中国科学院机构知识库网格系统: 检索

Calibration of Photoelectric Response Characteristics of a Scientific Grade Charge-coupled Device (CCD) Camera Based on Wedge Interference 期刊论文 OAI收割
LASERS IN ENGINEERING, 2018, 卷号: 41, 期号: 43103, 页码: 129-137
作者: Lin, H.; Da, Z-S.

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收藏 | 浏览/下载：31/0 | 提交时间：2018/10/23

Laser Beam Charge-coupled Device (Ccd) Camera Inertial Confinement Fusion (Icf) Wedge Interference Linear Dynamic Range Nonlinearity Property Scientific Grade

Two-dimensional reference large-field transfer method by linear CCD 期刊论文 OAI收割
journal of applied optics, 2016, 卷号: 37, 期号: 4, 页码: 584-589
作者: Xi Chao; Deng Nianmao; Wang Haiqing; Xiao Maosen; Lu Weiguo

收藏 | 浏览/下载：31/0 | 提交时间：2016/11/23

optical measurement large field splicing linear CCD N shape light source

Research on the Method of Transient Spectrum Detection Based on Array CCD 期刊论文 OAI收割
spectroscopy and spectral analysis, 2012, 卷号: 32, 期号: 4, 页码: 1028-1031
作者: Zhu Bing-li; Bai Yong-lin; Wang Bo; Liu Bai-yu; Ouyang Xian

收藏 | 浏览/下载：25/0 | 提交时间：2015/07/02

Linear CCD Array CCD CCD high speed imaging Transient spectrum detection

Comparison and simulation of subpixel imaging modes for linear CCD (EI CONFERENCE) 会议论文 OAI收割
2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China
作者: Li Y.; He B.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Subpixel technique of linear CCD is effective to enhance the spatial resolution without increasing the focal length of optics and reducing the pixel size. To compare image quality of two main subpixel imaging modes quincunx sampling and four-point sampling a method to quantitatively evaluate image quality of subpixel based on MTF was proposed. The MTF of quincunx and four-point sampling modes were derived. Analytical results shows that theoretical limiting resolution of quincunx sampling and four-point sampling is improved to 1.4 and 1.86 times respectively and MTF values at Nyquist frequency of two modes are increased by 0.1106 and 0.1679 respectively. MTFA in (0 0.5) of two subpixel imaging modes were calculated and results illustrates that four-point sampling offers much more improvement with image quality than quincunx sampling at the cost of double amount of data. A model for simulating subpixel imaging using Matlab was established and simulation results of spoke target verify the theoretical analysis. (2012) Trans Tech Publications Switzerland.

A brightness and color correction method of LED display based on CCD camera (EI CONFERENCE) 会议论文 OAI收割
2012 International Applied Mechanics, MechatronicsAutomation and System Simulation Meeting, AMMASS 2012, June 24, 2012 - June 26, 2012, Hangzhou, China
作者: Wang R.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

The correction methods of LED displays are aiming to address the uniform issues which includes brightness aspect and color aspect. The correction method use a 33 correction coefficients matrix to reshape the pulse width of each LED. To calculate the correction coefficients a linear system is established which includes a color CCD and a LED display. And a correction algorithm is introduced based on the color CCD. This algorithm describes the relationships of the main color components of a LED when the gray level of a LED is increasing or decreasing the three main color components would change according to the correction coefficients. The results shows that the correction based on this algorithm improved the performance of LED displays. (2012) Trans Tech Publications Switzerland.

Real-Time Measurement of Detonation Transient Temperature 期刊论文 OAI收割
spectroscopy and spectral analysis, 2011, 卷号: 31, 期号: 11, 页码: 3060-3063
作者: Zheng Jin-kun; Bai Yong-lin; Wang Bo; Liu Bai-yu; Yang Wen-zheng

收藏 | 浏览/下载：29/0 | 提交时间：2012/06/29

Mechanics of explosion Detonation temperature FPGA High-speed linear CCD Multi-wavelength temperature measurement

Study on supper resolution reconstruction based on staggered arrays (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
Yuan Z.; Xing Z.; Guang J.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

The image resolution can be improved without increasing the requirement to optical imaging systems' parameters and decreasing the size of CCD pixel by staggered arrays technology which arranges several CCDs in a specific mode. In this paper an image super resolution method of improving the image resolution for 1.5 times both in two directions by 4 linear arrays staggered based on this technology is presented which avoids the large computation in a single time by use of circulation method. This method is proved effective by the digital simulation and a simulated experiment platform is constructed to test its feasibility. The image resolution is improved for 1.42 times of the unreconstructed image according to the imaging experiment of resolution chart which is closed to 1.5 times in ideal case. And also the reconstructed and unreconstructed images are evaluated by the image information entropy which proves that the reconstructed image contains more information. 2011 IEEE.

Optical system design of a two-linear array stereoscopic mapping CCD camera 期刊论文 OAI收割
chinese journal of lasers, 2011, 卷号: 38, 期号: 8, 页码: 081600
ChangLingying; ZhaoBaochang; YangJianfeng; WenDesheng

收藏 | 浏览/下载：26/0 | 提交时间：2012/06/29

optical design CCD camera two-linear array time delay integlation CCD

Method of improving the accuracy of image motion measurement for panoramic aerial cameras (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者: Jia P.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

To improve the accuracy of image motion measurement for panoramic aerial cameras the paper proposed a method of real-time image motion measurement based on 2D spatial correlation. An auxiliary area CCD is positioned paralleled to the main linear TDI CCD in the focal plane of the camera. For every frame of the image sequence taken by the auxiliary CCD a prediction on the displacement of the current image in the flight direction is made based on the forward image motion velocity. The current and the reference images are combined together for 2D-correlation which products an image motion vector. By decomposing the vector both the forward and pendulum-swing image motions can be determined. The demanding computational requirements for the real-time 2D-correlation are covered by a joint transform optical correlator. Simulation test results show that the accuracy is improved and the measurement error is within 0.2 pixels for input images with SNR=1 dB. 2010 Copyright SPIE - The International Society for Optical Engineering.

Panoramic aerial camera image motion measurement using a hybrid system (EI CONFERENCE) 会议论文 OAI收割
2010 3rd IEEE International Conference on Computer Science and Information Technology, ICCSIT 2010, July 9, 2010 - July 11, 2010, Chengdu, China
作者: Jia P.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

Image motion compensation is significantly important for aerial camera photograph. To execute the compensation we must determine the image motion exactly. This paper proposes a method of real-time image motion measurement for panoramic aerial cameras based on image processing using a hybrid system. Two cameras are simultaneously used in the hybrid system. One main linear CCD for imaging while the other auxiliary low resolution high frame rate area CCD for determining the image motion based on 2D spatial correlation. The demanding computational requirements for the real-time 2D spatial correlation are covered by a joint transform optical correlator. Simulation test results show that the accuracy is improved and the measurement error is within 0.2 pixels for input images with SNR=1 dB. 2010 IEEE.