Pixel Extraction and Accuracy Verification of Optical Remote Sensing Satellite Based on Reflected Point Source

Qiang Wang; Weiwei Xu; Xiaolong Si; Xin Li; Baoyun Yang; Liming Zhang

doi:10.3788/AOS231518

Acta Optica Sinica, Volume. 44, Issue 6, 0628004(2024)

Pixel Extraction and Accuracy Verification of Optical Remote Sensing Satellite Based on Reflected Point Source

Qiang Wang^1,2, Weiwei Xu^2、*, Xiaolong Si², Xin Li², Baoyun Yang², and Liming Zhang²

Author Affiliations

¹Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui , China

²Key Laboratory of Optical Calibration and Characterization, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui , China

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Figures & Tables(13)

Fig. 1. In orbit verification experiment. (a) Reflected point source; (b) image of reflected point source

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Fig. 2. Image of reflected point source

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Fig. 3. Surface fitting

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Fig. 4. Pixel extraction accuracy

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Fig. 5. Point spread function

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Fig. 6. System MTF

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Table 1. Pixel coordinates of reflected point source image

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Table 1. Pixel coordinates of reflected point source image

Position	$x_{0}$ /pixel	$y_{0}$ /pixel	Position	$x_{0}$ /pixel	$y_{0}$ /pixel
$P_{1}$	12201.984	10136.056	$P_{10}$	12184.156	10125.470
$P_{2}$	12203.410	10125.823	$P_{11}$	12184.315	10115.786
$P_{3}$	12203.768	10116.189	$P_{12}$	12184.472	10106.093
$P_{4}$	12203.975	10106.509	$P_{13}$	12184.630	10096.376
$P_{5}$	12204.124	10096.858	$P_{14}$	12176.634	10080.741
$P_{6}$	12194.434	10096.645	$P_{15}$	12174.948	10096.056
$P_{7}$	12194.233	10106.227	$P_{16}$	12174.764	10105.925
$P_{8}$	12194.083	10116.030	$P_{17}$	12174.549	10115.615
$P_{9}$	12193.865	10125.718	$P_{18}$	12174.391	10125.415

Table 2. Positioning coordinates after adjustment

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Table 2. Positioning coordinates after adjustment

Position	$x_{0}$ /pixel	$y_{0}$ /pixel	Position	$x_{0}$ /pixel	$y_{0}$ /pixel
$P_{1}$	12201.990	10136.072	$P_{10}$	12184.133	10125.507
$P_{2}$	12203.569	10125.884	$P_{11}$	12184.298	10115.767
$P_{3}$	12203.737	10116.175	$P_{12}$	12184.488	10106.096
$P_{4}$	12203.958	10106.499	$P_{13}$	12184.653	10096.398
$P_{5}$	12204.116	10096.788	$P_{14}$	12176.673	10080.708
$P_{6}$	12194.402	10096.628	$P_{15}$	12174.950	10096.182
$P_{7}$	12194.210	10106.288	$P_{16}$	12174.755	10105.895
$P_{8}$	12194.029	10116.005	$P_{17}$	12174.584	10115.609
$P_{9}$	12193.808	10125.705	$P_{18}$	12174.380	10125.325

Table 3. Verification of the pixel extraction accuracy using the point source method
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Table 3. Verification of the pixel extraction accuracy using the point source method
Direction /pixel RMSE RMSE-DM
$∆ x$ 0.0466 0.0291
$∆ y$ 0.0483 0.0377
$P l a n e$ 0.0671 0.0476

Table 4. Pixel extraction results by multiple methods

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Table 4. Pixel extraction results by multiple methods

Position	$I I$		$I I I$
Position	$x_{0}$ /pixel	$y_{0}$ /pixel	$x_{0}$ /pixel	$y_{0}$ /pixel
$P_{1}$	12201.985	10136.056	12201.967	10136.048
$P_{2}$	12203.419	10125.823	12203.386	10125.826
$P_{3}$	12203.763	10116.187	12203.732	10116.196
$P_{4}$	12203.975	10106.510	12203.948	10106.521
$P_{5}$	12204.106	10096.854	12204.115	10096.831
$P_{6}$	12194.439	10096.641	12194.415	10096.641
$P_{7}$	12194.217	10106.227	12194.229	10106.254
$P_{8}$	12194.066	10116.025	12194.070	10116.016
$P_{9}$	12193.874	10125.722	12193.844	10125.727
$P_{10}$	12184.157	10125.470	12184.141	10125.478
$P_{11}$	12184.318	10115.783	12184.312	10115.785
$P_{12}$	12184.470	10106.096	12184.466	10106.107
$P_{13}$	12184.621	10096.379	12184.633	10096.388
$P_{14}$	12176.621	10080.742	12176.648	10080.750
$P_{15}$	12174.955	10096.056	12174.935	10096.027
$P_{16}$	12174.763	10105.924	12174.751	10105.906
$P_{17}$	12174.540	10115.611	12174.546	10115.623
$P_{18}$	12174.369	10125.409	12174.309	10125.433

Table 5. Errors of pixel coordinate

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Table 5. Errors of pixel coordinate

Position	$I$		$I I$		$I I I$
Position	$x_{0}$ /pixel	$y_{0}$ /pixel	$x_{0}$ /pixel	$y_{0}$ /pixel	$x_{0}$ /pixel	$y_{0}$ /pixel
$P_{1}$	0.0062	0.0025	0.0058	0.0029	-0.0120	-0.0054
$P_{2}$	0.0144	-0.0010	0.0048	-0.0012	-0.0192	0.0022
$P_{3}$	0.0085	-0.0036	0.0141	-0.0017	-0.0226	0.0053
$P_{4}$	0.0088	-0.0031	0.0090	-0.0045	-0.0178	0.0075
$P_{5}$	-0.0089	0.0063	0.0090	0.0103	-0.0001	-0.0167
$P_{6}$	0.0098	-0.0012	0.0047	0.0026	-0.0144	-0.0014
$P_{7}$	-0.0091	-0.0087	0.0063	-0.0090	0.0028	0.0177
$P_{8}$	-0.0074	0.0017	0.0101	0.0063	-0.0027	-0.0079
$P_{9}$	0.0130	-0.0002	0.0037	-0.0047	-0.0167	0.0049
$P_{10}$	0.0051	-0.0026	0.0049	-0.0028	-0.0100	0.0055
$P_{11}$	0.0032	-0.0018	-0.0003	0.0017	-0.0030	0.0001
$P_{12}$	0.0003	-0.0028	0.0028	-0.0059	-0.0031	0.0087
$P_{13}$	-0.0068	-0.0022	0.0020	-0.0047	0.0048	0.0070
$P_{14}$	-0.0132	-0.0019	-0.0008	-0.0036	0.0140	0.0055
$P_{15}$	0.0088	0.0093	0.0018	0.0101	-0.0107	-0.0194
$P_{16}$	0.0035	0.0056	0.0051	0.0068	-0.0086	-0.0124
$P_{17}$	-0.0048	-0.0054	0.0039	-0.0011	0.0008	0.0065
$P_{18}$	0.0126	-0.0099	0.0346	-0.0039	-0.0472	0.0138

Table 6. Positioning coordinates after conventional method adjustment

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Table 6. Positioning coordinates after conventional method adjustment

Position	$I I$		$I I I$
Position	$x_{0}$ /pixel	$y_{0}$ /pixel	$x_{0}$ /pixel	$y_{0}$ /pixel
$P_{1}$	12201.990	10136.071	12201.956	10136.077
$P_{2}$	12203.568	10125.883	12203.543	10125.887
$P_{3}$	12203.734	10116.175	12203.718	10116.176
$P_{4}$	12203.955	10106.498	12203.947	10106.498
$P_{5}$	12204.111	10096.788	12204.112	10096.785
$P_{6}$	12194.396	10096.628	12194.397	10096.626
$P_{7}$	12194.205	10106.288	12194.197	10106.288
$P_{8}$	12194.026	10116.004	12194.010	10116.007
$P_{9}$	12193.806	10125.703	12193.781	10125.709
$P_{10}$	12184.130	10125.506	12184.105	10125.512
$P_{11}$	12184.294	10115.766	12184.278	10115.770
$P_{12}$	12184.483	10106.095	12184.475	10106.097
$P_{13}$	12184.647	10096.398	12184.648	10096.397
$P_{14}$	12176.664	10080.708	12176.679	10080.704
$P_{15}$	12174.943	10096.181	12174.944	10096.181
$P_{16}$	12174.749	10105.894	12174.742	10105.896
$P_{17}$	12174.579	10115.608	12174.563	10115.613
$P_{18}$	12174.377	10125.323	12174.352	10125.331

Table 7. Accuracy verification of multiple pixel extraction results
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Table 7. Accuracy verification of multiple pixel extraction results
Direction /pixel $I$ $I I$ $I I I$
$∆ x$ 0.0291 0.0307 0.0306
$∆ y$ 0.0377 0.0362 0.0354
$P l a n e$ 0.0476 0.0475 0.0468

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Qiang Wang, Weiwei Xu, Xiaolong Si, Xin Li, Baoyun Yang, Liming Zhang. Pixel Extraction and Accuracy Verification of Optical Remote Sensing Satellite Based on Reflected Point Source[J]. Acta Optica Sinica, 2024, 44(6): 0628004

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