液晶与显示, 2017, 32 (3): 240, 网络出版: 2017-03-29   

高动态科学级CMOS相机设计与成像分析

Design and imaging analysis of high dynamics scientific CMOS camera
作者单位
1 中国科学院 长春光学精密机械与物理研究所, 吉林 长春 130033
2 北方自动控制技术研究所, 山西 太原 030006
3 中国科学院大学, 北京 100049
摘要
为了满足高动态范围高灵敏度的全局曝光模式下成像系统的需求, 基于CIS-2521科学级CMOS图像传感器设计了一个相机系统, 通过分析CIS-2521芯片像素读出结构特点, 通过芯片内部模拟相关双采样与FPGA片内数字域相关双采样完成相关四采样算法, 列向噪声去除效果明显。通过设计曲线拟合双增益通道图像数据合成输出, 保证了系统成像有较高输出动态范围。相机常温下输出图像峰值信噪比达62.9 dB,采用半导体制冷后输出图像峰值信噪比74.3 dB。根据EMVA1288标准实测相机动态范围达到78.2 dB, 设计的相机系统实现了每秒50帧2 560×2 160像素,16 bit深度高清晰度高动态范围图像的实时全局曝光成像输出, 能够满足低照度条件下的高帧频高动态范围成像的需求。
Abstract
In order to satisfy the demand of the imaging system under the global exposure mode of high dynamic range and high sensitivity, we designed a camera based on the CIS-2521 scientific CMOS image sensor, implementing the correlated quadruple sampling algorithm in the FPGA by analyzing the feature of CIS-2521’s pixel readout structure and combining its built-in circuit of correlative double sample, and it denoises the vertical noise obviously. The imaging system has higher output dynamic range of the image data by designing a curve matching the double gain channels. The output image peak signal to noise ratio of the camera can reach 62.9 dB under the room temperature, and can reach 74.3 dB using the semiconductor refrigeration. The dynamic range of the camera can reach 78.2 dB according to EMVA1288 standard. The designed camera can realize the global exposed real time imaging output with high definition and high dynamic range for 2 560×2 160 and 16 bits images under 50 fps, and can satisfy the demand of the high frame frequency and high dynamic range under the low brightness.
参考文献

[1] 罗通顶, 李斌康, 郭明安, 等.科学级CCD远程图像采集系统[J].光学精密工程, 2013, 21(2): 496-502.

    LUO T D, LI B K, GUO M A, et al. Remote image acquisition system with scientific grade CCD[J]. Opt. Precision Eng., 2013, 21(2): 496-502. (in Chinese)

[2] 潘明忠, 刘玉娟, 陈少杰, 等.中阶梯光栅光谱仪CCD相机的设计[J].光学精密工程, 2012, 20(8): 1725-1731.

    PANG M Z, LIU Y J, CHEN S J, et al. Design of echelle spectrograph CCD camera[J]. Opt. Precision Eng., 2012, 20(8): 1725-1731. (in Chinese)

[3] 刘新明, 刘文, 刘朝晖.大面阵CMOS APS相机系统的设计[J].光子学报, 2009, 38(12): 3235-3239.

    LIU X M, LIU W, LIU Z H. Design of a lagre area array CMOS APS camera system[J]. Acta Photon. Sin., 2009, 38(12): 3235-3239. (in Chinese)

[4] 李云飞, 司国良, 郭永飞.科学级CCD相机的噪声分析及处理技术[J].光学精密工程, 2005, 13(S1): 158-163.

    LI Y F, SI G L, GUO Y F. Noise analyzing and processing for scientific grade CCD camera[J]. Opt. Precision Eng., 2005,13(S1): 158-163. (in Chinese)

[5] 杨东来, 胡晓东, 李俊娜.基于CMOS图像传感器的多斜率积分模式[J].红外与激光工程, 2012, 41(6): 1499-1502.

    YANG D L, HU X D, LI J N. Multiple slope integration based on CMOS image sensor[J]. Infrared Laser Eng., 2012, 41(6): 1499-1502. (in Chinese)

[6] 龚学艺, 黄思婕, 曲荣升, 等.CMOS图像传感器时间域噪声分析及其应用研究[J].光学与光电技术, 2013, 11(1): 86-90.

    GONG X Y, HUANG S J, QU R S, et al. Time domain noise analysis of CMOS image sensor and its application[J]. Opt. Optoelectron. Technol. 2013, 11(1): 86-90. (in Chinese)光学与光电技术|2013|11|1|86-90

[7] 杨涛, 吴孙桃, 郭东辉.CMOS图像传感器电路噪声分析[J].厦门大学学报: 自然科学版, 2012, 51(3): 321-326.

    YANG T, WU S T, GUO D H. Analysis of noise behavior in CMOS image sensor[J]. J. Xiamen Univ. Nat. Sci., 2012, 51(3): 321-326. (in Chinese)

[8] 付贤松.CMOS图像传感器动态范围扩展技术的研究[D].天津: 天津大学, 2006.

    FU X S. Study on techniques to enhance the dynamic range of CMOS image sensors[D]. Tianjin: Tianjin University, 2006. (in Chinese)

[9] 刘春香, 郭永飞, 李宁, 等.多通道航天相机内部的图像实时合成压缩[J].吉林大学学报: 工学版, 2013, 43(6): 1680-1684.

    LIU C X, GUO Y F, LI N, et al. Real-time composing and compression of image within multi-channel spaceborne camera[J]. J. Jilin Univ. : Eng. Technol. Ed., 2013, 43(6): 1680-1684. (in Chinese)

[10] 魏巍, 李志慧, 赵永华, 等.基于智能相机的混合交通流检测方法[J].吉林大学学报: 工学版, 2013, 43(4): 866-870.

    WEI W, LI Z H, ZHAO Y H, et al. Developing a smart camera for mixed traffic flow detection[J]. J. Jilin Univ. : Eng. Technol. Ed., 2013, 43(4): 866-870. (in Chinese)

[11] 和文娟.CMOS图像传感器的噪声分析及图像处理[D].武汉: 华中科技大学, 2011.

    HE W J. Noise analysis and image processing of CMOS image senso[D]. Wuhan: Huazhong University of Science and Technology, 2011. (in Chinese)

[12] 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 Laser Eng., 2013, 42(7): 1928-1932. (in Chinese)

[13] 刘智, 柴华, 李娜娜.CMOS图像传感器中卷帘式快门特性及其应用[J].光学精密工程, 2009, 17(8): 2017-2023.

    LIU Z, CHAI H, LI N N. Shutter mode of CMOS image sensor and its application[J]. Opt. Precision Eng., 2009, 17(8): 2017-2023. (in Chinese)

[14] European Machine Vision Association. EMVA Standard 1288 Release 3.0 Standard for characterization of image sensors and cameras[DB/OL]. (2010-11-29). http: //www.emva.org/wp-content/uploads/EMVA1288-3.0.pdf.

孙宏海, 何舒文, 吴培, 王延杰. 高动态科学级CMOS相机设计与成像分析[J]. 液晶与显示, 2017, 32(3): 240. SUN Hong-hai, HE Shu-wen, WU Pei, WANG Yan-jie. Design and imaging analysis of high dynamics scientific CMOS camera[J]. Chinese Journal of Liquid Crystals and Displays, 2017, 32(3): 240.

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