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长春光学精密机械与物... [8]
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会议论文 [8]
发表日期
2009 [8]
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发表日期:2009
内容类型:会议论文
专题:长春光学精密机械与物理研究所
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Micro-motion exposure method based on PZT piezoelectric ceramics (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, June 17, 2009 - June 19, 2009, Beijing, China
Sun W.-J.
;
Zhang M.-H.
;
Meng Z.
收藏
  |  
浏览/下载:91/0
  |  
提交时间:2013/03/25
There mainly is laser digital photofinishing technique and digital photofinishing technique based on LCD consisting of TFT and LCOS in the digital photofinishing field at the present time. The former have a good many merit such as wide color gamut
high processing rate
large output size and high brightness
but his cost is very high
his maintain technique being comparatively complex
that result in difficult use for people. The utilization ratio of the latter is low because of lower resolution and lower aperture ratio for LCD
but the digital photofinishing based on LCD have lower cost and higher utilization ration
being suitable for people's current standard of living. Considering above mentioned problem
a micro-motion exposure method based on PZT piezoelectric ceramics used in digital image photofinishing is presented. The two-dimension micro-motion exposure system consisting of PZT piezoelectric ceramics
LCD panel
polarizing film and spring strip is designed. By means of PZT piezoelectric ceramics the LCD panel is removed about the one half of the pixel size of the LCD panel for four times from the original place
at the same time imaging system is exposed four times at the printing paper. The software is used to control the time synchronization
the exposure time and motion range of the LCD panel. The system has advantages such as shorter response time than 0.1seconds
lesser motion error than 0.01 microns
high stability and repeatability. Experimental results show that the proposed micro-motion exposure method improve the picture brightness and enlarge output size
at the meantime reducing the cost of the system. 2009 SPIE.
Real-time matching algorithm of navigation image based on corner detection (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China
Zhang T.
;
Yang L.-M.
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  |  
浏览/下载:39/0
  |  
提交时间:2013/03/25
In order to meet requirement of real-time and high accuracy in image matching aided navigation
SSDA algorithm is used to match remote sensing image and template image coarsely
a fast and effective algorithm of remote sensing image matching based on corner detection is put forward. With the combination of rough and fine match
when the matching result is bigger than one to count absolute value sum of energy difference of characteristic point energy to realize fine match of remote sensing image and template image to locate the position of template image in remote sensing image accurately. Simulation experiment proves that the matching of a remote sensing image resolution of 1018*1530 and a template image resolution of 150*90 can be fulfilled within 2.392 second
wavelet transform is used to acquire low frequency component to realize image compression to decrease calculation work and increase matching speed. Harris corner detection algorithm is used to detect corner of remote sensing image and template image and energy of every corner is calculated
the algorithm is robust and effective
real time image navigation can be achieved. 2009 SPIE.
Spaceborne laser interconnect technology based on human bionics (EI CONFERENCE)
会议论文
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
He X.
;
Jin G.
;
Wang J.
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  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
As a result of comparative study on human visual and Free Space Optical (FSO) communication
a new concept of satellites laser interconnect was proposed based on human bionics. For the laser link is difficult to set up directly
a new concept was given out based on the three processes of human visual capturing the objectives: voice assisting to guide
eyes' wide Field Of View (FOV) cursory capturing and eyes' foveal FOV high-resolution imaging. Three similar processes were introduced to spaceborne laser interconnect which were radio assisting to guide
beacons laser wide FOV capturing and communication laser narrow FOV capturing
so that the difficulty of setting up the optical communication link was reduced evidently. Meanwhile
the antenna optical system based on the bionics was given out. Each laser terminal configured two independent optical antenna
through the spaceborne storage and time-domain link switching
complex topology network could be set up. The simulation system was built using Virtual Reality Toolbox
the result showed that the laser terminal could search and set up communication links
which took about only lOOms from capturing the beacon to setting up communication. 2009 IEEE.
Design of image nonuniformity correction and real-time record for CMOS camera (EI CONFERENCE)
会议论文
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
Huilong Y.
;
Xin H.
;
Zhonghui W.
;
Donghe W.
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  |  
浏览/下载:13/0
  |  
提交时间:2013/03/25
A configurable
record capacity extensible and nonuniformity reducible of high speed camera is designed in this paper. The CMOS image sensor lupa-300 which is produced by Cypress Corporation is used for the system. There is nonuniformity existed in the sensor. The two point method of the image with real time correction algorithm has applied to process the image nonuniformity. Then the corrected image is storied into the NandFlash array. To improve the record speed and extend record capacity
the pipelining and parallel bus mechanism is adopted. The experiment which is based on hardware platform indicates the camera can take about 250f/s at a resolution of 640*480
the consistent storage speed is up to 614.4 Mb/s
consistent transmit from flash to Camera Link speed up to 1.093Gb/s.The system record time is up to 18.6 minutes. 2009 IEEE.
Modeling and analysis of dialyte-lens auto-focusing technology for theodolite (EI CONFERENCE)
会议论文
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Wu L.-T.
;
Qiao Y.-F.
;
Wu D.-K.
;
Cai S.
收藏
  |  
浏览/下载:14/0
  |  
提交时间:2013/03/25
In order to realize real-time auto-focusing for theodolite
lens-apart method was designed with the corresponding math model built and analyzed. An Object beam splitted after the first image surface of the theodolite traveled through two dialyte lens and then was imaged on CCD. The distance between two spots when exactly focused was set as the calibration value
and the relationship between defocus distance and spot offset was given. The influence of tracking center shift and divergence angle etc. on focusing accuracy was analyzed. Compared with the traditional focusing method
this scheme has a higher accuracy
faster calculation
higher tolerance for environment temperature and a simpler construction. The experiment result exhibited a resolution higher than 0.056mm
which shows a bright engineering application prospect for this method. 2009 SPIE.
Contrast research on interpolation and subpixel imaging in CCD geometric superresolution reconstruction (EI CONFERENCE)
会议论文
1st Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics, PrimeAsia 2009, November 19, 2009 - November 21, 2009, Shanghai, China
Xu Z.-P.
;
Ge W.-Q.
;
Yang S.-W.
;
Xu Y.-S.
;
Zhai L.-P.
收藏
  |  
浏览/下载:17/0
  |  
提交时间:2013/03/25
In order to enhance the resolution of Charge Coupled Device (CCD) pixel with the pixel dimension and focal length of optical system unchanged
the problem of CCD geometric superresolution is educed. The problem is discussed in terms of software and hardware. In software
the bicubic interpolation is introduced
while in hardware
the subpixel imaging method is utilized. The subpixel imaging method integrates two uniform linear CCDs staggered by half dimension of pixel in one device. In operation
the line frequency is doubled. At last
the collected data is interweaved to synthesize a high resolution image. The two methods
bicubic interpolation and subpixel imaging
are simulated with Matlab7.0.1. The qualitative and quantitative analyses are given. The simulated results of lanczos and cubic spline interpolation methods are given simultaneously to show the performance of interpolation. The simulation result shows that the result images quality becomes better in both methods
but compared with bicubic interpolation method
the synthesized image PSNR gained from sub-pixel imaging is averagely enhanced by 2.1682dB
while the elapsed time is reduced to be about one forth. The subpixel imaging method could significantly mitigate the image blur introduced by undersample. 2009 IEEE.
Layered fast correlation tracking algorithm combined with target feature (EI CONFERENCE)
会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
Bai Y.
;
Jia H.-G.
;
Guo L.-H.
;
Zhang R.-H.
收藏
  |  
浏览/下载:17/0
  |  
提交时间:2013/03/25
A new correlation tracking algorithm
layered fast correlation tracking algorithm combined with target feature
is proposed for target tracking in image sequences. Based on traditional correlation tracking algorithm
according to resolution of real-time image
the proposed algorithm chooses the designated layer image. At the same time the proposed algorithm uses a new search method combined with the target features to predict matching position
which can improve the matching precision and reduce computational complexity. In addition
the experimental results indicate that the proposed algorithm can overcome the influence of gray mutation and satisfy the requirement of real-time. 2009 SPIE.
A high-speed acquisition and processing system of the laser speckle signal on the magnetic fluid (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
Wan Q.-H.
;
Jiang Y.
;
Su S.-C.
;
Sun Y.
;
Wu Y.-Z.
收藏
  |  
浏览/下载:24/0
  |  
提交时间:2013/03/25
In order to achieve the dynamical detection and real-time analysis of the movement status of the magnetic fluid
according to the difficulties of the detection of the magnetic fluid
established a high-speed acquisition and processing system of laser speckle signal on the magnetic fluid. First of all
the FPGA (EP2C8T144C8N) drived the linear array CCD(TCD1501D) to scan in the corresponding time sequence given by the computer
collected the laser speckle interferometric image in rapid change on the surface of the magnetic fluid
which followed the movement of the magnetic fluid
and the signal collected by CCD was converted into the digital data through the high-speed A/D convertor and stored into the internal buffer FIFO of the FPGA
whose width and depth were designed by the user as required. Then
the FPGA sent the digital signal of the laser speckle interferometric images into the computer through the USB2.0 highspeed differential bus
whose transmission rate can reach 480Mb/s in theory. Finally
the distribution of the laser speckle on the magnetic fluid was messy and random
which carried certain information about the surface of the magnetic fluid
based on the theories of the statistic correlation and the subdivision of images
analysing and processing the laser speckle interferometric images
indirectly got the movement status of the magnetic fluid under the electromagnetic field. The experimental results show that: the High Speed Acquisition and Processing System has the advantage of full-court
non-contact
non-invasive
high-precision and high reliability and so on. The detection resolution of high speed acquisition and processing system is superior to 1m and the sample rate is 3Msps
which basically meets the requirements of the magnetic fluid movement state detection. 2009 SPIE.
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