大气与环境光学学报 ›› 2018, Vol. 13 ›› Issue (2): 141-149.

• 光学遥感 • 上一篇    下一篇

多角度偏振探测仪的相对辐射校正方法研究

翁建文1,2,洪津 1,涂碧海1,袁银麟1,范慧敏1,2,杨伟锋1,乔延利1   

  1. (1 中国科学院合肥物质科学研究院安徽光学精密机械研究所,安徽 合肥 230031; 
    2 中国科学技术大学,安徽 合肥 230026)
  • 收稿日期:2017-03-22 修回日期:2017-03-28 出版日期:2018-03-28 发布日期:2018-04-15
  • 通讯作者: 翁建文(1990-),男,江西贵溪人,研究生,主要从事遥感图像处理技术,软件技术方面的研究。 E-mail:wjw1990@mail.ustc.edu.cn
  • 作者简介:翁建文(1990-),男,江西贵溪人,研究生,主要从事遥感图像处理技术,软件技术方面的研究。
  • 基金资助:

    Supported by Satellite Data Simulation Technology(卫星数据模拟技术, 50-Y20A38-0509-15/16)

Relative Radiation Correction Methods for Directional Polarized Camera

WENG Jianwen1,2, TU Bihai1, YUAN Yinlin1, FAN Huimin1,2,YANG Weifeng1, HONG Jin1   

  1. (1 Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China; 
    2 University of Science and Technology of China,Hefei 230026,China;)
  • Received:2017-03-22 Revised:2017-03-28 Published:2018-03-28 Online:2018-04-15
  • Supported by:

    Supported by Satellite Data Simulation Technology(卫星数据模拟技术, 50-Y20A38-0509-15/16)

摘要:

相对辐射校正是实现多角度偏振探测仪全视场高精度辐射定标的关键技术之一。提出了一种高精度自动化的相对辐射校正方法,采用15×15个分视场扫描测量的方式,通过高精度大型二维转台和大口径积分球参考光源实现全视场的辐射响应测量;模拟在轨工作模式,规范了数据采集流程,编写数据采集软件实现了辐射响应图像数据获取;设计数据图像拼接算法和相关的数据处理方法,完成了相对辐射校正的数据处理和精度分析。数据比对分析和精度分析结果表明相对辐射校正精度在0.5%~0.8%之内。

关键词: 相对辐射校正, 辐射定标, 全视场, 图像拼接, 精度

Abstract:

Relative radiation correction is one of the key technologies to realize high precision and full field radiometric calibration for the directional polarized camera. A high-precision and automatic method of relative radiation correction is proposed. 15×15 points vision field scanning measurements are used. The panoramic imaging measurements of radiation response are fulfilled through the integration of the high-precision and large two-dimension rotating platforms and large-diameter integrating sphere reference light source. On-orbit working mode is simulated, data collecting process is regulated, data acquisition software is written, and the acquisition of radiation response image data is fulfilled. A stitching algorithm for data image and a processing method for relative data are designed. The data processing and precision analyzing of relative radiation correction are completed. Results of data comparison analysis and accuracy analysis show that the precision of relative radiation calibration is within 0.5% ~ 0.8%.

Key words: relative radiometric correction, radiometric calibration, full field, image mosaicking, precision

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