Infrared and Laser Engineering, Volume. 50, Issue 3, 20211022(2021)

Image registration of the dual-channel spaceborne hyperspectral imager with motion compensation

Huijie Zhao1, Xiaoyuan Zhang1, Guorui Jia1, Xianfei Qiu1, and Liang Zhai2
Author Affiliations
  • 1Key Laboratory of Education Ministry of Precision Opto-mechatromics Technology, School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China
  • 2Chinese Academy of Surveying and Mapping, Beijing 100830, China
  • show less

    Latest generation of dual-channel spaceborne hyperspectral imager based on visible near infrared (VNIR) and short wave infrared (SWIR) uses the field slitter to separate VNIR and SWIR channels into several sub-fields, and each sub-field image has different ground area at the same time. When using motion compensation technology to improve signal to noise ratio of the instrument, the observation angles of each sub-field are different, which leads to more complicated mismatch of images and make it impossible to get the continuous VNIR-SWIR spectrum of the ground pixel. The rule of image distortion and dual-channel mismatch quantitatively was analyzed by Rigorous imaging model, and the registration scheme by using geometric orientation of each sub-field separately as well as the phase correlation method was proposed on this basis. Verification based on dual-channel spaceborne hyperspectral simulated data of Dongtianshan under motion compensation was performed. The result shows that registration accuracy of traditional scheme based on correlation of images reaches 3.9 pixel, which means the continuous VNIR-SWIR spectrum of the ground pixel is still unavailable. The registration accuracy of the scheme proposed by this paper reaches 0.3 pixel, and the reflectance spectrum overlap ratio error of the overlapping bands of VNIR and SWIR reduces from 41.5% to 1.2%.

    Tools

    Get Citation

    Copy Citation Text

    Huijie Zhao, Xiaoyuan Zhang, Guorui Jia, Xianfei Qiu, Liang Zhai. Image registration of the dual-channel spaceborne hyperspectral imager with motion compensation[J]. Infrared and Laser Engineering, 2021, 50(3): 20211022

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Image processing

    Received: Feb. 18, 2021

    Accepted: --

    Published Online: Jul. 15, 2021

    The Author Email:

    DOI:10.3788/IRLA20211022

    Topics