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Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共7条,第1-7条 帮助

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Efficient spatiotemporal context modeling for action recognition 期刊论文  OAI收割
NEUROCOMPUTING, 2023, 卷号: 545, 页码: 13
作者:  
Cao, Congqi;  Lu, Yue;  Zhang, Yifan;  Jiang, Dongmei;  Zhang, Yanning
  |  收藏  |  浏览/下载:29/0  |  提交时间:2023/11/17
Moon Imaging Technique and Experiments Based on Sanya Incoherent Scatter Radar 期刊论文  OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2022, 卷号: 60, 页码: 14
作者:  
Li, Mingyuan;  Yue, Xinan;  Wang, Yonghui;  Wang, Junyi;  Ding, Feng
  |  收藏  |  浏览/下载:63/0  |  提交时间:2022/07/18
Robust dense reconstruction by range merging based on confidence estimation 期刊论文  OAI收割
SCIENCE CHINA-INFORMATION SCIENCES, 2016, 卷号: 59, 期号: 9
Chen, YD; Hao, CY; Wu, W; Wu, EH
  |  收藏  |  浏览/下载:29/0  |  提交时间:2016/12/09
Adaptive enhancement of sea surface targets in infrared high dynamic range image 会议论文  OAI收割
Conference on Applied Optics and Photonics (AOPC) - Image Processing and Analysis, Beijing, MAY 05-07, 2015
作者:  
Dong S(董帅);  Qi L(亓琳)
收藏  |  浏览/下载:43/0  |  提交时间:2015/11/18
Multi-focus image fusion algorithm based on adaptive PCNN and wavelet transform (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
Wu Z.-G.; Wang M.-J.; Han G.-L.
收藏  |  浏览/下载:92/0  |  提交时间:2013/03/25
Being an efficient method of information fusion  image fusion has been used in many fields such as machine vision  medical diagnosis  military applications and remote sensing.In this paper  Pulse Coupled Neural Network (PCNN) is introduced in this research field for its interesting properties in image processing  including segmentation  target recognition et al.  and a novel algorithm based on PCNN and Wavelet Transform for Multi-focus image fusion is proposed. First  the two original images are decomposed by wavelet transform. Then  based on the PCNN  a fusion rule in the Wavelet domain is given. This algorithm uses the wavelet coefficient in each frequency domain as the linking strength  so that its value can be chosen adaptively. Wavelet coefficients map to the range of image gray-scale. The output threshold function attenuates to minimum gray over time. Then all pixels of image get the ignition. So  the output of PCNN in each iteration time is ignition wavelet coefficients of threshold strength in different time. At this moment  the sequences of ignition of wavelet coefficients represent ignition timing of each neuron. The ignition timing of PCNN in each neuron is mapped to corresponding image gray-scale range  which is a picture of ignition timing mapping. Then it can judge the targets in the neuron are obvious features or not obvious. The fusion coefficients are decided by the compare-selection operator with the firing time gradient maps and the fusion image is reconstructed by wavelet inverse transform. Furthermore  by this algorithm  the threshold adjusting constant is estimated by appointed iteration number. Furthermore  In order to sufficient reflect order of the firing time  the threshold adjusting constant is estimated by appointed iteration number. So after the iteration achieved  each of the wavelet coefficient is activated. In order to verify the effectiveness of proposed rules  the experiments upon Multi-focus image are done. Moreover  comparative results of evaluating fusion quality are listed. The experimental results show that the method can effectively enhance the edge details and improve the spatial resolution of the image. 2011 SPIE.  
Usefulness of Species Range Polygons for Predicting Local Primate Occurrences in Southeastern Peru 期刊论文  OAI收割
AMERICAN JOURNAL OF PRIMATOLOGY, 2011, 卷号: 73, 期号: 1, 页码: 53-61
作者:  
Palminteri S[*];  Powell G;  Endo W;  Kirkby C;  Yu DW
收藏  |  浏览/下载:25/0  |  提交时间:2011/01/29
Design of a scene simulator in land-based aerospace lab with the man-made light source system based on quantum theory (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Devices and Integration II, November 12, 2007 - November 15, 2007, Beijing, China
作者:  
Fang W.;  Yi W.
收藏  |  浏览/下载:46/0  |  提交时间:2013/03/25
The paper presents a method with the technique of combination filtering of spectrum and the technique of DSP control for the simulation and recognition of the spontaneously lightening object and stellar map in the universe. The magnitude and the spectrum of a star can be simulated in a wide dynamic range. We established the mathematical models of the Vega's visible light spectrum and luminous flux density. Tungsten-halogen lamp as a light source is used to fit the linear light of the spontaneously lightening object in the universe. Through the experiment  it shows that the more sub-channels there are while filtering spectrum in the visible spectrum  and the more degrees the variable neutral density filters and the narrow-band attenuators have  more close to the actual spectrum the simulated spectrum is. It is proved that using the PID technique is beneficial to the output of the accurate and steady radiation from the light sources. The experiment shows that the using of this method can get perfect result in fitting and simulating the spectrum  magnitude and the stellar map of the spontaneously lightening object . The analysis of the consistent result and the experimental error is also discussed in detail in this paper.