Optics and Precision Engineering, Volume. 29, Issue 12, 2924(2021)
Geometric correction of optical remote sensing satellite images captured by linear array sensors circular scanning perpendicular to the orbit
The new linear array circular scanning optical remote sensing satellite has achieved both super large breadth and high resolution through circular scanning perpendicular to the orbit and along the orbit splicing. However, its special imaging mode results in serious geometric distortion of the image, which requires correction. A geometric correction method for linear array circular scanning optical remote sensing satellite images is proposed. Firstly, a strict imaging model of a linear array circular scanning image is constructed based on the scientific analysis of satellite imaging characteristics. Subsequently, the image is preliminarily corrected using image orbit, attitude parameters, and open-source DEM. Finally, several homonymous points are obtained using reference orthophoto image matching as the control points, and the image is accurately corrected using spline function fitting. To verify the effectiveness of the proposed method, experiments are performed using simulated images, and the results show that the accuracy of the proposed method can reach 1 pixel. This method can effectively solve the issue of large geometric distortion of linear array circular scanning satellite images, provide high-precision image products, and has significant application value.
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Wu XUE, Peng WANG, Ling-yu ZHONG. Geometric correction of optical remote sensing satellite images captured by linear array sensors circular scanning perpendicular to the orbit[J]. Optics and Precision Engineering, 2021, 29(12): 2924
Category: Information Sciences
Received: May. 7, 2021
Accepted: --
Published Online: Jan. 20, 2022
The Author Email: Peng WANG (zbxysimon@163.com)