共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
合成孔径雷达图像舰船目标检测与分析 总被引:3,自引:0,他引:3
舰船检测是合成孔径雷达图像海洋应用的一个重要部分。本文设计了舰船检测步骤,给出了SAR图像舰船形状分析的方法,对于舰船目标进行自动检测并计算出舰船参数,通过实验验证目标的检测与分析是有效的。 相似文献
3.
4.
5.
6.
7.
Methods for Displaying Three-Dimensional Images 总被引:3,自引:0,他引:3
Son J.-Y. Javidi B. Kwack K.-D. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2006,94(3):502-523
The essential components of generating three-dimensional (3-D) images are defined, and various methods of creating each of the components are explained. The components are image acquisition, image multiplexing and processing, and display mechanisms. For image acquisition, transforming, synthesizing based on disparity, voxel and wavefront deformation, and sampling and photographing methods are used. For multiplexing, time, spatial, and spatiotemporal, and for processing, chirping, layering, and pixel cell based multiview image arrangement methods are used. The display mechanisms are classified into projection, contact,and scanning types depending on their means of displaying images. From these methods, 3-D images with real volume, with parallax only and with psychologically induced depth sense can be generated. The display mechanisms have another important mission of creating viewing zones. For this purpose, all 3-D imaging methods employ a special form of optics or mechanisms complying with their image multiplexing schemes. These optics and mechanisms are essential in realizing 3-D imaging systems but at the same time they provide many unfriendly and uncomfortable effects to viewers, and also impose some functional limitations. 相似文献
8.
9.
评述了首次实现星问光学连接的欧洲空间局(ESA)的SILEX计划的检测与验证方法,相信对我国星间光通信技术的研究与发展具有一定的促进作用。 相似文献
10.
Boulanger J. Kervrann C. Bouthemy P. Elbau P. Sibarita J.-B. Salamero J. 《IEEE transactions on medical imaging》2010,29(2):442-454
11.
A method is presented to calculate state space realizations of a three-dimensional image set. It is based on interpreting the image set as the impulse response of a 3D separable system. As an application it is shown how this method, combined with approximation steps, including balanced model reduction, can be used to suppress noise in three-dimensional image sets. The approach was motivated by a practical problem in the analysis of three-dimensional fluorescent microscopy image data of fluorescently labelled cells. The method is illustrated by an analysis of simulated data and experimental data. The proposed approach can also be applied to a two-dimensional image in a straightforward way.Received July 9, 2003; Revised April 20, 2003; Accepted June 11, 2004; First online version published in December 2004 相似文献
12.
S. Piperno I. Kaplan‐Ashiri S. R. Cohen R. Popovitz‐Biro H. D. Wagner R. Tenne E. Foresti I. G. Lesci N. Roveri 《Advanced functional materials》2007,17(16):3332-3338
Geoinspired synthetic chrysotile nanotubes both stoichiometric and 0.67 wt % Fe doped were characterized by transmission electron microscopy and electron diffraction. Bending tests of the synthetic chrysotile nanotubes were performed using the atomic force microscope. The nanotubes were found to exhibit elastic behaviour at small deformations (below ca. 20 nm). Young's modulus values of (159 ± 125) GPa and (279 ± 260) GPa were obtained from the force‐deflection curves using the bending equation for a clamped beam under a concentrated load, for the stoichiometric and the Fe doped chrysotile nanotubes, respectively. The structural modifications induced by Fe doping altered the mechanical properties, with an apparent dependence of the latter on the number of constituting walls of the nanotubes. 相似文献
13.
《IEEE transactions on image processing》2009,18(9):2048-2058
14.
15.
16.
图像边缘检测方法分析与研究 总被引:3,自引:1,他引:2
边缘是图像的重要特征,边缘检测在计算机视觉、图像分析等应用中起着重要作用,是图像目标检测中一个基础而又困难的问题,本文分析了常规的边缘检测方法及其特点,并用这些方法分别对原始图像和噪声图像进行了处理,处理的结果表明,Sobel、Roberts、Prewitt、Kirsch、LOG算子的图像处理效果各有利弊,它们在定位精度、噪声敏感度和复杂度之间存在互相抑制的关系。 相似文献
17.
18.
19.
通过痰涂片镜检法检测结核抗酸杆菌,是识别和诊断结核病的一种快速、价廉和特定的检测方法.为提高结核病痰涂片显微图像的质量,提出了一种基于多帧不同曝光图像信息融合,扩展被检测显微图像的动态范围,提高检测视野显微图像质量的实现方法.首先在保持CCD曝光时间不变的条件,通过计算机控制圆盘型光学梯度衰减片旋转定位的方法,摄取同一视场多帧不同曝光量的显微图像序列,从而获取场景的高动态范围显微图像信息.然后利用拉普拉斯金字塔算法将显微图像进行分层,采用图像梯度与信息熵相结合对层次图像进行评价,分配相应的合成权重系数,并用拉普拉斯金字塔逆算法,合成一帧高质量的图像.实验表明,所提出方法能有效地表达亮区和暗区的场景信息,增强图像的细节特征,提高痰涂片显微成像的质量,有利于提高显微图像智能检测的精度. 相似文献
20.
A Two-Dimensional Bandwidth Extrapolation Technique for Polarimetric Synthetic Aperture Radar Images 总被引:1,自引:0,他引:1
The resolution of a synthetic aperture radar (SAR) image, in range and azimuth, is determined by the transmitted bandwidth and the synthetic aperture length, respectively. Various superresolution techniques for improving resolution have been proposed, and we have proposed an algorithm that we call polarimetric bandwidth extrapolation (PBWE). To apply PBWE to a radar image, one needs to first apply PBWE in the range direction and then in the azimuth direction, or vice versa . In this paper, PBWE is further extended to the 2-D case. This extended case (2D-PBWE) utilizes a 2-D polarimetric linear prediction model and expands the spatial frequency bandwidth in range and azimuth directions simultaneously. The performance of the 2D-PBWE is shown through a simulated radar image and a real polarimetric SAR image 相似文献