficial to treating superficial malignancies, particularly chest wall recurrences of breast cancer. During hyperthermia, monitoring the time–temperature profiles in th
In-line phase-contrast computed tomography(IL-PC-CT) imaging is a new physical and biochemical imaging method.IL-PC-CT has advantages compared to absorption CT when imaging soft tissues. In practical