Block Adjustment of Large-Scale Domestic Optical Satellite Remote Sensing Imagery Without GCPs in the Antarctic

Qing Fu; Wenlang Luo; Chen Guo

doi:10.3788/LOP231971

Laser & Optoelectronics Progress, Volume. 61, Issue 18, 1828005(2024)

Block Adjustment of Large-Scale Domestic Optical Satellite Remote Sensing Imagery Without GCPs in the Antarctic

Qing Fu^1,2,3, Wenlang Luo^1,2,3、*, and Chen Guo^1,2,3

Author Affiliations

¹School of Electronics and Information Engineering, Jinggangshan University, Ji'an 343009, Jiangxi, China

²Jiangxi Engineering Laboratory of IoT Technologies for Crop Growth, 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. Overall technology flowchart

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Fig. 2. Tie point in the multiple satellite stereo image pairs

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Fig. 3. Distance from tie point to epipolar line

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Fig. 4. Image distribution in Antarctic

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Fig. 5. Tie points distribution

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Fig. 6. Residual distribution of backprojection image point. (a) Residual distribution along X direction; (b) residual distribution along Y direction

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Table 1. Iteration times and adjustment cost time of different algorithms

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Table 1. Iteration times and adjustment cost time of different algorithms

Method	Iteration times	Time costing
Traditional dense matrix method
Single-core CPU PCG method	2	129.942 s（sparse matrix）
Multi-core CPU PCG method	2	44.834 s（sparse matrix）
Multi-core CPU and GPU parallel method	2	9.096 s（sparse matrix）

Table 2. Adjustment speed-up ratio of different algorithms
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Table 2. Adjustment speed-up ratio of different algorithms
Method Speed-up ratio
Single-core CPU PCG method 1
Multi-core CPU PCG method 2.90
Multi-core CPU and GPU parallel method 11.72

Table 3. Backprojection image point residual of different solutions
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Table 3. Backprojection image point residual of different solutions
Solution X_max X_mean X_RMSE Y_max Y_mean Y_RMSE
Before BA 6.061 0.371 1.548 8.906 0.192 1.699
After BA 3.920 0.001 0.169 5.933 0.001 0.191

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Qing Fu, Wenlang Luo, Chen Guo. Block Adjustment of Large-Scale Domestic Optical Satellite Remote Sensing Imagery Without GCPs in the Antarctic[J]. Laser & Optoelectronics Progress, 2024, 61(18): 1828005

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