本文主要随机选取三类地物地貌类型共十五块实验区域。利用SOCET SET 5.4软件中的不同匹配策略来自动提取实验区域DSM产品,并分析在不同地物地貌类型下的匹配效果。通过目视观察和误差分析得出不同匹配策略和地物地貌类型对自动提取DSM...本文主要随机选取三类地物地貌类型共十五块实验区域。利用SOCET SET 5.4软件中的不同匹配策略来自动提取实验区域DSM产品,并分析在不同地物地貌类型下的匹配效果。通过目视观察和误差分析得出不同匹配策略和地物地貌类型对自动提取DSM的影响,并总结出针对不同地物地貌类型如何选择匹配策略的规律,以归纳基于匹配策略高质量和高效率自动提取DSM产品的方法,为在以后的生产中即较好较快的完成任务又减少人工干预提供依据。展开更多
Segmentation and edge regulation are studied deeply to extract buildings fromDSM data produced in this paper. Building segmentation is the first step to extract buildings, anda new segmentation method-adaptive iterati...Segmentation and edge regulation are studied deeply to extract buildings fromDSM data produced in this paper. Building segmentation is the first step to extract buildings, anda new segmentation method-adaptive iterative segmentation considering rati-o mean square-is proposedto extract the contour of buildings effectively. A sub-image (such as 50X50 pixels) of the image isprocessed in sequence, the average gray level and its ratio mean square are calculated first, thenthreshold of the sub-image is selected by using iterative threshold segmentation. The current pixelis segmented according to the threshold, the average gray level and the ratio mean square of thesub-image. The edge points of the building are grouped according to the azimuth of neighbor points,and then the optimal azimuth of the points that belong to the same group can be calculated by usingline interpolation.展开更多
针对传统数字真正射影像(True Digital Orthophoto Map,TDOM)生产存在处理流程复杂、效率低、质量差、精度低的问题,基于无人机航空倾斜摄影测量的影像数据,通过INPHO全数字航空遥感摄影测量软件,制定了从空三加密处理、到高精度数字表...针对传统数字真正射影像(True Digital Orthophoto Map,TDOM)生产存在处理流程复杂、效率低、质量差、精度低的问题,基于无人机航空倾斜摄影测量的影像数据,通过INPHO全数字航空遥感摄影测量软件,制定了从空三加密处理、到高精度数字表面模型(Digital Surface Model,DSM)创建,再到数字真正射影像成果生成的全新真正射影像生产流程。通过实际项目数据验证可知,此方法所生产的数字真正射影像精度高、质量好,且较传统方法流程简单、高自动化处理、效率高,为数字真正射影像生产提供了有效的应用方案。展开更多
文摘本文主要随机选取三类地物地貌类型共十五块实验区域。利用SOCET SET 5.4软件中的不同匹配策略来自动提取实验区域DSM产品,并分析在不同地物地貌类型下的匹配效果。通过目视观察和误差分析得出不同匹配策略和地物地貌类型对自动提取DSM的影响,并总结出针对不同地物地貌类型如何选择匹配策略的规律,以归纳基于匹配策略高质量和高效率自动提取DSM产品的方法,为在以后的生产中即较好较快的完成任务又减少人工干预提供依据。
基金theNationalNaturalScienceFoundationofChina (No 40 2 0 1 0 35)
文摘Segmentation and edge regulation are studied deeply to extract buildings fromDSM data produced in this paper. Building segmentation is the first step to extract buildings, anda new segmentation method-adaptive iterative segmentation considering rati-o mean square-is proposedto extract the contour of buildings effectively. A sub-image (such as 50X50 pixels) of the image isprocessed in sequence, the average gray level and its ratio mean square are calculated first, thenthreshold of the sub-image is selected by using iterative threshold segmentation. The current pixelis segmented according to the threshold, the average gray level and the ratio mean square of thesub-image. The edge points of the building are grouped according to the azimuth of neighbor points,and then the optimal azimuth of the points that belong to the same group can be calculated by usingline interpolation.
