中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共8条，第1-8条

帮助

条数/页：排序方式：
	A WEAK MOVING POINT TARGET DETECTION METHOD BASED ON HIGH FRAME RATE IMAGE SEQUENCES 会议论文 OAI收割 Valencia, SPAIN, JUL 22-27, 2018 作者: Wu, Yong; Yang, Zheng; Niu, Wenlong; Zheng, Wei \| 收藏 \| 浏览/下载：32/0 \| 提交时间：2019/01/31 kernel high frame rate wavelet packet moving point target signal detection
	HIGH FRAME-RATE BASED MOVING POINT TARGET DETECTION 会议论文 OAI收割 Valencia, SPAIN, JUL 22-27, 2018 作者: Niu, Wenlong; Wu, Yong; Zheng, Wei; Yang, Zhen; Vagvolgyi, Balazs \| 收藏 \| 浏览/下载：29/0 \| 提交时间：2019/01/31 Moving point target detection framework time series target detector high frame-rate
	Motion-Blur-Free High-Speed Video Shooting Using a Resonant Mirror 期刊论文 OAI收割 SENSORS, 2017, 卷号: 17, 期号: 11 作者: Inoue, Michiaki; Gu, Qingyi; Jiang, Mingjun; Takaki, Takeshi; Ishii, Idaku \| 收藏 \| 浏览/下载：48/0 \| 提交时间：2018/10/10 High-speed Vision Frame-by-frame Intermittent Tracking Fast-moving-object Inspection Image Stabilization
	New algebraic approaches to classical boundary layer problems 期刊论文 OAI收割 ACTA MATHEMATICA SINICA-ENGLISH SERIES, 2011, 卷号: 27, 期号: 6, 页码: 1023-1070 作者: Xu, Xiao Ping \| 收藏 \| 浏览/下载：17/0 \| 提交时间：2018/07/30 Boundary layer equation symmetry transformation moving frame exponential approach trigonometric approach hyperbolic approach rational approach
	ASYMMETRIC AND MOVING-FRAME APPROACHES TO NAVIER-STOKES EQUATIONS 期刊论文 OAI收割 QUARTERLY OF APPLIED MATHEMATICS, 2009, 卷号: 67, 期号: 1, 页码: 163-193 作者: Xu, Xiaoping \| 收藏 \| 浏览/下载：15/0 \| 提交时间：2018/07/30 Navier-Stokes equations asymmetric condition moving frame exact solution symmetry transformation
	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：29/0 \| 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.
	Design and DSP implementation of star image acquisition and Star point fast acquiring tracking (EI CONFERENCE) 会议论文 OAI收割 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China 作者: Wang X.; Wang X.; Wang X. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 Star sensor is a special high accuracy photoelectric sensor. Attitude acquisition time is an important function index of star sensor. In this paper the design target is to acquire 10 samples per second dynamic performance. On the basis of analyzing CCD signals timing and star image processing a new design and a special parallel architecture for improving star image processing are presented in this paper. In the design the operation moving the data in expanded windows including the star to the on-chip memory of DSP is arranged in the invalid period of CCD frame signal. During the CCD saving the star image to memory DSP processes the data in the on-chip memory. This parallelism greatly improves the efficiency of processing. The scheme proposed here results in enormous savings of memory normally required. In the scheme DSP HOLD mode and CPLD technology are used to make a shared memory between CCD and DSP. The efficiency of processing is discussed in numerical tests. Only in 3.5ms is acquired the five lightest stars in the star acquisition stage. In 43us the data in five expanded windows including stars are moved into the internal memory of DSP and in 1.6ms five star coordinates are achieved in the star tracking stage.
	A new high-precision measurement system used in the image calibration of large-sized photographic instrument (EI CONFERENCE) 会议论文 OAI收割 Optical Design and Testing II, November 8, 2004 - November 11, 2004, Beijing, United states 作者: Li Y.; Liu Z.; Li Y.; Li Y.; Li Y. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 The purpose of characterizing the image of large-sized photographic instrument is to make the directionality of three coordinate axises in the three-dimensional coordinate of the image and the directionality of three axises of coordinate in the frame of axes of the instrument keep the same direction. This problem was solved by a high-precision measurement system composed of double-theodolite and a set of communication system. Two cube prisms will be respectively placed on the image surface and the instrument. Every cube prism will stand for a three-dimensional coordinate from the image surface or the instrument. As a result the interdependence of both coordinates from the image surface and the instrument can be obtained by measuring the interdependence of the both cube prisms with autocollimation survey axiom. In the survey system two high-precision stations TDA5005 from Leica Company will be selected as double-theodolite and the interdependence of both coordinates can be achieved by moving the station only at one time. Therefore this measurement system is a high efficient and high-precision surveying method to the image calibration of the large-sized photographic instrument. Based on the experiment its measuring accuracy can reach arc-second level.