基于ASRPCA和五帧差分融合的无人机检测研究

来源 :激光与光电子学进展 | 被引量 : 0次 | 上传用户:hzau1
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
无人机(UAV)的普及,给人们带来了极大的安全隐患。针对该问题,设计了一种基于主动子空间鲁棒主成分分析(ASRPCA)和五帧差分相融合的UAV视频检测算法。首先,采用交替迭代法结合增广拉格朗日乘子法对ASRPCA模型进行优化求解,获取视频序列当前帧的背景图像;其次,用背景图像替代五帧差分的中间帧;最后,中间帧分别与前两帧和后两帧进行差分二值化运算,使得UAV有较好的检测结果和去噪能力。实验结果表明,与全变分正则化RPCA(TVRPCA)算法相比,所提算法在不同背景下的召回率、准确率和综合性能的平均值
其他文献
Wedge waves (WWs) in wedges, including their dispersion characteristics and mode transformation, are investigated using the laser ultrasound technique. Pulsed laser excitation and optical deflection beam method for detection are used to record WWs. Numero
期刊
为了研究多次散射效果下红外辐射在雾中的传输衰减特性, 基于Mie散射理论, 计算了1.064 μm、3.8 μm和10.6 μm激光在平流雾和辐射雾中的消光参量和多粒子散射相位函数.利用Monte Carlo法建立了辐射传输模型, 分析了多次散射效应下接收屏、能见度和传输距离对透过率的影响, 并与Lambert-Beer定律计算结果进行了比较.结果表明: 当能见度和传输距离均为1 km时, 1.064 μm激光在平流雾中的接收屏粒子数随接收屏边长的增加而显著增加; 相同的能见度和传输距离下, 激光在辐射雾
针对高光谱图像数据维度高、特征非线性以及标签数据获取难度大的特点,结合堆栈稀疏自动编码网络,提出了一种基于非局部方式特征融合的二级分类算法。与传统堆栈稀疏自动编码网络相比,光谱角匹配算法将找到的与被分类像元最相似的光谱信息堆叠形成新的光谱信息,然后输入到SoftMax分类器中进行一级分类;将满足条件的像元添加到训练数据集,用于堆栈稀疏编码网络的分类训练;最后根据空间邻域信息对分类算法进行修正,使分
In this Letter, we propose the electronic manipulation of localized surface plasmon resonance for active tuning in near-field nanofocusing. We theoretically studied the excited graphene tuning of the nanofocusing field in few-layer graphene (FLG)-based hy
期刊
Creatinine level in urine is an important biomarker for renal function diseases, such as renal failure, glomerulonephritis, and chronic nephritis. The Au@MIL-101(Fe) was prepared by in situ growth of Au nanoparticles in MIL-101(Fe) as a selective SERS sub
A scheme for creating an arbitrary coherent superposition of two atomic states in serial multi-\Lambda-type system is proposed. This technique with the application of a control field is based on the existence of two degenerate dark states and their inter
以Ni80Cr20-Al-Si复合合金粉末为原料,在Ti6Al4V合金表面激光熔覆制备新型金属间化合物耐磨复合涂层。采用X射线衍射(XRD)、扫描电子显微镜(SEM)和能谱仪(EDS)表征了涂层的组织结构、硬度和摩擦学性能并分析了其相关机理。结果表明,涂层由硬质相Ti5Si3/Al3Ni2和基体Al3Ti/NiTi组成,与Ti6Al4V基体为良好的冶金结合,涂层的平均硬度约为Ti6Al4V合金(350 HV0.5)的2.5至3.0倍。其中涂层N2(质量分数为Ni80Cr20-40%Al-20%Si)具有较
Photoacoustic tomography (PAT) has the unique capability of visualizing optical absorption inside several centimeters-deep biological tissue with a high spatial resolution. However, single linear-array transducer-based PAT suffers from the limited-view ch