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Exploiting Satellite Focal Plane Geometry for automatic Extraction of Traffic Flow from single optical Satellite Imagery

机译:利用卫星焦平面几何结构从单光学卫星图像中自动提取交通流量

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摘要

The focal plane assembly of most pushbroom scanner satellites is built up in a way that different multispectral or multispectral and panchromatic bands are not all acquired exactly at the same time. This effect is due to offsets of some millimeters of the CCD-lines in the focal plane. Exploiting this special configuration allows the detection of objects moving during this small time span. In this\udpaper we present a method for automatic detection and extraction of moving objects – mainly traffic – from single very high resolution optical satellite imagery of different sensors. The sensors investigated are WorldView-2, RapidEye, Pl´eiades and also the new SkyBox satellites. Different sensors require different approaches for detecting moving objects. Since the objects are mapped on different positions only in different spectral bands also the change of spectral properties have to be taken into account. In case the main distance in the focal plane is between the multispectral and the panchromatic CCD-line like for Pl´eiades an approach for weighted integration to receive\udmostly identical images is investigated. Other approaches for RapidEye and WorldView-2 are also shown. From these intermediate bands difference images are calculated and a method for detecting the moving objects from these difference images is proposed. Based on these presented methods images from different sensors are processed and the results are assessed for detection quality – how\udmany moving objects can be detected, how many are missed – and accuracy – how accurate is the derived speed and size of the objects. Finally the results are discussed and an outlook for possible improvements towards operational processing is presented
机译:大多数推扫式扫描仪卫星的焦平面组件都是以不同的多光谱或多光谱以及全色波段不能完全同时获得的方式构建的。这种影响是由于焦平面中CCD线几毫米的偏移引起的。利用这种特殊的配置,可以检测出在此短时间内移动的对象。在本文中,我们介绍了一种从不同传感器的单个超高分辨率光学卫星图像中自动检测和提取运动对象(主要是交通)的方法。被调查的传感器是WorldView-2,RapidEye,Pl'eiades以及新的SkyBox卫星。不同的传感器需要不同的方法来检测运动物体。由于对象仅在不同的光谱带中映射到不同的位置,因此也必须考虑光谱特性的变化。如果焦平面上的主要距离在多光谱和全色CCD线之间(如Pléadees),则研究一种加权积分方法来接收\几乎相同的图像。还显示了RapidEye和WorldView-2的其他方法。从这些中间带计算出差分图像,并提出了一种从这些差分图像中检测运动物体的方法。基于这些提出的方法,将处理来自不同传感器的图像,并评估结果的检测质量-如何检测到\多个运动物体,遗漏了多少个物体-以及准确性-物体的导出速度和尺寸的准确性如何。最后,讨论了结果,并提出了可能改进操作流程的前景

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    Krauß, Thomas;

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  • 年度 2014
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  • 原文格式 PDF
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