中国科学院机构知识库网格系统: 检索

Spectral Analysis of Sky Light Based on Trajectory Clustering 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 卷号: 39, 期号: 4, 页码: 1301-1306
作者: Cai Jiang-hui; Yang Yu-qing; Yang Hai-feng; Luo A-li; Kong Xiao

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收藏 | 浏览/下载：12/0 | 提交时间：2020/03/10

Sky background Trajectory clustering Multi-object fibre spectroscopy LAMOST

Small Infrared Target Detection Based on Weighted Local Difference Measure 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2016, 卷号: 54, 期号: 7, 页码: 4204-4214
作者: Deng, He; Sun, Xianping

收藏 | 浏览/下载：79/0 | 提交时间：2016/07/12

Cloudy-sky background infrared image small target detection weighted local difference measure (WLDM)

The Backgroud Sky Subtraction Around [OIII] Line in LAMOST QSO Spectra 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 卷号: 34, 期号: 11, 页码: 3132-3135
作者: Shi Zhi-xin; Comte, Georges; Luo A-li; Tu Liang-ping; Zhao Yong-heng

收藏 | 浏览/下载：43/0 | 提交时间：2015/09/18

Sky background Sky subtraction Fiber spectroscopic telescope Quasar

The Backgroud Sky Subtraction Around [OIII] Line in LAMOST QSO Spectra 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 卷号: 34, 期号: 11, 页码: 3132-3135
作者:

收藏 | 浏览/下载：14/0 | 提交时间：2016/11/28

Sky background Sky subtraction Fiber spectroscopic telescope Quasar

Lunar exosphere influence on lunar-based near-ultraviolet astronomical observations 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2011, 卷号: 48, 期号: 12, 页码: 1927-1934
作者: Wang, J.; Deng, J. S.; Cui, J.; Cao, L.; Qiu, Y. L.

收藏 | 浏览/下载：102/0 | 提交时间：2017/04/19

Lunar exosphere Sky background Rayleigh scattering Resonance fluorescence Emissive photodissociation Lunar-based Ultraviolet Telescope

Dark Energy 期刊论文 OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2011, 期号: *
作者: Li, M; Wang, Y

收藏 | 浏览/下载：27/0 | 提交时间：2013/05/17

EQUATION-OF-STATE GAMMA-RAY BURSTS HUBBLE-SPACE-TELESCOPE GENERALIZED CHAPLYGIN-GAS DIGITAL SKY SURVEY MICROWAVE BACKGROUND ANISOTROPIES BARYON ACOUSTIC-OSCILLATIONS PROBE WMAP OBSERVATIONS LARGE-SCALE STRUCTURE COSMOLOGICAL CONSTANT PROBLEM

A hybrid median filter for enhancing dim small point targets and its fast implementation (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Multimedia and Signal Processing, CMSP 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China
Yang Q.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

Weak stars and middle altitude orbit satellites or high altitude orbit satellites are presented as dim point targets in images of astronomical observation. They have low intensity and occupy few pixels in image. In most situations the background of sky is always ununiform and there exists pulse noises. Thus results in targets submerging in background noises and low signal noise ratio (SNR). Median filter is an effective method for removing pulse noise. But it can blur image after modifying gray of non-noise pixels when image has low SNR. A hybrid median filter algorithm is proposed to process low SNR dim point targets image. The newly proposed method can suppress the pulse noises also can increase target $SNR$ and does not add extra fake targets. The time complexity of median filter is O(N2)(N is the widow size) and is difficult to implement in hardware. For quasi real time application a fast implementation of our hybrid median filter is proposed to reduce the time complexity to O(N). Experimental results show that the newly proposed algorithm is superior to ordinary median filter and fast median filter by comparing visual effect and performance. 2011 IEEE.

Research on moving target tracking scene simulation technology under battlefield complicated environment based on Vega (EI CONFERENCE) 会议论文 OAI收割
4th International Congress on Image and Signal Processing, CISP 2011, October 15, 2011 - October 17, 2011, Shanghai, China
Wang S.; Wei Y.-J.

收藏 | 浏览/下载：14/0 | 提交时间：2013/03/25

In order to better simulate the real environment of the battlefield which has moving-target and the complicated background and to simulate the tracking process of the target with 3d's simulation. This paper introduce a development platform of the Vega 3d simulation software and how to use the Vega to simulate the complex battlefield background which has the sky the explosion effects in the ground the fly parameters of fighter planes. It reappear a complete process which contains capturing target and tracking target. Experiment indicate that the Vega development platform is convenient and fast and can achieved the design parameters for the task's demands. It also has many advantages that contains repeating the performance of real experiment and reducing the expenses of the military experiment. 2011 IEEE.

Research on infrared dim-point target detection and tracking under sea-sky-line complex background (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Dong Y.-X.; Zhang H.-B.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：111/0 | 提交时间：2013/03/25

Target detection and tracking technology in infrared image is an important part of modern military defense system. Infrared dim-point targets detection and recognition under complex background is a difficulty and important strategic value and challenging research topic. The main objects that carrier-borne infrared vigilance system detected are sea-skimming aircrafts and missiles. Due to the characteristics of wide field of view of vigilance system the target is usually under the sea clutter. Detection and recognition of the target will be taken great difficulties.There are some traditional point target detection algorithms such as adaptive background prediction detecting method. When background has dispersion-decreasing structure the traditional target detection algorithms would be more useful. But when the background has large gray gradient such as sea-sky-line sea waves etc.The bigger false-alarm rate will be taken in these local area.It could not obtain satisfactory results. Because dim-point target itself does not have obvious geometry or texture feature in our opinion from the perspective of mathematics the detection of dim-point targets in image is about singular function analysis.And from the perspective image processing analysis the judgment of isolated singularity in the image is key problem. The foregoing points for dim-point targets detection its essence is a separation of target and background of different singularity characteristics.The image from infrared sensor usually accompanied by different kinds of noise. These external noises could be caused by the complicated background or from the sensor itself. The noise might affect target detection and tracking. Therefore the purpose of the image preprocessing is to reduce the effects from noise also to raise the SNR of image and to increase the contrast of target and background. According to the low sea-skimming infrared flying small target characteristics the median filter is used to eliminate noise improve signal-to-noise ratio then the multi-point multi-storey vertical Sobel algorithm will be used to detect the sea-sky-line so that we can segment sea and sky in the image. Finally using centroid tracking method to capture and trace target. This method has been successfully used to trace target under the sea-sky complex background. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Extracting sea-sky-line based on improved local complexity (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
作者: Zhang Y.-F.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

Sea-sky-line extraction under complicated sea-sky background is an important aspect of long-range target tracking research. An algorithm based on improved local complexity is proposed according to the feature that the sky and the sea usually show up at different gray levels in sea-sky background images. Median filter is applied first to remove peak noise and then the point set of sea-sky-line region which has the greatest change in image is obtained by calculating the local complexity of image and selecting a segmentation threshold. Finally Hough transform is used to extract the sea-sky-line. The experiment results indicate that this method can extract sea-sky-line under simple and complicated sea-sky backgrounds which is robust and can improve noise immunity of the algorithm. 2010 IEEE.