中国科学院机构知识库网格系统: 检索

Statistical Scene-Based Non-Uniformity Correction Method with Interframe Registration 期刊论文 OAI收割
Sensors, 2019, 卷号: 19, 期号: 24, 页码: 12
作者: B.Lv; S.F.Tong; Q.Y.Liu; H.J.Sun

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收藏 | 浏览/下载：7/0 | 提交时间：2020/08/24

statistical scene,non-uniformity correction,fixed-pattern noise,adaptive,registration method,correction algorithm,plane,Chemistry,Engineering,Instruments & Instrumentation

Design of a high frame rate driver circuit for a 22 M-pixel high-resolution large-area array CCD camera and its nonuniformity correction 期刊论文 OAI收割
Optical Engineering, 2019, 卷号: 58, 期号: 8, 页码: 14
作者: H.Ren; T.T.Hu; Y.L.Song; M.H.Gao

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收藏 | 浏览/下载：36/0 | 提交时间：2020/08/24

full-frame array CCDFTF4052M,high-frequency frame,driver circuit,nonuniformity correction,two-point correction algorithm,Optics

Measurement of rotationally symmetric aspherical surfaces with the annular subaperture stitching method 期刊论文 OAI收割
Applied Optics, 2019, 卷号: 58, 期号: 26, 页码: 7073-7079
作者: L.S.Yan; D.Y.Zhu; X.K.Wang; M.Li; X.F.Zeng

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收藏 | 浏览/下载：17/0 | 提交时间：2020/08/24

retrace error-correction，algorithm，Optics

Experimental study on subaperture stitching testing of convex hyperboloid surface 期刊论文 OAI收割
Optics Communications, 2018, 卷号: 428, 页码: 104-109
作者: Zhu, D. Y.; Yan, L. S.; Wang, X. K.; Li, M.; Ma, D. L.

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收藏 | 浏览/下载：6/0 | 提交时间：2019/09/17

Interferometry Convex aspheric surfaces Stitching Non-null testing retrace error-correction aspheric surfaces large flat algorithm reconstruction Optics

Fast correction approach for wavefront sensorless adaptive optics based on a linear phase diversity technique 期刊论文 OAI收割
Applied Optics, 2018, 卷号: 57, 期号: 7, 页码: 1650-1656
作者: Yue, D.; Nie, H. T.; Li, Y.; Ying, C. S.

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收藏 | 浏览/下载：12/0 | 提交时间：2019/09/17

aberration correction algorithm system Optics

Transitional compensation algorithm for correcting non-uniformity of LED display image (EI CONFERENCE) 会议论文 OAI收割
2012 2nd International Conference on Materials Science and Information Technology, MSIT 2012, August 24, 2012 - August 26, 2012, Xi'an, Shaan, China
Su W.-x.; Chen Y.-s.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

In order to solve the problem of high non-uniformity of LED display images which is caused by the edges of LED display panel during module splicing transitional compensation algorithm is proposed by improving the existed correction technique named the correction technique based on CCD. First introduce the three development stages of the LED display panel. Then the realization progress of the transitional compensation algorithm is described in detail after elaborating the principle of transitional compensation. Finally the algorithm is emplaned in a LED video control system to control the LED display panel whose display area is 1280960 and which is spliced by 3020 LED modules whose size are 6432. Experimental results show that this algorithm is able to reduce non-uniformity of LED display images from 29.3% before correcting to 0.95%. (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：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 algorithm of LED display image based on composed correction (EI CONFERENCE) 会议论文 OAI收割
International Conference on Advances in Computer Science, Environment, Ecoinformatics, and Education, CSEE 2011, August 21, 2011 - August 22, 2011, Wuhan, China
Song X.-J.; Ma X.-Q.; Liu W.-Y.; Zheng X.-F.

收藏 | 浏览/下载：10/0 | 提交时间：2013/03/25

In order to enhance the display result of the LED display image an improved algorithm of LED display image based on composed correction is proposed. Firstly the correction principle and the development status of the current correction technologies of the LED display image is introduced and the two main correction technologies are analyzed. Secondly the theory of composed correction is proposed by constructing a mathematical model. Thirdly this algorithm is achieved in VHDL which is one of hardware description language and verified in an experimental platform. Experimental results show that this algorithm is able to enhance the display result of the LED display image significantly. 2011 Springer-Verlag Berlin Heidelberg.

Correction of the non-uniformity for multi-TDICCD mosaic camera on FPGA (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on E-Product E-Service and E-Entertainment, ICEEE2010, November 7, 2010 - November 9, 2010, Henan, China
Zhu H.; Xue X.; Ma T.; Li H.; Si G.; Guo Y.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

To solve the non-uniformity problem of multi Time Delay Integral Charge Couple Device (TDICCD) mosaic camera several common non-uniformity correction methods are discussed. Secondly a non-uniformity correction algorithm is proposed and implemented on Field-Programmable Gate Array (FPGA) platform. Firstly the correction algorithm is designed. Finally the generation and definition of non-uniformity are introduced considering the fix-point processing ability of FPGA the correction algorithm is optimized properly and implemented on FPGA. The experimental results indicate that the non-uniformity can be decreased from 8.3%to 2.0% in 1s for 3-TDICCD mosaic camera's images with the proposed correction algorithm at 96TDI stage proving that this correction algorithm is of high real-time performance good practicality and satisfies the requirements of the target system. 2010 IEEE.

Method of auto multi-exposure for high dynamic range imaging (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Piao Y.; Xu W.

收藏 | 浏览/下载：12/0 | 提交时间：2013/03/25

This paper proposes a method for calculating the multi-exposure times fast and accurately when the scene has a high dynamic range minimizing the pictures needed to take and improving the dynamic range of the CCD system. The proposed method first measures the camera's response function referring [10]. After that the median value of the output picture is adjusted to be in the middle range of the system output by changing the exposure time. It can be inferred from the histogram of the current picture whether it's a high dynamic range scene by calculating the number of pixels under exposed and over exposed. Once again the under and over exposed pixels are adjusted to be in the middle according to the camera's response function. Finally different exposed pictures (2 or 3) are fused together by Gaussian function and the dynamic range is compressed by y correction. Experimental results on UNIQ-UM400 analog camera and a digital acquisition system show that the algorithm works well and solve the problem of low dynamic range of CCD camera. 2010 IEEE.