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Design of inspection system for surface defects on industrial parts under complex background 会议论文
Beijing, China, 2017-06-04
作者:  Wang, Yudan;  Wen, Desheng;  Song, Zongxi
收藏  |  浏览/下载：15/0  |  提交时间：2018/03/07
A brightness and color correction method of LED display based on CCD camera (EI CONFERENCE) 会议论文
2012 International Applied Mechanics, MechatronicsAutomation and System Simulation Meeting, AMMASS 2012, June 24, 2012 - June 26, 2012, Hangzhou, China
Zhao Z.; Wang R.
收藏  |  浏览/下载：15/0  |  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.  
Improved color interpolation method based on bayer image 会议论文
Proceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical System Technologies for Manufacturing and Testing, 2012
作者:  Wang, Jin
收藏  |  浏览/下载：12/0  |  提交时间：2016/11/24
Research and Design of Color Restoration Algorithm for Demosaicing Bayer Pattern Images 会议论文
3rd international conference on mechanical and electronics engineering (icmee 2011), hefei, peoples r china, sep 23-25, 2011
作者:  Wei Gao
收藏  |  浏览/下载：16/0  |  提交时间：2013/06/19
CCD on-chip imaging for smart micro-object and fluorescence imaging system - art. no. 628913 会议论文
Novel Optical Systems Design and Optimization IX, Conference on Novel Optical Systems Design and Optimization IX, San Diego, CA, Web of Science, INSPEC
Qiu, Hongyun; Liu, Yang; Sun, Liqun; Zhang, Enyao; Tian, Qian
收藏  |  浏览/下载：4/0
Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China
Yao C.-B.; Wang S.-Y.; Rong X.-W.; Meng Z.; Sun W.-J.
收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25
A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera  achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique  then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed  at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED  and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65  enhanced chromaticity uniformity of illumination field.  
The system integration of image processing - art. no. 68330F 会议论文
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)
Chen, QX; Wu, QZ; Gao, XD; et al.
收藏  |  浏览/下载：11/0  |  提交时间：2015/05/18
optical system design of multi-spectral and large format color aerial photogrammetric camera 会议论文
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)
钱义先; 孙天祥; 高晓东
收藏  |  浏览/下载：8/0  |  提交时间：2015/05/18
Key Technology in Detecting and Eliminating Isomerism Fibre in Cotton 会议论文
8th International Conference on Electronic Measurement and Instruments, Xian, PEOPLES R CHINA, 2007-08-16
作者:  Li Yujun;  Liang Kun;  Bai HuaYu
收藏  |  浏览/下载：2/0  |  提交时间：2019/12/25
An image identification system of seal with fingerprint based on CMOS image sensor (EI CONFERENCE) 会议论文
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Xue X.-C.; Zhang S.-Y.; Guo Y.-F.
收藏  |  浏览/下载：10/0  |  提交时间：2013/03/25
CMOS image sensors now become increasingly competitive with respect to their CCD counterparts  while adding advantages such as no blooming  simpler driving requirements and the potential of on-chip integration of sensor  analog signal conditioning circuits  A/D converter and digital processing functions. Furthermore  CMOS sensors are the best choices for low-cost imaging systems. An image identification system based on CMOS image sensor is used to identify the seal images that include fingerprint  and then determine whether the seal is fake or not. The system consists of a color CMOS image sensor (OV2610)  a buffer memory  a CPLD  a MCU (P89C61X2)  a USB2.0 interface chip (ISP1581) and a personal computer. The CPLD implement the logic and timing of the system. The MCU and the USB2.0 interface chip deal with the communications between the images acquisition system and PC. Thus PC can send some parameters and commands to the images acquisition system and also read image data from it. The identification of the images of seal is processed by the PC. The structure and scheme of the system are discussed in detail in this paper. Several test images of seal taken by the system are also provided in the paper.  

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