Improvement of exposure performance of linear array CIS camera by twotrigger method

LUO Ying; TAN Pei-yan; LIU Lin; YE Yu-tang; LIU Yong

doi:10.3788/OPE.20142202.0245

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Improvement of exposure performance of linear array CIS camera by twotrigger method

Modern Applied Optics | 更新时间：2020-08-13

- Improvement of exposure performance of linear array CIS camera by twotrigger method
- Optics and Precision Engineering Vol. 22, Issue 2, Pages: 245-251(2014)
- 作者机构：
  
  1. 电子科技大学现代光电测控及仪器实验室摩米实验室,四川成都,610054
  2. 成都术有科技有限公司,四川成都,610054
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142202.0245
  CLC： TB853.29
- Received：26 July 2013，
  
  Published：20 February 2014
- 稿件说明：
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罗颖,谭沛岩,刘霖等. 用二次触发法改进接触式传感器线阵相机的曝光性能[J]. 光学精密工程, 2014,22(2): 245-251

LUO Ying, TAN Pei-yan, LIU Lin etc. Improvement of exposure performance of linear array CIS camera by twotrigger method[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 245-251
罗颖,谭沛岩,刘霖等. 用二次触发法改进接触式传感器线阵相机的曝光性能[J]. 光学精密工程, 2014,22(2): 245-251 DOI： 10.3788/OPE.20142202.0245.

LUO Ying, TAN Pei-yan, LIU Lin etc. Improvement of exposure performance of linear array CIS camera by twotrigger method[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 245-251 DOI： 10.3788/OPE.20142202.0245.

摘要

针对外触发接触式图像传感器(CIS)线阵相机的扫描图像灰度值受外触发信号频率变化影响的问题

提出了一种新的曝光控制方法——二次触发法。首先

分析了外触发信号频率变化对图像灰度值影响的原因。然后

介绍了二次触发法:该方法将一个外触发信号转变为两次触发信号

第一次触发信号用于控制曝光

第二次触发信号用于控制CIS输出数据。最后

从理论上说明了该方法可以提升图像质量。将该方法成功应用于1.6 m长线阵零畸变CIS相机

实验结果表明:在不同的触发频率下

扫描图像的灰度值波动范围减小了75%

消除了图像上的横条纹。在智能视觉十字绣数码喷印机的应用上

绣布上1 mm×1 mm的孔成像清晰、灰度值均匀。提出的方法有效地解决了外触发信号频率影响图像质量的问题

成功地提高了图像的质量。

Abstract

As the frequency changing of external trigger signal from an external trigger Contact Image Sensor( CIS) camera will cause the nonuniform of a scanned image gray value

a new exposure method——two-trigger method was proposed. First

the reason that the frequency changing of external trigger signal affects the image gray value was analyzed. Then

the two-trigger method was introduced. With the method

an external trigger signal was converted to two trigger signals

the first one was used to control the exposure and the second one was used to control the CIS to output data. Finally

it explained that the method can improve the image quality theoretically. A 1.6 meter non-distortion long-term array CIS camera was fabricated based on this method. The experimental results show that the fluctuation range of scanned image gray value is reduced by 75%

and the horizontal stripes on the image is eliminated at different trigger frequencies. When it is applied to an intelligent vision stitch digital printing machine

the image of 1 mm×1 mm hole in the embroidered cloth is clear. It concludes that the proposed method reduces the effect of the frequency changing of external trigger signal on images effectively and improves the image quality successfully.

关键词

Keywords

references

王旭东, 叶玉堂, 陈东明, 等. 基于 FPGA 与 CIS 的高速高精度图像采集系统[J]. 电子测量技术, 2010(9):63-69.

WANG X D, YE Y T, CHEN D M, et al.. High-speed and high-precision image acquisition system based on FPGA and CIS[J]. Electronic Measurement Technology, 2010(9):63-69. (in Chinese)

吴璐璐, 王元庆. CIS采集纸币图像的冠字符处理[J]. 传感器与微系统, 2012, 31(11): 43-46.

WU L L, WANG Y Q. Processing of crown character on paper currency image captured by CIS[J]. Sensor and Microsystem,2012, 31(11): 43-46.(in Chinese)

康宁, 王元庆. 基于FPGA和DSP的人民币图像鉴别平台设计[J]. 电子技术应用, 2012, 38(12): 20-22.

KANG N, WANG Y Q. Design of bank note image identification platform based on FPGA and DSP[J]. Application of Electronic Technique, 2012, 38(12): 20-22.(in Chinese)

SATO S, OKADA Y, AZUMA T. Real-time computational camera system for high-sensitivity imaging by using combined long/short exposure[J]. SPIE, 2012, 8296:25-34.

PILLMAN B, JASINSKI D. Camera exposure determination based on a psychometric quality model[J]. Journal of Signal Processing Systems, 2011, 65(2): 147-158.

徐文, 苟巧云, 黄泽文. 机器视觉中的一种简单的自动曝光算法[J]. 机电工程技术, 2012, 41(3): 51-54.

XU W, GOU Q Y, HUANG Z W. A simple automatic exposure algorithm in machine vision [J]. Mechanical and Electrical Engineering Technology,2012, 41(3): 51-54.(in Chinese)

陈绕青, 曹国, 毛志红, 等. 一种空间面阵CCD成像的曝光时间计算方法[J]. 计算机工程, 2012, 38(12):7-10.

CHEN R Q, CAO G, MAO ZH H, et al.. Computation method of exposure time for space array CCD Imaging [J]. Computer Engineering, 2012, 38(12):7-10. (in Chinese)

朱均超, 刘铁根, 王双. 一种接触式图像传感器非均匀性实时校正方法[J]. 光电子·激光, 2007,18:1036-1038.

ZHU J CH, LIU T G,WANG SH. New method for real-time correcting the non-uniformity of seal image[J]. Journal of Optoelectronics·Laser, 2007,18:1036-1038.(in Chinese)

KIM J. Color correction device for correcting color distortion and gamma characteristic: U.S. Patent, 5949496[P]. 1999-9-7.

吴厚德, 许文海. 多输出 CCD 接缝的校正[J]. 光学精密工程, 2013, 21(2): 454-461.

WU D H, XU W H. Correction of seams for multiple output CCD [J]. Opt. Precision Eng., 2013, 21(2): 454-461.(in Chinese)

王文华, 何斌, 韩双丽, 等. 星上 CCD 成像非均匀性的实时校正[J]. 光学精密工程, 2010, 18(6): 1420-1428.

WANG W H, HE B, HAN SH L, et al.. Real-time correction of nonuniformity in CCD imaging for remote sensing[J]. Opt. Precision Eng., 2010, 18(6): 1420-1428.(in Chinese)

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