利用DMD获取高动态范围图像技术

吕涛; 付东辉; 陈小云; 刘杰

doi:doi:10.3788/co.20150804.0644

中国光学, 2015, 8 (4): 644, 网络出版: 2016-01-25

利用DMD获取高动态范围图像技术

High dynamic range imaging technology using DMD

论文大纲

吕涛 ^*付东辉陈小云刘杰

作者单位

中国科学院长春光学精密机械与物理研究所, 吉林长春 130033

成像系统高动态范围图像数字微镜器件调光 imaging system high dynamic range image digital micro-mirror device dimming

摘要

高动态范围的图像可用于同时探测具有较大对比度的亮暗目标, 利用数字微镜(DMD)获取高动态范围图像是目前最为先进的一种技术。本文在分析DMD工作原理的基础上, 设计了一种像素级的高动态范围图像获取系统, 该系统由光学系统、机械系统、DMD像素级调光算法及成像单元组成。光学系统采用二次成像光路, 其中第一次成像物镜采用像方远心光路, 第二次成像的转置镜头采用放大倍率近似1∶1的准对称结构, 机械系统采用光学元件的包边设计和定心车工艺, 达到秒级的光学装配精度; DMD像素级调光算法采用搜索单个微镜像素在图像帧周期间的控制权值实现, 成像单元可同时兼顾科学级12 bit sCMOS和8 bit CCD, 设计完成的原理样机验证了系统设计的正确性, 其获取的图像动态范围可达140 dB以上, 远高于传统摄像机78 dB的动态范围。

Abstract

In some scenarios, very bright objectives and very dark objectives exist at the same time. The traditional imaging device can not detect these objectives, and then high dynamic range image acquiring system is needed to detect them. Digital Micro-mirror Devices(DMD) is used to get high dynamic range image, which is the most advanced technology at present. In this paper, a pixel level high dynamic range imaging system is designed based on DMD. The system is composed of optical system, mechanical system, DMD pixel level dimming algorithm and imaging unit. The secondary imaging system is used in the optical system. The first imaging optical structure is image space telecentric system, and the second imaging optical structure is magnification 1: 1 quasi-symmetric system. Wrapping technology of optical elements and centering machining process are used in mechanical system, and the optical assembly precision reaches second level. The method searching for single DMD pixel's controlling weight is used in dimming algorithm. The science class 12 bit sCMOS and 8 bit CCD can be used simultaneously in imaging unit. The correctness of the system is proved by the prototype. The image dynamic range can reach 140 dB, much higher than 78 dB dynamic range of traditional cameras.

参考文献

[1] 王忠立, 赵清洁.高动态图像获取技术[J].光学技术, 2006, 32(8): 279-282.

WANG ZH L,ZHAO Q J. Technology of high dynamic range image reconstruction[J]. Optical Technique, 2006,32(8): 279-282.(in Chinese)

[2] ROBERTSON M A, BORMAN S, STEVENSON R L. Estimation-theoretic approach to dynamic range enhancement using multiple exposures[J]. J. Electron. Imaging,2003,12(2): 219-228.

[3] GOSHTASBY A A. Fusion of multi-exposure images[J]. Image and Vision Computing,2005, 23(6): 611-618.

[4] SZELISKI R. System and process for improving the uniformity of the exposure and tone of a digital image: US,6687400[P], 2004-02-03.

[5] 吕振伟, 刘伟奇, 魏忠伦, 等.基于DMD的高动态范围成像光学系统设计[J].红外与激光工程, 2014, 43(4): 1167-1171.

LV ZH W,LIU W Q,WEI ZH L,et al. Design of high dynamic range imaging optical system based on DMD[J]. Infrared and Laser Engineering,2014,43(4): 1167-1171.(in Chinese)

[6] 王延杰, 陈怀章, 刘艳滢, 等.数字微镜器件在高动态辐射场景成像探测系统中的应用[J].光学精密工程, 2014, 22(9): 2508-2517.

WANG Y J,CHEN H Z,H LIU Y Y,et al.. Application of DMD to high dynamic scene image detection system[J]. Opt. Precision Eng.,2014,22(9): 2508-2517.(in Chinese)

[7] 陈怀章, 王延杰, 孙宏海, 等.DMD结合图像传感器的高动态场景成像探测[J].红外与激光工程, 2013, 42(12): 3402-3409.

CHEN H ZH,WANG Y J,SUN H H,et al.. High dynamic range imaging detection based on DMD and image sensor[J]. Infrared and Laser Engineering,2013,42(12): 3402-3409.(in Chinese)

[8] 余卿, 余晓芬, 崔长彩, 等.并行共焦测量中的并行光源技术综述[J].中国光学, 2013, 6(5): 652-659.

YU Q,YU X F,CUI CH C. Survey of parallel light source technology in parallel confocal measurment[J]. Chinese Optics,2013,06(05): 652-659.(in Chinese)

[9] 李卓, 钱丽勋, 李平, 等.动态红外场景生成技术及其新进展[J].红外与激光工程, 2011, 40(3): 377-383.

LI ZH,QIAN L X,LI P,et al.. Technologies of dynamic infrared scene projection and its new development[J]. Infrared and Laser Engineering,2011,40(3): 377-383.( in Chinese)

[10] 彭进业, 金浩强, 石剑虹, 等.高速单像素相机数据采集系统[J].光学精密工程, 2014, 22(04): 837-843.

PENG J Y,JIN H Q,SHI J H,et al.. Data acquisition system for hing speed single-pixel camera[J]. Opt. Precision Eng.,2014,22(4): 837-843.( in Chinese)

[11] 刘华, 卢振武, 熊峥, 等.绝对式光栅尺母尺刻划曝光系统[J].光学精密工程, 2014, 22(7): 1814-1819.

LIU H,LU ZH W,XIONG ZH,et al.. Exposure optical system in lithographic main scale of absolute optical encoder[J]. Optics and Precision Engineering,2014,22(7): 1814-1819.(in Chinese)

[12] SHENG B,NING X,KING W C L,et al.. Design and Implementation for image Reconstruction of Compressive Sensing Using FPGA[C]. Proceedings of the 2013 IEEE International Conference on Cyber Technology in Automation,Control and Intelligent Systems．Nanjing,China,2013: 320-325.

[13] ICHIKAWA A,ARAI F,FUKUDA T. Optical temperature control of multiple microheaters using digital micromirror device[C]. IEEE MEMS 2006, Istanbul,Turkey,2006: 390-393.

[14] REFAI H H,DAHSHAN M H,SLUSS J J. Precise Control over the individual DMD micromirror for volumetric three-dimensional display application[C]. IEEE 3DTV-CON′08, Istanbul,Turkey,2008: 297-300.

[15] NAYAR S K,BRANZOI V,BOULT T E. Programmable imaging using a digital micromirror array[C]. IEEE CVPR′04, Washington,DC USA,2004.

[16] ZHANG H D,FIORITO R B,SHKVARUNETS A G,et al.. Beam halo Imaging with a digital optical mask[J]. Physical Review Special Topics- accelerator and Beams, 2012, 15(072803): 1-15.

[17] RIDDICK B C,MONTGOMERY E J,FIORITO R B,et al.. Photocathode quantum efficiency mapping at high resolution using a digital micromirror device[J]. Physical Review Special Topics- accelerator and Beams, 2013, 16(062802): 1-4.

[18] 邱基斯, 樊仲维, 唐熊忻.超高斯平顶分布光束空间整形技术研究[J].光电子·激光, 2014, 25(2): 233-238.

QIU S J,FAN ZH W,TANG X X. Research on spatial shaping technology of super-Gaussian flat-topped distributed beam[J]. J. Optoelectronics·Laser,2014,25(2): 233-238.

[19] 涂龙, 于锦, 樊仲维, 等.基于数字微镜的并行激光共焦显微检测技术研究[J].激光与光电子学进展, 2013, 50(101702): 1-8.

TU L,YU J,FAN ZH W. Research on the technology of parallel laser confocal microscopy detection based on digital micromirror device[J]. Laser & Optoelectronics Press,2013,50(101702): 1-8.

[20] 艾琪, 陈笑, 田淼, 等.基于数字微镜器件的多通道C波段可调谐光纤激光器[J].光学学报, 2014, 34(4): 0414001-6.

AI Q,CHEN X,TIAN M,et al.．Multi-channel C-band-tunable fiber lasers based on digital-micromirror-device processor[J]. Acta Optica Sinica,2014,34(4): 0414001-6.

吕涛, 付东辉, 陈小云, 刘杰. 利用DMD获取高动态范围图像技术[J]. 中国光学, 2015, 8(4): 644. LV Tao, FU Dong-hui, CHEN Xiao-yun, LIU Jie. High dynamic range imaging technology using DMD[J]. Chinese Optics, 2015, 8(4): 644.

利用DMD获取高动态范围图像技术

关于本站 Cookie 的使用提示

全站搜索

利用DMD获取高动态范围图像技术

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索