Description: Automatic target detection in SAR image is the first stage in the ATR (Automatic Target Recognition) system. It is very important to improve the computing efficiency of the whole system. A conventional automatic target detection method is CFAR (constant false alarm rate) which is based only on the amplitude, discards the phase and thereby sacrifices half information of the SAR imagery. Almost each CFAR brings a large number of false alarms. 2L-IHP (two-look internal Hermitian product) is a new method which exploits the phase and amplitude information. In this paper, both CFAR and 2L-IHP algotithms are compared with an emphasis on 2L-IHP. The 2L-IHP algorithm for target detection is discussed briefly first. In order to apply it widely, it is modified to circumvent the constraint of the data. For polarimetric SAR images, PWF (Polarimetric Whitening Filter) is used to generate an image for target detection. According to ADTS data set, these algorithms are analyzed and evaluated respectively. C-、L- and P- band AIRSAR data are also processed, and some tentative conclusions are derived: Considering the penetrating ability of the microwave, L-band got the best detection accuracy of the three bands; HH polarization performed better for target detection than VV and HV polarization; Moreover, because more information is contained in polarimetric SAR data, here, we conclude that polarimetric SAR data have advantages over single polarized SAR data when they are applied for target detection. But all these conclusions need further validation. Platform: |
Size: 288371 |
Author:xbtown@126.com |
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Description: 针对现有的PCB（Printed Circuit Board）缺陷视觉检测系统实时性较差，难以检测线宽过窄等问题，首先对 PCB 缺陷图像进行小波变换压缩，提高了系统实时性；然后应用小波边缘检测算法对缺陷图像边缘精确定位，在图像小波变换局部模极大值对应的梯度方向上计算边缘点距离，根据特定规则提取、识别并定位特定缺陷，实验结果表明上述方法简单有效。-For the existing PCB (Printed Circuit Board) real-time visual inspection system for defects is poor, difficult to detect a narrow line width and other issues, first of all defects on the PCB image compression using wavelet transform and improve the system real time and then apply the wavelet edge detection algorithm precise location of the defect edge in the wavelet transform and local maxima correspond to the gradient direction of edge points to calculate the distance, according to a specific rule extraction, to identify and target specific defects, experimental results show that the method is simple and effective. Platform: |
Size: 134144 |
Author:李瑶 |
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Description: 一篇关于乳腺癌早期检测的微波热致成像技术的研究论文，博士论文定稿-An early detection of breast cancer caused by microwave thermal imaging technology, research papers, thesis final
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Size: 3155968 |
Author:小他 |
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Description: 一篇关于乳腺癌早期检测的微波热致成像技术的硬件系统研究论文-An early detection of breast cancer caused by microwave thermal imaging technology hardware research papers
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Size: 512000 |
Author:小他 |
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Description: 一篇关于乳腺癌早期检测的微波热致成像技术的硬件系统研究论文
-An early detection of breast cancer caused by microwave thermal imaging technology hardware research papers
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Size: 1234944 |
Author:小他 |
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Description: 该套计分系统是利用雷达微波探测原理确定弹着点的靶位，内容新颖，值得推荐，值得下载。-The scoring system is the use of microwave radar detection principle to determine the impact of target, content is novel, it is recommended, it is worth to download.
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Size: 601088 |
Author:小杨 |
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Description: The word Radar is the acronym of Radio detection and ranging. Radar is an active instrument, which measures the echo of scattering objects, surfaces and volumes illuminated by an electromagnetic wave internally generated belonging to the microwave portion of the electromagnetic spectrum. It was born just before the second world war for detecting and
ranging target for non-civilian scopes. In this case the requested spatial resolution was not so challenging for the technology available that time. The opening of new technological frontiers in the fifties, including the satellites and the space vehicles, demanded a better
spatial resolution for application in geosciences remote sensing (RS). Synthetic aperture radar (SAR) technique was invented to overcome resolution restrictions encountered in
radar observations from space and generally to improve the spatial resolution of radar images.-The word Radar is the acronym of Radio detection and ranging. Radar is an active instrument, which measures the echo of scattering objects, surfaces and volumes illuminated by an electromagnetic wave internally generated belonging to the microwave portion of the electromagnetic spectrum. It was born just before the second world war for detecting and
ranging target for non-civilian scopes. In this case the requested spatial resolution was not so challenging for the technology available that time. The opening of new technological frontiers in the fifties, including the satellites and the space vehicles, demanded a better
spatial resolution for application in geosciences remote sensing (RS). Synthetic aperture
radar (SAR) technique was invented to overcome resolution restrictions encountered inradar observations from space and generally to improve the spatial resolution of radar images. Platform: |
Size: 796672 |
Author:可难 |
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Description: 概述军用飞行目标对微波雷达的散色特性，讨论目标的高频散色机理，RCS分析方法及减缩途径，以及低RCS目标探测技术-Overview military flying targets scattered on color characteristics of microwave radar, discuss the target color high-frequency dispersion mechanism, RCS analysis and reduction pathways, and low RCS target detection technology Platform: |
Size: 342016 |
Author:李莉 |
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Description: 该微波干燥机是在Proteus仿真条件下，实现对干燥物料的温湿度检测和控制，以便于对物料的存储-The microwave drying machine is in the Proteus simulation conditions, the drying of materials to achieve detection and control of temperature and humidity in order to facilitate storage of materials Platform: |
Size: 115712 |
Author:李小 |
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Description: 红外视频检测，包扩多图像融合处理及图像增强技术，同是结合微波图像处理技术，使图像检测更真实。-Infrared video detection, including the expansion of multi-image fusion processing and image enhancement techniques, with a combination of microwave image processing technology to enable a more realistic image detection. Platform: |
Size: 7065600 |
Author:hui |
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Description: Microwave radar and microwave-induced thermoacoustics, recently proposed as promising breast cancer detection techniques, each have shortcomings that reduce detection performance. Making the assumption that the measurement noises experienced when applying these two techniques are independent, we propose a methodology to process the input signals jointly based on a hypothesis testing framework. We present two test statistics and derive their distributions to set the thresholds. The methodology is evaluated on numerically simulated signals acquired from 2-D numerical breast models using finite-difference time-domain method. Our results show that the proposed dual-modality approach can give a significant improvement in detection performance. Platform: |
Size: 9216 |
Author: |
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Description: 激光雷达是以发射激光束探测目标的位置、速度等特征量的雷达系统。从工作原理上讲，与微波雷达没有根本的区别：向目标发射探测信号(激光束),然后将接收到的从目标反射回来的信号(目标回波)与发射信号进行比较,作适当处理后,就可获得目标的有关信息,如目标距离、方位、高度、速度、姿态、甚至形状等参数,从而对飞机、导弹等目标进行探测、跟踪和识别。本程序为FMCW激光雷达matlab程序，包括调频非线性校正等。-Laser emitting a laser beam radar detection is the target position, velocity, volume and other characteristics of the radar system. From the working principle, and there is no fundamental difference between the microwave radar: transmitting to the target detection signal (laser beam), then the received signal reflected from the target (target echo) is compared with the transmitted signal, after appropriate treatment , you can get information about the target, such as the target distance, direction, altitude, speed, attitude, and even the shape and other parameters to the aircraft, missiles and other target detection, tracking and identification. This program is FMCW laser radar matlab procedures, including FM nonlinear correction. Platform: |
Size: 15360 |
Author:zhangbin |
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Description: 激光雷达是以发射激光束探测目标的位置、速度等特征量的雷达系统。从工作原理上讲，与微波雷达没有根本的区别：向目标发射探测信号(激光束),然后将接收到的从目标反射回来的信号(目标回波)与发射信号进行比较.本程序为FMCW激光雷达matlab程序，包括调频非线性校正等-Laser emitting a laser beam radar detection is the target position, velocity, volume and other characteristics of the radar system. From the working principle, and there is no fundamental difference between the microwave radar: transmitting to the target detection signal (laser beam), then the received signal reflected from the target (target echo) is compared with the transmitted signal, after appropriate treatment , you can get information about the target, such as the target distance, direction, altitude, speed, attitude, and even the shape and other parameters to the aircraft, missiles and other target detection, tracking and identification. This program is FMCW laser radar matlab procedures, including FM nonlinear correction. Platform: |
Size: 15360 |
Author:zhangbin |
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Description: 本文设计了一种基于无线传感器网络的人体探测’身份识别和定位系统$智能监控系统)系统由传统的红外感应’微波探
测和身份识别设备’定位系统共同组成-This paper designed a kind of human detection based on wireless sensor network identification and positioning system $intelligent monitoring system) system the traditional infrared induction microwave agent Measurement and identification devices positioning system Platform: |
Size: 244736 |
Author:熊伟 |
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Description:
室内环境的人体感应是物联网应用在安保、智能家居、节能环保方面的关键问题，近年来多普勒雷达体制的微波人体感应器作为一种高性能的室内人体传感器成为了一种热门的解决方案。微波人体感应器以雷达体制主动发射微波信号，探测回波中由目标人体产生的多普勒，输出触发信号。
国内外现有微波开关面临的主要问题是静止人体目标检测。本项目系统检测人体呼吸心跳微信息，拟通过长时间累积和滤波器提取微多普勒信息检测动目标。-
Of the indoor environment of the human body induction is the Internet of things application in security, smart home, energy-saving environmental protection, the key problem of doppler radar system in recent years as a kind of high performance microwave sensor body interior human body sensor has become a popular solution. Body of microwave sensor to active microwave signal launch radar system, the detection by the target echo in the bodies of doppler, trigger signal output.
Of the main problems in the domestic and foreign existing microwave switch target detection is still the human body. The project system to detect human breathing heartbeat micro information, through long time accumulation and filter extract micro-doppler information detection target.
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Size: 1024 |
Author:张洁 |
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Description: 遥感变化检测是指通过对不同时期同一区域的遥感图像进行比较分析，根据
图像之间的差异得到我们所需要的地物或目标的变化信息。现代遥感技术的飞速发展为变化检测提供了一种便捷的途径，遥感数据成为变化检测的主要数据源。 与可见光和红外遥感相比，微波遥感具有无可比拟的优点：微波能穿透云雾、雨雪，具有全天候、全天时的工作能力。二，微波对地物有一定穿透能力。三，采用侧视方式成像，覆盖面积大。正是这些优点，使得SAR 图像日益成为变化检测的重要数据源。
SAR 变化检测技术的需求日益广泛。目前，全球坏境变化加剧，城市急速发展，洪水、地震等自然灾害时有发生，这些都需要及时掌握相关动态信息，为相关决策部门提供支持，而SAR 的种种优点为快速响应提供了技术支持和应急保障。-Remote sensing change detection is through the same period of different regions of the same area of remote sensing images for comparative analysis, according to
The difference between the images gets the information of the changes in the objects or targets we need. The rapid development of modern remote sensing technology provides a convenient way for change detection, and remote sensing data become the main data source of change detection. Compared with visible and infrared remote sensing, microwave remote sensing has unparalleled advantages: microwave can penetrate the clouds, rain and snow, with all-weather, all day working ability. Second, the microwave has a certain ability to penetrate the ground. Third, the use of side view imaging, covering a large area. It is these advantages that make SAR images increasingly becoming important data sources for change detection. The following are the same as the
SAR change detection technology is becoming increasingly widespread. At presen Platform: |
Size: 366592 |
Author:陈鑫 |
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Search - microwave detection