顾及变形特点的遥感影像分块纠正技术

发布时间：2018-01-16 02:23

本文关键词：顾及变形特点的遥感影像分块纠正技术　出处：《西安科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：几何纠正是遥感影像用于防灾减灾救灾、实时动态监测等诸多应用的关键处理环节;同时也是整个遥感图像处理过程中耗时最长、计算最密集的步骤之一。本文在对遥感数字影像的性质和特点、成像模型、坐标系统等做了详细的介绍的基础上,对几何畸变因素、遥感影像几何纠正模型、地面控制点采集方法和几何纠正精度分析做了深入的研究。遥感传感器在接收不同地形类型信息时受到的不同因素的影响不同,地形起伏的变化对遥感影像的精度有很大的影响。遥感影像的几何纠正是遥感影像数据处理的重要环节,所以在影像几何纠正时方法的选用很重要。通过对白银区影像进行相关实验,采用实验对比法,对影像分别使用不同的纠正方法进行整体几何纠正以及单元格网分块、重要点分块几何纠正,并对其实验结果影像进行了分析和总结。实验结果表明进行重要点分块纠正后的影像的精度要高于使用整体纠正方法纠正的精度,而且几何纠正效率高于单元格网分块方法。使遥感影像在实际应用中能够提供更加准确的地理信息,提升其利用价值。本文在研究遥感影像纠正的基础上,提出了按地理特点提取遥感影像重要点构建三角网,将遥感影像分区后再进行纠正的方法。得出将遥感影像图按不同地形、地物区域分块,并根据不同区域的情况选择合适的纠正模型进行几何纠正,分块纠正精度高于整体纠正,实现了遥感影像高精度几何校正。
[Abstract]:Geometric correction of remote sensing is used for disaster prevention and disaster relief, the key process of real-time dynamic monitoring and many other applications; it is also the whole remote sensing image processing is the longest and one of the most intensive calculation steps. In this paper the properties and characteristics of remote sensing digital image imaging model, coordinate system makes a detailed introduction of the foundation on the geometric distortion factors, remote sensing image geometric correction model, ground control point method and geometric correction accuracy analysis is deeply researched. Remote sensing sensors in different terrain types by receiving information to the different factors are different, have great influence on accuracy of the terrain changes of remote sensing image geometric correction of remote sensing. Image is an important part of the remote sensing image data processing, so the selection method in image geometric correction is very important. Based on the image to carry on the related Baiyin District The experiment, the experimental comparison of different methods were used to correct the image geometric correction and the overall grid block, an important point of block geometric correction, image and the experimental results were analyzed and summarized. The experimental results show that the important point of block corrected image is more accurate than the overall correct use of corrective the precision of the method, and the geometric correction efficiency is higher than the block method of grid. The remote sensing images can provide more accurate geographic information in the actual application, improve its utilization value. Based on the study of remote sensing image correction based on the proposed according to geographical features extraction from remote sensing images of important points of the triangle network, the remote sensing image partition after the method of correction. The remote sensing images according to different terrain, terrain region, and according to the different area to select the correct model suitable for Geometric correction, the accuracy of block correction is higher than the whole correction, and the high precision geometric correction of remote sensing image is realized.

【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P237

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