首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
融合技术是遥感数据处理中一种重要的方法。而TM多光谱与SPOT全色图像是遥感融合最为普遍的选择。为了对比分析不同方法在融合TM多光谱与SPOT全色图像上的效果,提出基于色彩空间的HSV变换、基于算数技术的Brovey变换和Gram—Schmidt波谱锐化3种融合方法相结合,实现了对同一传感器的全色和多光谱数据融合。试验表明:就空间信息量而言,经过HSV变换的图像具有最大的空间信息,但其光谱保真能力最差;Brovey变换最大限度保持了原始图像的光谱信息,而空间信息的详细程度较差;Gram-Schmidt波谱锐化后的影像不仅保持了多光谱影像的光谱信息,同时又保持了高光谱全色影像的空间细节信息,是一种较好的图像融合方法。  相似文献   

2.
基于多进制小波的多源遥感影像融合   总被引:14,自引:0,他引:14       下载免费PDF全文
首先介绍了遥感影像融合的一般理论和方法,然后在讨论多进制小波理论和影像特征的基础上,提出了一种基于特征的多进制小波变换的影像融合算法,该算法根据待融合影像分辨率之比来确定采用几进制小波,将待融合的高分辨率影像进行多进制小波变换,然后把高分辨影像经小波变换后获得的低频成分和低分辨率影像依据一定的关系进行相互转换,以形成新的高分辨影像的低频成分,经过多进制小波逆变换获得到融合后的影像,最大限度地利用了待融合影像的信息,防止了影像信息的丢失,通过对具体影像的清晰度和空间分辨率,融合后的影像最大限度地保留了待融合影像的光谱信息,同时提高了待融合影像的清晰度和空间分辨率,给出了SPOT全色影像与SPOT多光谱影像,SPOT全色影像与TM影像的融合结果,并与其他方法进行了比较,从而证明了本方法的优越性和自适应能力。  相似文献   

3.
随着遥感技术的快速发展以及遥感数据的广泛应用,影像的融合处理已成为多源遥感影像信息聚合、获取高质量空间影像的有效途径。基于SPOT全色和多光谱、TM多光谱遥感数据,运用IHS和小波变换相结合的融合方法,进行了不同来源影像融合、融合图像质量对小波分解层数的响应以及这种响应对研究区域面积的敏感性分析。结果表明,多源影像之间的IHS和小波变换相结合的融合方法明显地改善了影像的质量;融合图像质量与原始影像空间分辨率相关,如经1层小波变换融合,TM,SPOT融合图像熵值的增幅分别为2095%,019%。小波融合图像质量对小波分解的层数的敏感性较强,在小波分解层数为2,3或4时,都能获得高质量的融合图像;小波分解层数等于或大于5时融合图像质量下降,7是大幅下降的临界层数。融合图像质量对小波分解层数的响应特性对面积大小变化是敏感的,特别是小面积图像,为此,实际应用中需特别注意最佳分解层数问题。  相似文献   

4.
无人机航拍影像空间分辨率高,纹理信息丰富,但其光谱信息匮乏,不利于遥感信息解译。为此提出一种基于脉冲耦合神经网络模型的融合算法,通过计算非规则区域的统计特性,将无人机航拍影像的亚米级高空间分辨率信息注入到遥感卫星多光谱影像中,以获取具有亚米级空间分辨率和高的光谱分辨率的遥感融合影像。通过定性和定量的对比实验,表明该算法优于经典的遥感影像融合方法,同时验证了其在减小光谱扭曲和空间纹理细节保持等方面的有效性。  相似文献   

5.
影像融合在三维地形仿真中的应用   总被引:4,自引:0,他引:4  
在同一地区,不同时期、不同传感器平台的遥感影像数据具有不同的空间分辩率、波谱分辩率和时相分辨率,如果能将它们各自的优势综合起来,可经弥补单一影像上信息的足,扩大各自信息的应用范围。首先将同一地区的TM影像与IKONOS影像进行精确配准后,使用基于HIS变换的融合方法,将两种影像进行融合,融合结果在保持TM影像丰富光谱信息的基础上,引入了IKONOS影像的几何特征,从面弥补了TM影像分辩率低和IKONOS影像光谱信息缺乏的缺点,并生成具有1m分辩率的彩色影像;最后将融合结果与相应地区的DEM数据进行复合,生成了具有高度真实感的三维影像图。  相似文献   

6.
SAR与SPOT数据融合方法研究   总被引:1,自引:1,他引:0  
随着多空间分辨率、多光谱分辨率、多传感器遥感数据日益增多,数据融合技术已经在地学领域得到广泛应用。以SAR和SPOT多光谱影像为数据源,通过几何校正、辐射定标、噪声去除等预处理,采用PCA、IHS、BT、HPF以及WT融合方法进行融合试验,选取标准差、信息熵以及相关系数对融合结果进行图像质量评价。结果表明:基于结构信息变换的HPF和WT方法,纹理结构信息保持较好,线性地物特征尤为突出;基于统计信息变换的PCA方法,不仅能较好保持多光谱信息,而且也保持了SAR影像纹理结构信息,信息熵指数最大;基于彩色变换的IHS和BT方法,虽然视觉效果较理想,但是色彩及光谱失真现象严重,信息熵值最小。
  相似文献   

7.
一种基于小波变换的图象融合算法   总被引:16,自引:4,他引:12       下载免费PDF全文
基于多分辨率小波变换的融合算法近年来得到了广泛的应用。为了充分利用各种遥感图象的信息中,针对“资源一号”卫星图象和SPOT全色波图象,提出了一种新的基于区域能量特征的小波变换复原-增强融合算法。通过同IHS、PCA和HPF几种传统融合方法的比较和结果评价,证明该方法在提高“资源一号”卫星图象空间分辨率的同时,还较好地保留了多光谱图象的光谱信息,并且有效地克服了“资源一号”卫星图象模糊的特点。  相似文献   

8.
针对传统多光谱与全色影像融合方法容易产生畸变、忽略多光谱影像本身的空间细节特征等问题,提出了一种基于超分辨率卷积神经网络与Curvelet变换的影像融合方法,以提升多光谱影像的空间细节,加强其与全色影像的相关性,减少融合产生的畸变。该方法首先利用高分辨率全色影像进行超分辨率重建学习,利用学习得到的网络参数对多光谱影像进行超分辨率卷积神经网络重建,提升其空间细节特征;其次,在Gram-Schmid变换融合基础上,根据Curvelet变换具有保持影像空间细节的特点,将全色影像与替换分量进行融合;最后,通过逆变换得到高分辨率遥感影像。实验结果表明,该算法在影像光谱信息和空间细节表达能力上,整体优于其他传统算法,且对不同数据具有很好的适应性。  相似文献   

9.
针对MODIS和SPOT影像融合问题,提出了一种基于自适应加权的亮度相关矩多分辨率影像融合方法。该方法首先对SPOT影像进行小波分解,将MODIS影像由RGB颜色空间变换到IHS颜色空间;然后,根据强度分量和SPOT影像低频分量加权后的局部均值和方差来定义影像亮度相关矩,以选择不同策略进行融合;最后,通过IHS逆变换和小波逆变换来得到包含更多信息和有效特征的融合影像。试验结果证明,该方法得到的融合影像,在保留地物光谱信息和提高空间分辨率上都具有很好的效果。  相似文献   

10.
以SPOT5高空间分辨率遥感影像为研究数据,采用面向对象的遥感影像分类方法,将基于像素的分类精度与基于影像对象的分类精度进行对比分析。结果表明:基于像素的分类方法在处理高空间分辨率遥感影像时具有一定的局限性,而面向对象的分类方法充分利用了影像中的光谱信息、几何结构、空间信息及上下文信息,在高空间分辨率遥感影像分类方面更具有优势,有良好的应用前景。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

19.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

20.
正The 34th Chinese Control Conference and SICE Annual Conference 2015(CCCSICE2015)is organized by the Technical Committee on Control Theory(TCCT)of Chinese Association of Automation(CAA)and the Society of Instrument and Control Engineers(SICE)of Japan,and locally organized by Hangzhou Dianzi University(HDU).  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号