多通道联合调偏流机构的CMOS面阵成像方法

doi:10.13229/j.cnki.jdxbgxb20200398

吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (4): 1476-1481.doi: 10.13229/j.cnki.jdxbgxb20200398

• 通信与控制工程 • 上一篇

多通道联合调偏流机构的CMOS面阵成像方法

张刘(),沈亮,王文华(),刘赫

吉林大学仪器科学与电气工程学院，长春 130012

收稿日期:2020-06-08 出版日期:2021-07-01 发布日期:2021-07-14
通讯作者: 王文华 E-mail:zhangliu@jlu.edu.cn;wangwh900@jlu.edu.cn
作者简介:张刘（1978-），男，教授，博士.研究方向：航天光学遥感系统设计，星敏感器技术.E-mail： zhangliu@jlu.edu.cn
基金资助:
科技部重点研发计划项目(2016YFB0501000);科工局国防基础科研重点突破项目;装备预研领域基金项目(JZX7Y20190254047001);上海航天科技创新基金项目(SAST2018046);国防基础科研计划项目(JCKY2019110)

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

Liu ZHANG(),Liang SHEN,Wen-hua WANG(),He LIU

College of Instrumentation & Electrical Engineering，Jilin University，Changchun 130012，China

Received:2020-06-08 Online:2021-07-01 Published:2021-07-14
Contact: Wen-hua WANG E-mail:zhangliu@jlu.edu.cn;wangwh900@jlu.edu.cn

摘要/Abstract

摘要：

现有的探测器分片旋转调整偏流角方式虽然能提高偏流角的匹配精度，但会使得焦面上采取光学拼接的探测器所合成图像不连续。针对以上问题，设计了一套基于CMOS图像传感器GMAX3265和FPGA的电子学成像系统，此系统利用CMOS图像传感器开窗模式，实现了相邻探测器所合成图像中非连续部分的裁剪，从而形成了连续的图像条带。首先，对比分析了探测器采取光学拼接时，传统调偏流方法和探测器分片旋转调偏流方法所合成图像的差异；其次，通过几何关系求出被裁减行数并分析了裁剪精度；最后，通过系统总体设计和驱动时序设计完成了这套电子学系统。实验结果表明，相邻探测器旋转角度差为0.1°时，误差像素数与总像素数之比为0.1165%，不会丢失过多的图像细节，提高了图像连续性。

关键词: 分片旋转, 光学拼接, 不连续, CMOS图像传感器, 开窗

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

中图分类号:

V443.5

张刘,沈亮,王文华,刘赫. 多通道联合调偏流机构的CMOS面阵成像方法[J]. 吉林大学学报(工学版), 2021, 51(4): 1476-1481.

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.

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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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多通道联合调偏流机构的CMOS面阵成像方法

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

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