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1.
图像超分辨率复原技术的现状与展望   总被引:2,自引:0,他引:2  
图像超分辨率复原技术是由一序列低分辨率变形图像来估计一幅或多幅较高分辨率的非变形图像,同时还能够消除加性噪声以及由有限检测器尺寸和光学产生的模糊,是图像融合领域中的一个重要分支。对此分别从超分辨率复原技术的理论基础、发展现状以及未来的研究发展方向进行了论述。  相似文献   

2.
超分辨率复原技术的发展   总被引:18,自引:0,他引:18  
超分辨率原复技术就是由一序列低分辨率变形图像来估计一幅(或一序列)较高分辩率的非变形图像,同时还能够消除加性噪声以及由有限检测器尺寸和光学元件产生的模糊,它是图像融合领域中的一个重要分支。这项技术广泛应用于遥感,医学成像和高清晰度电视等多个领域,2人超分辨率复原的含义,应用场合,技术种类和未来研究展望等多个方面,对超分辨率复原领域的发展进行了论述。  相似文献   

3.
在小波变换域内实现图像的超分辨率复原   总被引:8,自引:0,他引:8  
张新明  沈兰荪 《计算机学报》2003,26(9):1183-1189
提出了在小波域内实现图像的超分辨率复原的方法,这种方法可以达到自适应边缘保持的目的,算法特点如下:(1)对观测模型实施正交小波变换,获得超分辨率复原问题的空频域描述;(2)采用广义高斯概率模型来构建超分辨率图像的尺度系数和小波系数的先验描述;(3)采用半二次正则化迭代方法来完成小波域超分辨率复原的求解过程。  相似文献   

4.
基于并行遗传算法的图像超分辨率复原   总被引:7,自引:2,他引:7  
图像超分辨率复原技术,提供了一种利用低分辨率像机获取高分辨率图像的可能途径。图像超分辨率复原有频域方法和空域方法两类:其中频域方法主要基于频谱解混叠;空域方法又分迭代反投影方法、凸集投影方法、Bayesian估计方法等。为了提高图像超分辨率复原的效率和提高复原图像的质量,提出了一种基于并行遗传算法的图像(序列)超分辨率复原的新框架方法,由于遗传算法采用实值编码方式,且基于岛模型的并行机制也有利于多帧图像信息的融合,因而使得算法直观和高效;同时提出采用其他超分辨率复原方法的迭代形式来充当遗传算法的变异算子,因为它能有效地利用已有方法的优点。最后,借用图像复原的客观评价指标来评价超分辨率复原算法的效果。实验证明,该方法有效可行。  相似文献   

5.
提出一种基于稀疏表示的单帧运动盲复原方法,它充分利用自然图像中存在的各种先验知识进行求解。该方法分为模糊核估计和图像修复两个阶段。在估计模糊核时,它运用shock滤波器从模糊图像中预测出清晰边缘,以此指导全局图像的复原,并运用多尺度策略来解决大模糊核问题。在图像修复阶段,运用稀疏表示理论对复原图像进行降噪和重建,最终提高图像复原质量。实验结果表明,在不同噪声和模糊核条件下,该算法能有效消除运动模糊。  相似文献   

6.
谢颂华  陈黎  聂晖 《计算机应用》2010,30(2):341-343
常规的超分辨复原方法需要预知退化图像的点扩展函数,但实际应用中许多退化图像的点扩展函数是未知的,因此提出一种新的超分辨率图像盲复原算法,在点扩展函数未知或不确知的情况下对图像进行恢复。该联合插值—恢复的超分辨率图像盲复原方法,利用多信道盲复原估计未知的点扩展函数,迭代运用帧间相似性确定模糊特性,同时结合超分辨率方法得到高分辨率图像。实验结果表明,该算法能有效地实现超分辨率图像的盲复原。  相似文献   

7.
超分辨率图像重建技术就是通过融合多幅变形、模糊、有噪、频谱混叠的低分辨率降质图像(或视频序列)来重建一幅高质量高分辨率图像.MAP估计算法是一种广泛使用的统计重建方法.针对标准的MAP算法引入了自适应概念,引入了图像自适应加权系数矩阵;据此给出一种基于自适应双边全变差的图像超分辨率重建算法,该方法不仅能在图像超分辨率重建过程中抑制噪声,而且能锐化图像中的边缘信息;建立了自适应重建模型并用梯度下降法推导出迭代计算公式.实验表明,该算法在收敛性和精确性上都达到了较好的效果.  相似文献   

8.
目的 针对融合—复原法超分辨率重建中融合与复原两大环节,提出新的改进算法框架:用改进的归一化卷积实现融合,再用改进的最大后验估计实现复原,得到更优的超分辨率重建。方法 改进的归一化卷积引入了双适应度函数和一种新的混合确定度函数;改进的最大后验估计,引入一种特征驱动先验模型,该模型通过混合两种不变先验模型而得到,形式完全取决于图像自身的统计特征。结果 用本文算法对不同降质水平的图像进行重建,并与其他若干算法重建结果比较。无论从视觉效果还是从评价指标,本文算法均优于其他算法。结论 本文超分辨率重建算法,融合环节兼顾了邻域像素的空间距离和光度差,充分利用两种确定度函数的各自优势,可以抑制更多噪声和异常值;复原环节的先验模型依据图像特征而不是经验,对图像刻画更准确。实验结果也验证了本文算法的有效性。  相似文献   

9.
由于可用信息不足,多帧图像超分辨率重建问题常常是一个不适定问题。为解这一问题,需要额外的图像先验知识。本文提出一个基于学习的多帧图像超分辨率重建算法,该方法从训练图像集中学习先验知识。实验表明本文方法要优于传统基于最大后验概率估计的超分辨率重建算法。  相似文献   

10.
多分辨率图像序列的超分辨率重建   总被引:1,自引:0,他引:1  
李展  张庆丰  孟小华  梁鹏  刘玉葆 《自动化学报》2012,38(11):1804-1814
针对不同焦距下拍摄的多分辨率尺度的图像序列,本文提出了一种基于尺度不变特征转换(Scale invariant feature transform, SIFT)和图像配准的超分辨率(Super resolution, SR)图像盲重建算法.首先提取图像SIFT特征点,然后用向量夹角余弦进行特征描述符向量的初匹配,并用随机抽样一致性 (Random sample consensus, RANSAC)算法消除误匹配提高配准精度.计算变换参数后,将低分辨率图像(Low-resolution, LR)像素点映射到高分辨率(How-resolution, HR)网格,最后利用像素可信度加权算法填充缺失像素值,重建更高分辨率的图像.实验表明, 本文算法能精确估计图像序列的缩放因子,可以有效处理仿射变换模型,对配准误差也具有一定的鲁棒性.算法从实质上提高了多分辨率尺度图像序列的分辨率,尤其在低分辨率帧数较少可用于重建的信息量严重不足时也能获得比较满意的重建效果.  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.
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   

18.
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   

19.
蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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