首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   32篇
  国内免费   7篇
  完全免费   14篇
  自动化技术   53篇
  2019年   1篇
  2018年   3篇
  2017年   2篇
  2016年   1篇
  2015年   4篇
  2014年   10篇
  2013年   5篇
  2012年   2篇
  2011年   4篇
  2010年   3篇
  2009年   4篇
  2008年   4篇
  2007年   2篇
  2006年   1篇
  2003年   3篇
  2002年   1篇
  2000年   1篇
  1999年   1篇
  1981年   1篇
排序方式: 共有53条查询结果,搜索用时 62 毫秒
1.
Variational Image Restoration and Decomposition with Curvelet Shrinkage   总被引:1,自引:1,他引:1  
The curvelet is more suitable for image processing than the wavelet and able to represent smooth and edge parts of image with sparsity. Based on this, we present a new model for image restoration and decomposition via curvelet shrinkage. The new model can be seen as a modification of Daubechies-Teschke’s model. By replacing the B p,q β term by a G p,q β term, and writing the problem in a curvelet framework, we obtain elegant curvelet shrinkage schemes. Furthermore, the model allows us to incorporate general bounded linear blur operators into the problem. Various numerical results on denoising, deblurring and decomposition of images are presented and they show that the model is valid.
Lingling JiangEmail:
  相似文献
2.
3.
4.
Restoration of the photographs damaged by the camera shake is a challenging task that manifested increasing attention in the recent period. Despite of the important progress of the blind deconvolution techniques, due to the ill-posed nature of the problem, the finest details of the kernel blur cannot be recovered entirely. Moreover, the additional constraints and prior assumptions make these approaches to be relative limited.
In this paper we introduce a novel technique that removes the undesired blur artifacts from photographs taken by hand-held digital cameras. Our approach is based on the observation that in general several consecutive photographs taken by the users share image regions that project the same scene content. Therefore, we took advantage of additional sharp photographs of the same scene. Based on several invariant local feature points, filtered from the given blurred/non-blurred images, our approach matches the keypoints and estimates the blur kernel using additional statistical constraints.
We also present a simple deconvolution technique that preserves edges while minimizing the ringing artifacts in the restored latent image. The experimental results prove that our technique is able to infer accurately the blur kernel while reducing significantly the artifacts of the spoilt images.  相似文献
5.
传统插值算法放大后的图像产生细节模糊和边缘锯齿化,为此提出一种基于边缘检测的多方向模糊消除算法。采用双通道方式,边缘检测原图像,提取放大后的图像边缘信息,根据多方向边缘梯度变化,对边缘邻接像素点优化;多倍放大时采取小倍率递进方式实现。实验证明,算法模型简单易于实现,对提高图像质量取得了明显的效果。  相似文献
6.
超分辨率图像复原是当今一个重要的热门研究课题. 本文提出了一种基于全变差模型的超分辨率复原快速解耦算法. 利用半二次正则化思想, 提出了一个新的解耦TV (Total variation)模型. 利用交替最小化方法和线性空间不变模糊的性质将上采样融合、去模糊和去噪分步进行. 算法中对上采样融合采用非迭代的直接计算方法; 去模糊过程采用基于变换的预处理共轭梯度迭代算法, 而去噪过程采用了子空间投影方法. 本文算法降低了算法复杂度; 超分辨率重建图像在去除噪声的同时, 不仅能够保证图像平坦区域的保真度, 较好地抑制阶梯效应的产生, 而且能够保持图像中边缘等重要几何结构的清晰度.  相似文献
7.
分析了航空影像梯度分布特征,介绍了一种改进的模糊核估计方法和BRL(Bilateral Richardson-Lucy)反卷积算法,并提出了一种同时具有模糊核估计和BRL反卷积功能的单幅航空影像去除运动模糊方法,最后用运动模糊航空影像进行了实验验证和分析。结果表明,该方法可有效去除像移,改善模糊航空影像视觉效果,特别是可以保护图像中重要边缘信息。  相似文献
8.
传统的条码图像采集和识别是通过工业扫描枪。近年来,随着移动增值业务和3G技术的发展,2维条码在手机设备的应用中得到飞速发展。以Data Matrix为例,研究了基于嵌入式手机设备的2维条码识别技术。首先根据Data Matrix条码的特点,给出了一种基于链码跟踪和线段检测的快速Data Matrix检测算法。接着分析了条码信号经过点扩展函数卷积后的降质模型,并利用维纳滤波对条码信号进行反模糊滤波。最后,针对透视畸变的现象,设计了一种适合于嵌入式手机设备的快速反透视算法。实验结果表明,提出的识别算法具有优秀的性能,显著提高了条码的识别率,满足了实际使用的要求。  相似文献
9.
Non-blind motion deblurring problems are highly ill-posed and so it is quite difficult to find the original sharp and clean image. To handle ill-posedness of the motion deblurring problem, we use nonlocal total variation (abbreviated as TV) regularization approaches. Nonlocal TV can restore periodic textures and local geometric information better than local TV. But, since nonlocal TV requires weighted difference between pixels in the whole image, it demands much more computational resources than local TV. By using the linearization of the fidelity term and the proximal function, our proposed algorithm does not require any inversion of blurring operator and nonlocal operator. Therefore, the proposed algorithm is very efficient for motion deblurring problems. We compare the numerical performance of our proposed algorithm with that of several state-of-the-art algorithms for deblurring problems. Our numerical results show that the proposed method is faster and more robust than state-of-the-art algorithms on motion deblurring problems.  相似文献
10.
董宁  文志强  余波 《计算机工程》2011,37(11):223-224,227
为降低图像反降晰过程的复杂度,提出一种新的反降晰算法。对图像进行适当的分块,导入合适宽度的防反射边界条件,消除其他类型边界条件导致的法向导数不连续的缺陷。实验结果表明,在与全局反降晰算法信噪比相当的情况下,具有合适分块数目和较小边界宽度的新算法能更有效地减少图像反降晰时间。  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