High-Precision Positioning Method for High-Resolution Optical Satellite Imagery Accelerated by PCG-GPU Without GCPs

Qing Fu; Jun Chen; Weijian Liang; Wenlang Luo

doi:10.3788/LOP242166

Laser & Optoelectronics Progress, Volume. 62, Issue 10, 1028005(2025)

High-Precision Positioning Method for High-Resolution Optical Satellite Imagery Accelerated by PCG-GPU Without GCPs

Qing Fu^1,2,3, Jun Chen^1,2,3, Weijian Liang^1,2,3、*, and Wenlang Luo^1,2,3

Author Affiliations

¹Jiangxi Province Key Laboratory of Electronic Data Control and Forensics, Ji'an 343009, Jiangxi , China

²School of Electronics and Information Engineering, Jinggangshan University, Ji'an 343009, Jiangxi , China

³Ji'an Key Laboratory of Agricultural Remote Sensing, Ji'an 343009, Jiangxi , China

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Figures & Tables(9)

Fig. 1. Schematic of virtual control points

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Fig. 2. Sparse matrix storage format. (a) COO format; (b) CSR format

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Fig. 3. Flow chart of large-scale adjustment solution combined with PCG and GPU acceleration (the blue dashed box represents the GPU parallel computing part)

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Fig. 4. Back-projection error (red lines indicate back-projection error)

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Fig. 5. Coverage range of satellite images in Jiangxi area

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Fig. 6. Distribution of tie points

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Fig. 7. Back-projection error of tie points. (a) Back-projection error in x direction; (b) back-projection error in y direction

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Table 1. Experimental data details
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Table 1. Experimental data details
Experimental area Data source Terrain Capture time Number of images
Jiangxi ZY-3 Plain， hills， mountains 2017‒2020 829

Table 2. Comparison of reprojection errors of different methods
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Table 2. Comparison of reprojection errors of different methods
Experimental area Single-core CPU Multi-core CPU Proposed
x y xy x y xy x y xy
Jiangxi 0.461 0.650 0.797 0.461 0.650 0.797 0.461 0.652 0.799

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Qing Fu, Jun Chen, Weijian Liang, Wenlang Luo. High-Precision Positioning Method for High-Resolution Optical Satellite Imagery Accelerated by PCG-GPU Without GCPs[J]. Laser & Optoelectronics Progress, 2025, 62(10): 1028005

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