高分辨率光学遥感卫星反射点源像点提取方法

doi:10.11947/j.AGCS.2020.20190246

测绘学报 ›› 2020, Vol. 49 ›› Issue (10): 1295-1302.doi: 10.11947/j.AGCS.2020.20190246

高分辨率光学遥感卫星反射点源像点提取方法

徐伟伟^1,2, 张黎明^1,2, 李鑫^1,2, 杨宝云^1,2

1. 中国科学院安徽光学精密机械研究所, 安徽合肥 230031;
2. 中国科学院通用光学定标与表征技术重点实验室, 安徽合肥 230031

收稿日期:2019-07-02 修回日期:2020-02-29 发布日期:2020-10-31
作者简介:徐伟伟(1983-),男,博士,副研究员,研究方向为高分辨率光学遥感卫星辐射定标与像质评价等。E-mail:weilxu@aiofm.ac.cn
基金资助:
国家自然科学基金（41601388）

Pixel extraction of reflected point source image for high spatial resolution optical remote sensing satellite

XU Weiwei^1,2, ZHANG Liming^1,2, LI Xin^1,2, YANG Baoyun^1,2

1. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
2. Key Laboratory of Optical Calibration and Characterization of Chinese Academy of Sciences, Hefei 230031, China

Received:2019-07-02 Revised:2020-02-29 Published:2020-10-31
Supported by:
The National Natural Science Foundation of China(No. 41601388)

摘要/Abstract

摘要： 像点提取精度是高分辨光学遥感卫星几何定标精度的关键因素之一。本文提出一种基于轻小型、自动化反射点源的像点提取方法，以参数化高斯模型拟合获取点源影像的像点坐标。在轨试验结果初步表明，反射点源法所提取的像点坐标的共线误差小于0.001像素，比例常量的相对标准偏差优于5‰，与质心法等常用方法提取的点源像点坐标相比较，精度优于0.05像素。反射点源不仅能够实现高精度的像点提取，而且还能够实现高分辨率光学遥感卫星的高精度几何定标与像质评价，对提高我国航天遥感立体测绘精度具有重要意义。

关键词: 几何定标, 像点提取, 反射点源, 共线检验, 比例检验

Abstract: Pixel extraction accuracy is one of the key factors for geometric calibration accuracy of high resolution optical remote sensing satellites. A pixel extraction method is presented based on the light and small, automated reflected point source, which obtained pixel coordinates of point source image by parameterized Gaussian model fitting. The preliminary results show that the collinear error of pixel coordinates extracted by the reflected point source method is less than 0.001 pixels. The relative standard deviation of the proportional constant is also less than 5‰. And pixel coordinates extraction accuracy of point source image is less than 0.05 pixels comparing with common methods such as centroid method. The reflected point source can not only achieve high-precision pixel extraction, but also realize high-precision geometric calibration and image quality evaluation of high resolution optical remote sensing satellites, which is of great significance for improving the accuracy of China's space remote sensing stereo mapping.

Key words: geometric calibration, pixel extraction, reflected point source, collineation checkout, scale checkout

中图分类号:

P237

徐伟伟, 张黎明, 李鑫, 杨宝云. 高分辨率光学遥感卫星反射点源像点提取方法[J]. 测绘学报, 2020, 49(10): 1295-1302.

XU Weiwei, ZHANG Liming, LI Xin, YANG Baoyun. Pixel extraction of reflected point source image for high spatial resolution optical remote sensing satellite[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(10): 1295-1302.

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高分辨率光学遥感卫星反射点源像点提取方法

Pixel extraction of reflected point source image for high spatial resolution optical remote sensing satellite

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