大畸变航天遥感相机焦平面弧形拼接 
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Focal Plane Curve Splicing of Large Distortion Aerospace Remote Sensing Camera
北京空间机电研究所先进光学遥感技术北京市重点实验室, 北京 100094
图 & 表
图 1. 像移速度矢量和积分速度矢量
Fig. 1. Image motion speed vector and integral speed vector
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图 2. 枕形畸变光学系统弧形拼接方向
Fig. 2. Curve splicing direction of pincushion distortion optical system
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图 3. 桶形畸变光学系统弧形拼接方向
Fig. 3. Curve splicing directions of barrel distortion optical system
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图 4. 选取基准点的示意图
Fig. 4. Schematic diagram of selecting reference points
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图 5. 弧形拼接原理
Fig. 5. Schematic of curve splicing
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表 1不同CCD上6个位置拟合的失配角
Table1. Mismatch angles of obtained by fitting 6 positions on different CCDsunit: (°)
| Detector | θ1 | θ2 | θ3 | θ4 | θ5 | θ6 |
|---|
| CCD1 | 0 | 0.0418 | 0.0837 | 0.1255 | 0.1674 | 0.2093 | | CCD2 | 0.2093 | 0.2512 | 0.2931 | 0.3351 | 0.3771 | 0.4191 |
|
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表 2弧形拼接前后各点MTF的下降值
Table2. MTF decline of each point before and after curve splicingunit: %
| Point | CCD1 | CCD2 |
|---|
| Before | After | Before | After |
|---|
| 1 | 0.00 | 4.05 | 11.90 | 4.08 | | 2 | 0.49 | 1.10 | 16.86 | 1.12 | | 3 | 1.96 | 0.12 | 22.51 | 0.13 | | 4 | 4.38 | 0.12 | 28.78 | 0.12 | | 5 | 7.71 | 1.11 | 35.53 | 1.12 | | 6 | 11.90 | 4.07 | 42.65 | 4.07 |
|
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表 3弧形拼接前后CCD多光谱之间的配准误差
Table3. Registration error between CCD multi-spectrum before and after curve splicingunit: pixel
| Point | CCD1 | CCD2 |
|---|
| Before | After | Before | After |
|---|
| 1 | 0.00 | -0.64 | 1.60 | -0.63 | | 2 | 0.32 | -0.32 | 1.93 | -0.31 | | 3 | 0.64 | 0.00 | 2.25 | 0.02 | | 4 | 0.96 | 0.32 | 2.58 | 0.34 | | 5 | 1.28 | 0.64 | 2.91 | 0.67 | | 6 | 1.60 | 0.96 | 3.24 | 0.99 |
|
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李富强, 曹东晶, 姜海滨, 雷文平, 项卫国, 郝言慧, 魏学敏, 黄伟, 常君磊, 窦莲英. 大畸变航天遥感相机焦平面弧形拼接[J]. 光学学报, 2020, 40(20): 2008001. Fuqiang Li, Dongjing Cao, Haibin Jiang, enping Lei, Weiguo Xiang, Yanhui Hao, Xuemin Wei, Wei Huang, Junlei Chang, Lianying Dou. Focal Plane Curve Splicing of Large Distortion Aerospace Remote Sensing Camera[J]. Acta Optica Sinica, 2020, 40(20): 2008001.
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