Infrared and Laser Engineering, Volume. 50, Issue 5, 20200492(2021)
Real-time calculation method of integral time based on interframe angle point matching
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Fig. 1. Integration time real-time measurement system based on interframe angle matching distance measurement
Fig. 3. Schematic diagram of high frequency array CMOS image motion velocity
Fig. 4. Elimination effect of prior knowledge on Harris angle point mismatching
Fig. 6. Simulation results of measurement accuracy after sub-pixel positioning(Matching errors of zero are not shown in the figure above) 亚像元定位后 测量精度仿真结果（匹配误差为0的点对在上图中未作显示）
Table 1. Before and after optimization with Harris algorithm
View tableView in ArticleTable 1. Before and after optimization with Harris algorithm
Before optimization After optimization Nunber of feature points detected 343/527 118/201 Logarithm of feature points match 88 14 Validity ratio of feature points 10.11% 4.38% Logarithm of mismatched points 12 1 Mismatch ratio 13.63% 7.14% Code execution time/s 2.539 1.325 Mean of matching precision 0.0431 0.0394
Table 2. Influence factors of integral-time residual error on image quality in different TDI stages
View tableView in ArticleTable 2. Influence factors of integral-time residual error on image quality in different TDI stages
Integration stages ${ { {MT\!F} }_{\Delta { {{T} }_{\rm{int} } } } }$ （0.1 pixel precision） ${ { {MT\!F} }_{\Delta { {{T} }_{ {int} } } } }$ （0.2 pixel precision） 6 0.9989 0.9976 12 0.9957 0.9905 24 0.9830 0.9622 48 0.9329 0.8540 72 0.8529 0.6899 96 0.7478 0.4915
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Xuming Wang, Wei Huang, Bingxian Zhang, Jiuzhe Wei, Xuxia Zhuang, Qiufeng Lv, Haibin Jiang. Real-time calculation method of integral time based on interframe angle point matching[J]. Infrared and Laser Engineering, 2021, 50(5): 20200492
Paper Information
Category: Optical design
Received: Nov. 30, 2020
Accepted: --
Published Online: Aug. 13, 2021
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