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长春光学精密机械与... [10]
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Low-cost biometric recognition system based on NIR palm vein image
期刊论文
OAI收割
IET BIOMETRICS, 2019, 卷号: 8, 期号: 3, 页码: 206-214
作者:
Wu, Wei
;
Elliott, Stephen John
;
Lin, Sen
;
Yuan, Weiqi
  |  
收藏
  |  
浏览/下载:24/0
  |  
提交时间:2021/02/02
feature extraction
biometrics (access control)
vein recognition
image recognition
low-cost biometric recognition system
NIR palm vein image
high security
liveness detection
palm vein capture devices
practical palm vein recognition system
authors
(NIR) palm vein image
complementary metal-oxide-semiconductor camera
NIR charge-coupled device camera
discriminate palm vein features
recognition accuracy
1500 palm vein images
capture device
Low-cost biometric recognition system based on NIR palm vein image
期刊论文
OAI收割
IET BIOMETRICS, 2019, 卷号: 8, 期号: 3, 页码: 206-214
作者:
Lin S(林森)
;
Yuan, Weiqi
;
Elliott, Stephen John
;
Wu W(吴微)
  |  
收藏
  |  
浏览/下载:23/0
  |  
提交时间:2019/05/12
feature extraction
biometrics (access control)
vein recognition
image recognition
low-cost biometric recognition system
NIR palm vein image
high security
liveness detection
palm vein capture devices
practical palm vein recognition system
authors
(NIR) palm vein image
complementary metal-oxide-semiconductor camera
NIR charge-coupled device camera
discriminate palm vein features
recognition accuracy
1500 palm vein images
capture device
Bavachinin analogues as agonists of pan-peroxisome proliferator-activated receptors
期刊论文
OAI收割
MEDICINAL CHEMISTRY RESEARCH, 2018, 卷号: 27, 期号: 7, 页码: 1851-1862
作者:
Yi, Jingyu
;
Du, Guoxin
;
Zhao, Yuanyuan
;
Zhang, Liuqiang
;
Li, Bo
  |  
收藏
  |  
浏览/下载:43/0
  |  
提交时间:2019/01/08
Bavachinin
Metabolic syndrome
PPARs
Reporter gene assaysThese authors contributed equally: Jingyu Yi, Guoxin Du
A Local Image Enhancement Method Based on Adjacent Pixel Gray Order-preserving Principle
会议论文
OAI收割
5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications, Beijing, June 25-27, 2013
作者:
Fan XP(范晓鹏)
;
Cai TF(蔡铁峰)
;
Zhu F(朱枫)
收藏
  |  
浏览/下载:45/0
  |  
提交时间:2013/12/26
The paper is committed in local image enhancement. At first, the authors propose an adjacent pixel gray order-preserving principle. Adjacent pixel gray order-preserving principle is the basement of local enhancement method which ensures that there is no distortion in processed image. And then, the authors propose an iterative algorithm, which could stretch gray-scale difference of adjacent pixels in premise of not changing gray magnitude relationship between adjacent pixels. At last, the authors propose a totally reference image quality assessment method based on adjacent pixel gray order-preserving principle. According to this quality assessment method, the authors made a set of comparative experiments with local histogram equalization and method. Experimental results show that the proposed enhancement method can get higher score and provide better visual effects, fully demonstrating its effectiveness. According to this quality assessment method, the proposed method shows a good effectiveness, through experimental results and comparison with local histogram equalization method.
Aircraft flight simulation with landing gear based on multi-domain modeling technology (EI CONFERENCE)
会议论文
OAI收割
2012 2nd International Conference on Computer Application and System Modeling, ICCASM 2012, July 27, 2012 - July 29, 2012, Shenyang, China
作者:
Li M.
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2013/03/25
This paper create a full aircraft flight simulation model for accurately analyzing the performance and influence of landing gear system. The use of multi-domain modeling technology enables detailed modeling of the flight dynamic and landing gear dynamic. The simulation results show that the aircraft landing gear system mathematical model established appropriately reflects the change of force and moment in the process of taking off and landing
and it is actual in the physical process. The parameter design space is easily searched by considering a number of different landing scenarios to optimize the design. the authors.
Features extraction and matching of teeth image based on the SIFT algorithm (EI CONFERENCE)
会议论文
OAI收割
2012 2nd International Conference on Computer Application and System Modeling, ICCASM 2012, July 27, 2012 - July 29, 2012, Shenyang, China
作者:
Wang X.
;
Wang X.
;
Wang X.
收藏
  |  
浏览/下载:34/0
  |  
提交时间:2013/03/25
Using of SIFT algorithm in the image of teeth model
can detect the features of the teeth image effectively. In this approach
first
search over all scales and image locations by using a difference-of-Gaussian function to identify potential interest points that are invariant to scale and orientation. Second
select keypoints based on measures of their stability and a detailed model is fit to determine location and scale at each candidate location. Third
assign one or more orientations to each keypoint location based on local image gradient directions. Last
measure the local image gradients at the selected scale in the region around each keypoint. And then use the KNN algorithm to match the features. Through lots of experiments and comparing with other feature extraction methods
this method can detect the features of the teeth model effectively
and offer some available parameters for 3D reconstruction of the teeth model. the authors.
A strong coupled CFD-CSD method on computational aeroelastity (EI CONFERENCE)
会议论文
OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
Xi R.
;
Jia H.
收藏
  |  
浏览/下载:72/0
  |  
提交时间:2013/03/25
In this paper
a strong coupled CFD-CSD method is developed to simulate the aeroelastic phenomena. The CFD solver is based on the finite-volume algorithm for the Navier-Stokes equations on unstructured grid. The CSD solver solves the aeroelastic governing equations in the modal space. Their coupling is realized by a dual-time method. The spring-based smoothing method is adopted to deform and regenerate the aerodynamic grid. Two test cases are selected to validate the authors' method for static and dynamic aeroelastity .The results of the simulation for the static aeroelastic problems of a missile wing show that the Lift Coefficient and Drag Coefficient are severally 7% and 5% lower than those don't consider the elasticity of the wing. The results for the flutter boundary prediction of the AGARD 445.6 wing have been proved much closer to the experiment than using the DLM. This method can describe the effects of fluid viscosity more exactly for highly nonlinear transonic flight conditions. The calculation has proved reliable in the subsonic regime
but not accurate enough in the supersonic regime. 2011 IEEE.
The imaging system design of three-line LMCCD mapping camera (EI CONFERENCE)
会议论文
OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者:
Zhao Y.
;
Yu D.
;
Yu D.
;
Zhao Y.
;
Zhao Y.
收藏
  |  
浏览/下载:21/0
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提交时间:2013/03/25
In this paper
the SNR tested in laboratory is better than 95 under typical working condition(the solar incidence degree is 30
the temperature of the focal plane module is controlled under 30 in a working period of 15 minutes. All of these results can satisfy the requirements about the synchronous photography
the authors introduced the theory about LMCCD (line-matrix CCD) mapping camera firstly. On top of the introduction were consists of the imaging system of LMCCD mapping camera. Secondly
the photography interval of line-matrix CCD of the nadir camera can satisfy the butter requirements of LMCCD focal plane module
the reflectivity of the earth's surface is 0.3) of each CCD image
the temperature control of focal plane module and SNR
some pivotal designs which were Introduced about the imaging system
Which give the guarantee of precision for satellite photogrammetry. 2011 SPIE.
such as the design of focal plane module
the video signal's procession
the controller's design of the imaging system
synchronous photography about forward and nadir and backward camera and the nadir camera of line-matrix CCD. At last
the test results of LMCCD mapping camera imaging system were introduced. The results as following: the precision of synchronous photography about forward and nadir and backward camera is better than 4 ns and the nadir camera of line-matrix CCD is better than 4 ns too
A new method for number recognition based on feature extract (EI CONFERENCE)
会议论文
OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Zhou H.
;
Li G.
;
Xiao C.
;
Hao Z.
收藏
  |  
浏览/下载:32/0
  |  
提交时间:2013/03/25
In this paper
the authors put forward a new method for print number recognition when we research on the OCR (Optical Character Recognition). It's different from the traditional method such as NN (Neural Networks) recognition or model matching. By this method
the number waiting for recognizing was treated as the fingerprint lines
then
defined and extracted the features about the number for recognition. At end of the paper
an experiment result is given.
The packaging technology of optical switch arrays (EI CONFERENCE)
会议论文
OAI收割
ICO20: MEMS, MOEMS, and NEMS, August 21, 2005 - August 26, 2005, Changchun, China
作者:
Chen W.
;
Wang W.
;
Zhao L.
;
Wang W.
;
Wang L.
收藏
  |  
浏览/下载:27/0
  |  
提交时间:2013/03/25
Optical switch is one of key supporting technologies in all-optical-network (AON). And electrostatic MOEMS (Micro-Optical-Electro-Mechanical Systems) switch plays a very important role in all the researched switches
because of their excellent features
including low insertion
low crosstalk and scalability. But the packaging technology has been limiting the development of optical switch. In this paper
the authors study the laser beam propagating during the free space and select collimator
design the pedestal to packaging and address aspects of the insertion loss that are most important loss mechanisms for the 2D cross-connect switch.