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基于数据挖掘的偏振光成像目标检测研究 被引量:1
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作者 张樊 王晶 《激光杂志》 CAS 北大核心 2023年第12期225-230,共6页
为提升偏正光图像目标识别技术水平,研究基于数据挖掘的偏振光成像目标检测方法。使用阈值分割法对偏振光图像实施分割预处理;使用斯托克斯参量、方差等方法获取偏振光图像的偏振态特征、目标边缘特征和直线特征;利用深度学习神经网络... 为提升偏正光图像目标识别技术水平,研究基于数据挖掘的偏振光成像目标检测方法。使用阈值分割法对偏振光图像实施分割预处理;使用斯托克斯参量、方差等方法获取偏振光图像的偏振态特征、目标边缘特征和直线特征;利用深度学习神经网络模型输出偏振光成像目标检测结果。实验结果表明:该方法可有效分割偏振光图像内的目标和背景,提取偏振信息能力较好;提取偏振光图像特征像素点的最低精度为0.98左右,提取其特征能力较强;特征信息提取效率较高,对于偏振光图像的特征信息提取最低耗时为0.257 s,应用性能较好。 展开更多
关键词 数据挖掘 光成像 目标检测 图像分割 偏振信息模型 深度学习
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A Study on The Multi-Antenna Geometrical Depolarization Channel Modeling 被引量:2
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作者 SUN Xuehong YANG Xiaoli +2 位作者 ZENG Zhimin ZHANG Cheng BAI Bing 《China Communications》 SCIE CSCD 2016年第3期105-114,共10页
The traditional geometrical depolarization model that single transmitter to single receiver provides a simple method of polarization channel modeling. It can obtain the geometrical depolarization effect of each path i... The traditional geometrical depolarization model that single transmitter to single receiver provides a simple method of polarization channel modeling. It can obtain the geometrical depolarization effect of each path if known the antenna configuration, the polarization field radiation pattern and the spatial distribution of scatters. With the development of communication technology, information transmission spectrum is more and more scarce. The original model provides only a single channel polarization state, so the information will be limited that the polarization state carries in the polarization modulation. The research is so significance that how to carries polarization modulation information by using multi-antenna polarization state. However, the present study shows that have no depolarization effect model for multi-antenna systems. In this paper, we propose a multi-antenna geometrical depolarization model. On the basis of a single antenna to calculate the depolarization effect of the model, and through simulation to analysis the main factors that influence the depolarization effect. This article provides a multi-antenna geometrical depolarization channel modeling that can applied to large-scale array antenna, and to some extent increase the speed of information transmission. 展开更多
关键词 large-scale array antenna multi-antenna channel modeling depolarization effect cross polarization discrimination
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