International Symposium on Lidar and Radar Mapping Technologies最新文献_第3页

Weighted total least squares for rigid body transformation and comparative study on heteroscedastic points 刚体变换的加权总最小二乘及异方差点的比较研究

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912746

Yongjun Zhou, Caihua Deng, Jianjun Zhu

引用次数: 0

Deformation analysis on Zhongba (Tibet) earthquakes as constrained by InSAR measurement InSAR测量约束下西藏中坝地震形变分析

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912447

Xiaochun Shi, Zhibiao Du, C. Wang, Chenggang Li

引用次数: 0

Calibration of full-waveform lidar data by range between sensor and target and its impact for landscape classification 基于传感器与目标距离的全波形激光雷达数据校准及其对景观分类的影响

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912741

Guangcai Xu, Y. Pang, Zeng-yuan Li

{"title":"Calibration of full-waveform lidar data by range between sensor and target and its impact for landscape classification","authors":"Guangcai Xu, Y. Pang, Zeng-yuan Li","doi":"10.1117/12.912741","DOIUrl":"https://doi.org/10.1117/12.912741","url":null,"abstract":"Full-waveform LIDAR systems have already been proved to have large potentialities in characterizing the landscape. Especially in the forestry area, more detail information is provided by waveform data processing and new opportunities are inspired for point cloud classification from waveform characteristics. Generally, different objects response to the emitted pulse diversely, which is incarnated in the waveform data. But acquired data is influenced by several factors, so it cannot be directly used in wide area before calibration. Within one flight, some factors such as laser scanner systems, atmosphere conditions, etc. can be considered as constant. Therefore, range between sensor and object could be regarded as one of the most important factor and was introduced to calibrate Gaussian decomposition results of waveform data. Meanwhile, the number of return echoes was also considered in calibration process. After these improvements, the parameters including Gaussian amplitude, standard deviation and energy extracted from waveform data by Gaussian decomposition method were applied for test area classification. A supervised classifier was implemented to distinguish building, grass, conifer and broadleaf. Then the accuracy of the classification results of calibrated and non-calibrated was analyzed, which indicates that the calibrated full-waveform data possibly increase the potential application in landscape identification.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126409688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

InSAR interferogram filtering methods in the contourlet domain InSAR干涉图的轮廓波域滤波方法

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912331

C. Zhu, H. Fan, K. Deng, Jiqun Xue

{"title":"InSAR interferogram filtering methods in the contourlet domain","authors":"C. Zhu, H. Fan, K. Deng, Jiqun Xue","doi":"10.1117/12.912331","DOIUrl":"https://doi.org/10.1117/12.912331","url":null,"abstract":"The interferogram contains much noise which reduce the precision when phase unwrapping. In this paper, we filter the interferogram in the contourlet domain. The contourlet transform (CT) has flexible aspect ratios and can effectively capture geometry information of interferogram edges. However, the CT is lack of the feature of translation invariance. Hereby we study the cycle-spinning CT (CSCT) to convert the commonly CT to translation invariance. Firstly, we translate the original interferogram before being decomposed. Secondly, we decompose the translated interferogram using the CT, and modify the coefficients. Finally, we reconstructed the interferogram with the modified coefficients and translate back. In the experimentation, the data is selected both from the plain and mountain area. The results show that the CSCT outperform the discrete wavelet transform (DWT), the CT in terms of the residues number and the mean value of the correlation coefficient. In texture retrieval, the CSCT shows improvements in performance for various oriented texture and the results indicate a better compromise between noise removal and the detail preservation. Besides, in the mountain area, the CSCT performed well than in the plain area because there is more texture in the mountain area.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127899938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of 3D laser scanning technology to a goldmine underground survey 三维激光扫描技术在某金矿地下测量中的应用

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912349

Lei Li, Jian Wang, Tingting Wang, Xiaogang Zhang

引用次数: 0

Determination of spherical target center from TLS data based on a method of nonlinear least squares 基于非线性最小二乘法的TLS数据球面目标中心确定

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912979

D. Yue, P. Guo

引用次数: 2

Feasibility analysis of the robust adaptive Kalman filtering model 鲁棒自适应卡尔曼滤波模型的可行性分析

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.913955

Zhang-yu Huang, Xi-qiang Chen

引用次数: 0

Comparison of lidar's characteristics at different flying height 不同飞行高度激光雷达特性比较

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912611

Qiong Ding, Wu Chen, B. King, Yanxiong Liu

引用次数: 1

Extraction of the vegetation fraction based on a stepwise spectral mixture analysis for the central and eastern area of source region of Yangtze, Yellow and Lantsang Rivers 基于分步混合光谱分析的长江、黄河、澜沧江源区中东部植被覆盖度提取

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912343

Xiaoxue Li, R. An, Chunmei Qu, Renmin Yang, Tianyu Gong, Hong Wu, L. Lu, Yingying Liu, X. Liang

{"title":"Extraction of the vegetation fraction based on a stepwise spectral mixture analysis for the central and eastern area of source region of Yangtze, Yellow and Lantsang Rivers","authors":"Xiaoxue Li, R. An, Chunmei Qu, Renmin Yang, Tianyu Gong, Hong Wu, L. Lu, Yingying Liu, X. Liang","doi":"10.1117/12.912343","DOIUrl":"https://doi.org/10.1117/12.912343","url":null,"abstract":"Vegetation cover is an important parameter used in monitoring ecological changes of the source region of Yangtze, Yellow and Lantsang Rivers and understanding human activities. Thus, how to extract the large area's vegetation fraction quickly effectively is an open question. The traditional linear spectral mixture analysis (LSMA) assumes that the spectral reflectance is a mixture of several fixed endmember spectral values, which ignores considerable within-class variability. However, multiple endmember spectral mixture analysis (MESMA) overcomes the disadvantage by allowing the number and types to vary on a per-pixel basis. This paper proposes a stepwise spectral mixture analysis (SSMA) containing two steps of MESMA and adding the endmember fraction rationality rule in each step. The aim of the first step is to detect the pixels that didn't contain vegetation information at all and these pixels would be masked out. In the second step, MESMA is used to unmix the pixels only reserved in previous process. The results show that SSMA is more accurate than LSMA in extracting the vegetation fraction for the Three-Rivers. This means that SSMA is a good substitute for LSMA in studies on ecological changes. The concept of SSMA also can be applied for other large study areas.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128808791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A model based approach to intensity normalization for terrestrial laser scanners 基于模型的地面激光扫描仪强度归一化方法

International Symposium on Lidar and Radar Mapping Technologies Pub Date : 2011-06-12 DOI: 10.1117/12.912591

A. Errington, B. Daku, A. Prugger

{"title":"A model based approach to intensity normalization for terrestrial laser scanners","authors":"A. Errington, B. Daku, A. Prugger","doi":"10.1117/12.912591","DOIUrl":"https://doi.org/10.1117/12.912591","url":null,"abstract":"Terrestrial Laser Scanners (TLS) measure distances and record angles to objects in the surrounding environment. In addition, a TLS also measures the amount of reflected light (intensity). The intensity value provided by the TLS is a function of the distance to the object, angle of incidence, the object's reflectance properties and internal parameters of the laser scanner. In some cases it is possible to obtain the reflectance properties of an object from the intensity value, distance and angle of incidence. The object reflectance provides information that can be used to improve the speed and accuracy in segmentation or registration algorithms. In order to model the relationship between intensity and reflectance it is necessary to calibrate the model for the specific laser scanner using reflectance targets. These targets have surfaces calibrated to a specific reflectance value. The targets are expensive and it is a time consuming task to calibrate the model in this manner. Alternatively, this paper presents a method to determine the 'normalized intensity' using a similar model but without using the calibrated reflectance targets. Instead, overlapping registered scans are used to determine the model parameters. The normalized intensity can be used in the same way that object reflectance is used in segmentation and registration algorithms. The only difference is that it is not a true reflectance value. The scans used to test the method were taken with a 3DLS-K2 TLS. It is shown that using this method produces normalized intensity values that are independent of distance, instead providing a value related to the actual object's reflectance.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123766302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8