搜索结果: 76-90 共查到“知识库 全息技术和三维成像”相关记录474条 . 查询时间(2.7 秒)
由单目图像序列光流重建物体或场景的三维运动与结构是计算机视觉、图像处理与模式识别等领域的重要研究内容，在机器人视觉、无人机导航、车辆辅助驾驶以及医学影像分析等方面具有重要的应用.本文首先从精度与鲁棒性等方面对单目图像序列光流计算及三维重建技术近年来取得的进展进行综述与分析.然后采用Middlebury测试图像序列对HS、LDOF、CLG-TV、SOF、AOFSCNN和Classic+NL等典型光流...
非凸高阶全变差正则化自然光学图像盲复原
点扩散函数 正则化 全变差 分裂布雷格曼
2015/12/25
受噪声和图像边缘结构信息的影响,传统的图像盲复原方法易出现“振铃”、“拖尾”、“阶梯”等现象。为解决上述问题,本文利用图像的后验信息、点扩散函数(PSF)的稀疏性以及l1, l2两类范数在约束中的不同作用,提出了一种更一般的非凸高阶全变差正则化自然光学图像盲复原模型。针对提出模型的非凸优化问题,在数值求解过程中对模型的范数结构进行改进,引入Split-Bregman权值迭代方法,提高了计算精度。对...
采用目标区域互信息的星空图像配准
星空图像 星点目标区域 互信息 图像配准
2015/11/6
提出了采用目标区域互信息的测度方法对星图进行精确配准以解决星图中存在噪声、伪星点、星点稀疏以及星图间的旋转等问题。首先对星图进行图像分割,检测出星点目标并对星点进行二值化处理;然后基于互信息配准模型,在含星点的目标区域上,利用Powell算法将最大互信息作为目标函数来指导图像间最优变换参数的搜索。分析了适宜于互信息测度配准的星点分割算法,并论证了采用目标区域互信息的星图配准的可行性。对提出的算法与...
提出了一个基于偏振调制的最佳接收灵敏度ROF链路系统。其根本原理在于实现具有最佳光载波边带比(OCSR)的光单边带调制技术,为此,利用偏振调制和滤波技术,线偏光首先经由一个特定偏振角α进入偏振调制器,然后一个固定起偏角β的起偏器被用来合并偏振信息,最后利用一个光滤波器实现光双边带调制到光单边带调制的转换。研究发现所获得的OCSR只与两个偏振角(α和β)有关,通过仔细调节上述指标,可以将OCSR调谐...
提出了利用数字全息干涉术可视化观测液相扩散过程.实验中,采用马赫-曾德干涉仪光路记录乙醇与水之间两相扩散过程的多幅数字全息图;再通过数值再现不同扩散状态的波前相位分布,获得液体中的摩尔浓度分布;最后,根据菲克定律获得两相流扩散系数.结果表明:利用数字全息干涉术可实现对液相扩散传质过程的快速、实时及高精度测量;该方法还具有可实现远程监控、拥有大量微观数据的优点;此外,采用文中全息干涉光路结合波分与角...
REAL-TIME VIDEO-BASED RECONSTRUCTION OF URBAN ENVIRONMENTS
computer vision, 3D model, stereo reconstruction, large-scale reconstruction, real time processing, geo-registration
2015/10/8
We present an approach for automatic 3D reconstruction of outdoor scenes using computer vision techniques. Our system collects
video, GPS and INS data which are processed in real-time to produce geo-...
3D SOLID REPRESENTATION AND VISUALIZATION FOR LARGE HETEROGENEOUS SITES WITH URBAN AND RURAL HERITAGE - A CASE STUDY
3D modeling of complex sites and architectures Visualization issues for large and complex sites
2015/10/8
This article introduces usage of 3D solid modeling methods in order to represent and visualize highly complex environments such as
large heterogeneous sites integrating urban and rural heritage cont...
RULE-BASED 3D MODELING FOR CHINESE TRADITIONAL ARCHITECTURE
Architecture Cultural Heritage TLS Extraction Modelling Point Cloud Matching
2015/10/8
The Chinese traditional architecture called as DaMu structure, which wooden materials were used mainly. The work of historic
heritage conservation needs the surveying maps and the 3D model of the bui...
正弦脉冲宽度调制条纹结合相位编码条纹的三维测量方法
三维测量 离焦 正弦脉冲宽度调制条纹 相位编码条纹
2015/10/5
提出了正弦脉宽调制和相位编码结合的一种三维形貌测量方法。这种方法离焦投影编码的两种条纹到被测对象上,使用相移算法,由正弦脉冲宽度调制条纹得到截断相位,由相位编码条纹解码得到条纹级次,从而恢复测量对象的三维形貌。实验结果证明了该方法有两个优点:(1)轻度离焦滤除了谐波从而能降低测量误差;(2)基于相位的编码方式能测量表面反射率不一物体。
3D VISUALISATIONS IN SIMULATIONS OF FUTURE LAND USE: EXPLORING THE POSSIBILITIES OF NEW, STANDARD VISUALISATION TOOLS
three-dimensional visualisations visualisation techniques Google Earth
2015/9/28
Three-dimensional visualisations are an interesting method for representing model outcomes. But most visualisation techniques
require expensive software, and a lot of time to create them. When a lar...
GENERALISATION OF 3D BUILDING MODELS BY CELL DECOMPOSITION AND PRIMITIVE INSTANCING
Generalization Algorithms Building Three-dimensional GIS Visualization
2015/9/28
The article presents a cartographic generalisation approach for 3D building models with regard to the thematic visualisation of urban
landscapes. Based on our earlier work to utilise approximating p...
3D URBAN MODELLING WITH VRML TECHNOLOGY – COMBINATION OF 2D AND 3D INFORMATION AND INTEGRATION TO MOBILE CLIENTS
Remote Sensing GIS VRML 3D Urban Modelling
2015/9/28
A 3D representation of a city embedded in an internet environment is not a new technology. It is already used in many
projects which present tourist information. But 3D modelling assumes a lot of ma...
EXPLORE BALLENBERG COMBINING 3D LANDSCAPE MODELS WITH ADDITIONAL INFORMATION
three-dimensional information systems content integration interaction
2015/9/28
The management of the open-air museum Ballenberg with about 100 original century-old buildings from all over Switzerland plans
an attractive new overview map and a 3D information system of the museu...
EMERGENCY STATE HEALTH SERVICE ACCESSIBILITY VISUALIZATION IN A 3D CITY ENVIRONMENT
3D City Modeling Accessibility Visualization Decision-Making
2015/9/28
In urban emergency management, in order to generate decisions from heterogeneous information types, decision makers must be
able to identify relations between information types. The perception of th...
Evolution of perturbations in 3D air quality models
perturbation growth automatic differentiation three-dimensional numerical models -sensitivity analysis air quality models
2015/9/16
The deterministic approach of sensitivity analysis is applied on the solution vector of an Air Quality Model. In
particular, the photochemical CAMx code is augmented with derivatives utilising the au...