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Chinese Academy of Sciences Institutional Repositories Grid
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CAS IR Grid
机构
长春光学精密机械与物... [3]
地质与地球物理研究所 [1]
自动化研究所 [1]
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OAI收割 [5]
内容类型
会议论文 [3]
期刊论文 [2]
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2020 [2]
2012 [1]
2009 [1]
2006 [1]
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A new fast search algorithm for exact k-nearest neighbors based on optimal triangle-inequality-based check strategy
期刊论文
OAI收割
KNOWLEDGE-BASED SYSTEMS, 2020, 卷号: 189, 页码: 11
作者:
Pan, Yiwei
;
Pan, Zhibin
;
Wang, Yikun
;
Wang, Wei
  |  
收藏
  |  
浏览/下载:53/0
  |  
提交时间:2020/03/30
Exact k-nearest neighbors
Fast search algorithm
Clustering
Triangle inequality
Optimal check strategy
Adaptive step-size fast iterative shrinkage-thresholding algorithm and sparse-spike deconvolution
期刊论文
OAI收割
COMPUTERS & GEOSCIENCES, 2020, 卷号: 134, 页码: 12
作者:
Pan, Shulin
;
Yan, Ke
;
Lan, Haiqiang
;
Badal, Jose
;
Qin, Ziyu
  |  
收藏
  |  
浏览/下载:32/0
  |  
提交时间:2020/05/18
Fast iterative shrinkage-thresholding algorithm
Adaptive step-size algorithm
Linear search approach
Convergence rate
Sparse-spike deconvolution
An auto-focus algorithm of fast search based on combining rough and fine adjustment (EI CONFERENCE)
会议论文
OAI收割
3rd international Conference on Manufacturing Science and Engineering, ICMSE 2012, March 27, 2012 - March 29, 2012, Xiamen, China
作者:
Zhang S.
;
Zhang Y.
收藏
  |  
浏览/下载:32/0
  |  
提交时间:2013/03/25
A coarse and fine combined fast search and auto-focusing algorithm was suggested in this paper. This method can automatically search and find the focal plane by evaluating the image definition. The Krisch operator based edge energy function was used as the big-step coarse focusing
and then the wavelet transform based image definition evaluation function
which is sensitivity to the variation in image definition
was used to realize the small-step fine focusing in a narrow range. The un-uniform sampling function of the focusing area selection used in this method greatly reduces the workload and the required time for the data processing. The experimental results indicate that this algorithm can satisfy the requirement of the optical measure equipment for the image focusing. (2012) Trans Tech Publications.
Layered fast correlation tracking algorithm combined with target feature (EI CONFERENCE)
会议论文
OAI收割
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
作者:
Guo L.-H.
收藏
  |  
浏览/下载:25/0
  |  
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.
Displacement estimation by the phase-shiftings of fourier transform in present white noise (EI CONFERENCE)
会议论文
OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:
Wu Y.-H.
收藏
  |  
浏览/下载:33/0
  |  
提交时间:2013/03/25
Displacement estimation is a fundamental problem in Real-time video image processing. It can be typically approached by theories based on features in spatial domain. This paper presents an algorithm which improves the theory for estimating the moving object's displacement in spatial domain by its Fourier transform frequency spectrum. Because of the characters of Fourier transform
the result is based on all the features in the image. Utilizing shift theorem of Fourier transform and auto-registration
the algorithm employs the phase spectrum difference in polar coordinate of two frame images sequence with the moving target1
2. The method needn't transform frequency spectrum to spatial domain after calculation comparing with the traditional algorithm which has to search Direc peak
and it reduces processing time. Since the technique proposed uses all the image information
including all the white noise in the image especially
and it's hard to overcome the aliasing from noises
but the technique can be an effective way to analyze the result in little white noise by the different characters between high and low frequency bands. It can give the displacement of moving target within 1 pixel of accuracy. Experimental evidence of this performance is presented
and the mathematical reasons behind these characteristics are explained in depth. It is proved that the algorithm is fast and simple and can be used in image tracking and video image processing.