搜索结果: 1-14 共查到“信息与通信工程 DEM”相关记录14条 . 查询时间(0.218 秒)
Optical and radar data fusion for DEM generation
DEM generation SAR Interferometry Phase Unwrapping SPOT Stereoscopy Data Fusion
2016/5/20
This paper presents a DEM generation procedure based on optical (SPOT stereo) and radar (InSAR, interferometric SAR) data. The first part of the paper is focused on InSAR. The second one is concerned ...
System calibration, geometric accuracy testing and validation of DEM & orthoimage data extracted from SPOT stereo pairs using commercially available image processing systems
System calibration geometric accuracy testing DEM orthoimage data extracted SPOT stereo pairs
2016/5/20
The paper describes the comprehensive testing of the digital photogrammetric modules forming parts of the image processing systems available from a number of remote sensing system suppliers - PCI, ERD...
LIDAR Data Reduction for Efficient and High Quality DEM Generation
LiDAR Laser Scanning DEM Interpolation Catchment Data Reduction
2015/12/8
Airborne Light Detection and Ranging (LiDAR) - also referred to as Airborne Laser Scanning (ALS), provides means for high density and high accuracy topographic data acquisition. LiDAR data have become...
A Flow to Generate DEM and Segment Buildingin in Urban Areas from LIDAR Data
Lidar Fusion filter Digital elevation model Connected component labelling Mathematical morphology
2015/12/8
Based on the character of Lidar data，this paper presents a fusion arithmetic to abstract DEM，and presents a flow to get building data from the object data. Firstly, this paper preprocesses the range i...
An Evaluation on the Data Quality of Srtm DEM at the Alpine and Plateau area, North-Western of China
DEM Shuttle Radar Topographic Mission (SRTM) evaluation Inferometric SAR (InSAR) land cover
2015/11/23
This paper evaluates the quality of SRTM3 data for alpine and plateau areas in Northwestern (NW) China against DEM data extracted from topographic maps. These SRTM data were obtained from both the ESR...
A HADOOP-BASED ALGORITHM OF GENERATING DEM GRID FROM POINT CLOUD DATA
Hadoop LiDAR Digital Elevation Model
2015/5/7
Airborne LiDAR technology has proven to be the most powerful tools to obtain high-density, high-accuracy and significantly detailed surface information of terrain and surface objects within a short ...
AN INTEGRATED APPROACH TO ACCURATE DEM GENERARTION USING AIRBOREN FULL WAVEFORM LIDAR DATA
Remote Sensing full waveform LiDAR DEM generation Morphology integration
2014/6/5
In this study, full waveform LiDAR data were exploited to improve the generation of a large-scale digital elevation model (DEM). Building on the methods of progressive generation of triangulation irre...
HIGH-PRECISION DEM PRODUCTION FOR SPACEBORNE STEREO SAR IMAGES BASED ON SIFT MATCHING AND REGION-BASED LEAST SQUARES MATCHING
Matching Stereo DEM Radargrammetric Applycation strategy
2014/4/25
Generally, there are two ways to generate Digital Elevation Model (DEM) using synthetic aperture radar (SAR) data, which are Interferometer Synthetic Aperture Radar(InSAR) and radargrammetry. Consider...
针对机载气象雷达气象模式地杂波抑制问题，提出利用回波幅度信息的基于数字高程模型（DEM，Digital Elevation Model）的时域地杂波剔除方法。首先利用回波幅度信息对存在雷达回波信号的数据区域进行分割，然后对区域的边界距离单元利用基于DEM的可视性算法分析其触地情况。根据分析结果可知，存在回波信号的区域可分成仅含气象的区域、仅含杂波的区域以及二者相连的区域，其中相连区域还需进行逐距离...
基于干涉合成孔径雷达(Interferometric SAR, InSAR)技术生成高精度数字高程模型(Digital Elevation Model, DEM)，需要进行干涉定标。繁重的地面控制点(Ground Control Points, GCPs)布放不利于InSAR大区域地形测绘的自动化。该文介绍一种稀疏GCPs下，基于自动提取的连接点(Tie Points, TPs)，利用最小二乘平差...
一种改进的基于DEM的机载重轨干涉SAR运动补偿算法
干涉SAR 机载重轨干涉测量 运动补偿
2009/8/28
该文研究了基于DEM(Digital Elevation Model)的高精度重轨干涉SAR运动补偿算法。分析了平地假设及波束中心近似造成的残余运动误差的影响，表明对重轨干涉SAR系统进行基于DEM的高精度运动补偿的必要性。分析了对外部DEM数据精度要求，指出利用低精度DEM数据进行精确运动补偿获取高精度DEM数据的可行性。针对现有基于DEM运动补偿算法的不足提出改进算法。该算法根据载机轨迹偏移和...
星载SAR干涉技术获取DEM及其精度分析
合成孔径雷达干涉测量 数字高程模型 精度分析
2009/7/9
星载合成孔径雷达干涉（InSAR）技术是一种数据覆盖范围广、廉价、高效、方便的数字高程模型（DEM）获取方法，但在地面植被覆盖广、大气水汽含量高的地区其影像相干性随时间基线的增加迅速降低；同时，SAR卫星的轨道误差也影响DEM精度。利用ERS-1/2卫星串行模式SAR数据获取镇江地区DEM，分析了轨道误差对DEM精度的影响；根据干涉相位的统计特性，从理论上给出干涉相位噪声与相干系数和视数之间的关系...
星载InSAR系统DEM重建及其误差分析
干涉合成孔径雷达 重建 基线误差
2009/4/17
对于星载干涉合成孔径雷达(InSAR)系统数据处理中的数字高程模型(DEM)重建,其误差受基线误差等误差源及是否采用地面控制点(GCP)影响。该文基于传统重建方法得出了利用GCP时的DEM重建方法,并分析了重建误差关于基线误差的传递关系。由此传递关系,可知系统对轨道测量精度的要求很高,而利用GCP时,相同轨道测量精度条件下,重建误差大大减小。故为了在保持重建精度的情况下降低对轨道测量精度的要求,可...