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高空间分辨率遥感影像的信息自动提取技术分析 被引量:1
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作者 翟辉琴 雷蓉 +1 位作者 董北平 张会彬 《测绘技术装备》 2008年第3期24-26,共3页
随着信息技术和传感器技术的飞速发展,卫星遥感影像分辨率有了很大提高,quickbird最高分辩率达到0.61m,ikonos为1m,spot-5为2.5m,遥感影像数据处理的重要性也日益显现。遥感影像数据处理的主要内容就是对遥感数据(主要是高分辨率遥感影... 随着信息技术和传感器技术的飞速发展,卫星遥感影像分辨率有了很大提高,quickbird最高分辩率达到0.61m,ikonos为1m,spot-5为2.5m,遥感影像数据处理的重要性也日益显现。遥感影像数据处理的主要内容就是对遥感数据(主要是高分辨率遥感影像数据)进行自动(半自动)图像处理分析,从而获取人们需要的信息。本文从遥感影像处理的最基本方法影像增强说起,经过影像分割,最后介绍了一些目标识别与提取的高级算法,基于知识发现、符号知识的逻辑推理等方法,说明了高分辨率卫星遥感影像对人为活动、对环境的影响成为可能。 展开更多
关键词 影像精处理 目标特征单元分割 识别与提取
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Analysis of Object Depth Effects on Accuracy of Dimensional Shape in X and Y Directions Using Single Non-metric Image
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作者 Tarek M.A. ZHU Qing 《Geo-Spatial Information Science》 2007年第4期269-275,共7页
In general, to reconstruct the accurate shape of buildings, we need at least one stereomodel (two photographs) for each building. In most cases, however, only a single non-metric photograph is available, which is us... In general, to reconstruct the accurate shape of buildings, we need at least one stereomodel (two photographs) for each building. In most cases, however, only a single non-metric photograph is available, which is usually obtained either by an amateur, such as a tourist, or from a newspaper or a post card. To evaluate the validity of 3D reconstruction from a single non-metric image, this study analyzes the effects of object depth on the accuracy of dimensional shape in X and Y directions using a single non-metric image by means of simulation technique, as this was considered to be, in most cases, a main source of data acquisition in recording and documenting buildings. 展开更多
关键词 SINGLE non-metric image reconstruction object depth ACCURACY dimensional shape
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