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遥感技术与应用  2015, Vol. 30 Issue (5): 1006-1011    DOI: 10.11873/j.issn.1004-0323.2015.5.1006
图像与数据处理     
一种倾斜影像几何纠正的有效方法
吴佳奇,孙华生
(辽宁工程技术大学测绘与地理科学学院,辽宁 阜新 123000)
Efficient Method of Oblique Image Correction
Wu Jiaqi,Sun Huasheng
(School of Geomatics,Liaoning Technical University,Fuxin 123000,China)
 全文: PDF 
摘要:

针对航摄时拍摄角度倾斜于地面而产生的倾斜影像的几何畸变问题,提出了一种基于空间变换的倾斜影像纠正方法。首先根据坐标转换数学模型和新影像的采样间隔,确定出新影像的大小和原影像在新影像中的坐标域;然后在新影像中判断并统计出在坐标域内的像素点,构成坐标域点集;最后推导了转换模型的反变换,建立了关于原影像图像坐标的线性方程组并进行了改进整理,求解方程组的解并转换成像素坐标后,利用最近邻插值获取到坐标域各点的灰度值,以实现影像的纠正。通过Matlab进行了实验,对倾斜影像纠正效果良好,较一般算法相比耗时更少,该研究提出的算法可用于倾斜影像的配准、拼接和建模等处理。

关键词: 倾斜影像几何畸变空间变换倾斜影像纠正    
Abstract:

To solve the problem of geometric distortion caused by oblique aerial image,we presented an oblique image correction method based on the spatial transformation.First,the size of the new image and the new image coordinate system of the original image could be obtained according of the mathematical model of coordinate transformation and the sampling frequency of the new image,and then,collections of points were built in the new image coordinate system.Eventually,the inversion transformation model was derived and linear equations about the image coordinate of the original image were established.After solving the equations and transforming the solution into pixels,the digital values of the points were obtained with the nearest neighbour interpolation.Matlab was used in the study,it showed that the results of oblique image correction was good,and processing time was shorter than the traditional method.The method could be used to deal with the oblique image registering,mosaic and modeling.

Key words: Oblique image    Geometric distortion    Spatial transformation    Oblique image correction
收稿日期: 2014-04-18 出版日期: 2015-12-08
:  TP 391  
基金资助:

国家自然科学基金项目“遥感数据的空间分辨率和波段数对土地覆盖制图的影响研究”(41201454)。

通讯作者: 孙华生(1980-),男,山东莒南人,讲师,博士,主要从事摄影测量与遥感方面科研与教学工作。Email:sunhuasheng@126.com。   
作者简介: 吴佳奇(1985-),男,辽宁阜新人,博士研究生,主要从事倾斜影像数据处理与建模方面的研究。Email:wjq79713@163.com。
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引用本文:

吴佳奇,孙华生. 一种倾斜影像几何纠正的有效方法[J]. 遥感技术与应用, 2015, 30(5): 1006-1011.

Wu Jiaqi,Sun Huasheng. Efficient Method of Oblique Image Correction. Remote Sensing Technology and Application, 2015, 30(5): 1006-1011.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2015.5.1006        http://www.rsta.ac.cn/CN/Y2015/V30/I5/1006

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