多通道联合调偏流机构的CMOS面阵成像方法

doi:10.13229/j.cnki.jdxbgxb20200398

Abstract

Abstract:

Although the existing method of rotation of each sensor can improve the matching accuracy of the drift angle,it results in the discontinuity of the image synthesized by the detector with optical butting on the focal plane. In order to solve the above problems, an electronic imaging system based on CMOS image sensor GMAX3265 and FPGA is designed. The system uses the windowing mode of CMOS image sensor to Real-time clipping the nonlinear part of the image synthesized by adjacent detectors, thus forming a continuous image strip. Firstly, the difference between the traditional drift angle compensation method and the slice rotation drift angle compensation method is compared and analyzed when the detector adopts optical butting. Secondly, the number of cutting rows is calculated and the cutting precision is analyzed. Finally, the electronic system is completed through the overall system design and driving timing design. The experimental results show that when the rotation angle difference between adjacent detectors is 0.1 °, the ratio of error pixels to total pixels is 0.1165%, which does not lose too much image and improves image continuity.

Key words: rotation of each sensor, optical butting, discontinuity, CMOS image sensor, windowing

CLC Number:

V443.5

Liu ZHANG,Liang SHEN,Wen-hua WANG,He LIU. CMOS array imaging method of coordinated multichannel based on drift angle adjusting mechanism[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1476-1481.

Figures/Tables 9

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输入值 /（°）	sinθ			cosθ
输入值 /（°）	FPGA仿真值	MATLAB计算值	误差值	FPGA仿真值	MATLAB计算值	误差值
0.5	0.999 962 330	0.999 961 923	4.067 98e-07	0.008 666 992	0.008 726 535	5.954 31e-05
1	0.999 847 412	0.999 847 695	2.830 39e-07	0.017 455 101	0.017 452 407	2.694 10e-06
1.5	0.999 658 585	0.999 657 325	1.259 62e-06	0.026 119 947	0.026 176 949	5.700 11e-05
2	0.999 390 602	0.999 390 827	2.249 09e-07	0.034 904 957	0.034 899 497	5.460 15e-06
2.5	0.999 050 379	0.999 048 222	2.157 20e-06	0.043 565 273	0.043 619 387	5.411 38e-05
3	0.998 628 855	0.998 629 535	6.799 80e-07	0.052 344 322	0.052 335 957	8.365 52e-06
3.5	0.998 137 712	0.998 134 798	2.914 07e-06	0.060 997 248	0.061 048 540	5.129 20e-05

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CMOS array imaging method of coordinated multichannel based on drift angle adjusting mechanism

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