Dark field deduction method of TDI-CCD based on LM 98640

Yong-hui NING; Han-zhou GUO; da YU; Qing-lei ZHAO

doi:10.3788/YJYXS20193406.0592

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Dark field deduction method of TDI-CCD based on LM 98640

Image Processing | 更新时间：2020-07-05

- Dark field deduction method of TDI-CCD based on LM 98640
- Chinese Journal of Liquid Crystals and Displays Vol. 34, Issue 6, Pages: 592-597(2019)
- 作者机构：
  
  1.中国科学院长春光学精密机械与物理研究所, 吉林长春 130031
  2.长春国科医工科技发展有限公司, 吉林长春 130031
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20193406.0592
  CLC： V447.3;TP751.1
- Received：25 November 2018，
  
  Accepted：09 April 2019，
  
  Published：05 June 2019
- 稿件说明：
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Yong-hui NING, Han-zhou GUO, da YU, et al. Dark field deduction method of TDI-CCD based on LM 98640[J]. Chinese journal of liquid crystals and displays, 2019, 34(6): 592-597.
DOI：

Yong-hui NING, Han-zhou GUO, da YU, et al. Dark field deduction method of TDI-CCD based on LM 98640[J]. Chinese journal of liquid crystals and displays, 2019, 34(6): 592-597. DOI： 10.3788/YJYXS20193406.0592.

摘要

为了实现相关双采样模式下，视频处理器LM98640的暗电平扣除功能，设计了数字暗场扣除方法。通过获得TDI-CCD的暗场数据，进行统计分析，估算当前条件下的真实暗电平水平；通过设置LM98640的偏置寄存器，实现暗电平的模拟扣除功能；通过暗场灰度动态检测和实时更新设置，保证暗场在不同的温度水平下具有0~3的灰度均值；通过时序控制，保证偏置参数加载不影响图像内容；通过偏置参数功能分区，保证暗场扣除和偏置调整功能的完整性。实验结果表明，该方法在TDI-CCD成像系统长时间工作时，能有效控制暗场均值在0~3量化灰度范围。通过检测更新扣除机制，实现了对噪声的帧扣除，避免了行扣除不准确带来的噪声，有效降低了沿轨方向高频分量。

Abstract

A digital dark field deduction method was designed based on video processor LM98640 in the CDS mode. The real dark field value on that condition was calculated by the statistic of the obtained TDI-CCD dark field gray values. The dark field deduction in the analog circuit was realized by setting the offset registers of LM98640. By the real-time detection to the dark reference gray value and dynamic updating the offset parameters

the dark field values between 0 and 3 on average under different temperatures were ensured. By controlling the timing sequence

the image integrity was ensured while the offset parameters were set. The integrity of dark field deduction and bias adjustment function were ensured by separating the whole offset range into 2 parts. The results show that this method can make the dark field gray values within 3 LSB(least significant bit) when the TDI-CCD imaging system works for a long time. By detecting and updating the deduction mechanism

the frame deduction of noise is realized

the noise caused by inaccurate line deduction is avoided

and the high frequency noise along the orbit are effectively reduced.

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references

葛张峰, 余晨辉, 陈鸣, 等. AlGaN日盲紫外雪崩光电探测器暗电流研究[J].红外与激光工程, 2018, 47(9):0920003.

GE Z F, YU C H, CHEN M, et al . Research on dark current of AlGaN solar-blind ultraviolet avalanche photodetectors[J]. Infrared and Laser Engineering , 2018, 47(9):0920003. (in Chinese)

李广泽, 刘金国, 宁飞, 等.基于等效成像模型的立体测绘相机成像信噪比分析[J].仪器仪表学报, 2012, 33(5):1096-1101.

LI G Z, LIU J G, NING F, et al . Imaging SNR analysis of stereo mapping camera based on equivalent imaging model[J]. Chinese Journal of Scientific Instrument , 2012, 33(5):1096-1101. (in Chinese)

魏伟, 刘恩海, 郑中印. CCD相机视频处理电路设计[J].光电工程, 2012, 39(6):144-150.

WEI W, LIU E H, ZHENG Z Y. Video signal processing circuit design of CCD camera[J]. Opto - Electronic Engineering , 2012, 39(6):144-150. (in Chinese)

郑亮亮, 张贵祥, 贺小军, 等. TDI CCD成像电路系统响应模型的研究[J].光学学报, 2014, 34(11):1104001.

ZHENG L L, ZHANG G X, HE X J, et al . Research on response model of TDI CCD image system[J]. Acta Optica Sinica , 2014, 34(11):1104001. (in Chinese)

王华, 曹剑中, 王华伟, 等.基于估计方法的CMOS图像传感器列固定模式噪声校正方法[J].红外与激光工程, 2013, 42(7):1928-1932.

WANG H, CAO J Z, WANG H W, et al . Column fixed pattern noise correction of the CMOS image sensor based on estimation method[J]. Infrared and Laser Engineering , 2013, 42(7):1928-1932. (in Chinese)

李丙玉, 王晓东. CCD视频信号集成处理器的暗电平自动校正[J].液晶与显示, 2010, 25(6):879-883.

LI B Y, WANG X D. Black level auto-correction in CCD signal processor[J]. Chinese Journal of Liquid Crystals and Displays , 2010, 25(6):879-883. (in Chinese)

董建婷, 杨小乐, 董杰.面阵CMOS图像传感器性能测试及图像处理[J].红外与激光工程, 2013, 42(12):3396-3401.

DONG J T, YANG X L, DONG J. Performance test and image processing of area CMOS image sensor[J]. Infrared and Laser Engineering , 2013, 42(12):3396-3401. (in Chinese)

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