Results 71 to 80 of about 538 (196)
Improved Nonsubsampled Contourlet Transform for Multi-sensor Image Registration [PDF]
, 2013 Homologous feature point extraction is a key problem in the multi-sensor image registration. In this paper, a new feature point extraction method using nonsubsampled contourlet transform (NSCT) and an adaptive shrink operator (ASO_NSCT) for multi-sensor ...
Huang H. G. +3 more
core
Image Fusion Algorithm Based on Neighbors and cousins information in Nonsubsampled Contourlet Transform Domain [PDF]
, 2007 Nonsubsampled contourlet transform (NSCT) provides flexible multiresolution, anisotropy and directional expansion for images. Compared with the foremost contourlet transform, it is shift-invariant and can overcome the pseudo-Gibbs phenomena around ...
ZI-QIAN ZHU +9 more
core
IMAGE SEPARATION BASED ON NONSUBSAMPLED CONTOURLET (NSCT) [PDF]
, 2013 When an image or a document on a paper acquired through scanning, photographing or photocopying, the image on the back page may be show through. This cause a non-linear image mixture and should be resolved through a non-linear source separation.
Azadeh Bamdad Moghadam +3 more
core +1 more source
Sensors, 2019 Multi-pixel photon counting detectors can produce images in low-light environments based on passive photon counting technology. However, the resulting images suffer from problems such as low contrast, low brightness, and some unknown noise distribution ...
Xuan Wang +5 more
doaj +1 more source
Directional edge and texture representations for image processing [PDF]
, 2007 An efficient representation for natural images is of fundamental importance in image processing and analysis. The commonly used separable transforms such as wavelets axe not best suited for images due to their inability to exploit directional ...
Yao, Zhen
core
An Multi-scale Edge Detection Approach [PDF]
, 2012 An novel edge detection approach is proposed. Firstly, the nonsubsampled contourlet transform is used to decompose the original image into low frequency approximation image and the high frequency subbands.
Yueli, Cui, Aihua, Chen, Zhigang, Chen
core +1 more source
Local Feature Descriptor Based on Nonsubsampled Contourlet Transform Domain
工程科学与技术, 2015 :In order to obtain the robust local feature descriptor, a local feature descriptor based on nonsubsampled contourlet transform (NSCT) domain was proposed, which does not need to estimate the main direction in the construction process.
颜普, 梁栋, 朱明, 唐俊
doaj
Multi-focus Image Fusion Algorithm Based on Nonsubsampled Contourlet Transform [PDF]
, 2009 非子采样COnTOurlET变换(nSCT),是针对COnTOurlET变换的一些局限性进行了改进,可以对图像进行灵活的多尺度、多方向和平移不变性分解.提出了一种基于nSCT的多聚焦图像融合方法.首先对多聚焦图像进行nSCT变换;然后对变换得到的低频分量系数采用改进的加权平均融合规则进行融合处理,对高频分量的最高层和其它层系数分别采用绝对值最大和改进的区域方差融合规则进行融合处理;最后重构图像得到融合结果;并给出了实验结果.对结果的分析比较表明 ...
邹蓉, 李玲玲, 李翠华
core
LMMSE and MAP estimators for reduction of multiplicative noise in the nonsubsampled contourlet domain [PDF]
, 2009 In this paper, two algorithms for multiplicative noise reduction, using the undecimated separable wavelet transform, are extended to the nonsubsampled contourlet (NSCT) domain.
Alparone, Luciano +5 more
core +1 more source
NSCT BASED LOCAL ENHANCEMENT FOR ACTIVE CONTOUR BASED IMAGE SEGMENTATION APPLICATION [PDF]
ICTACT Journal on Image and Video Processing, 2010 Because of cross-disciplinary nature, Active Contour modeling techniques have been utilized extensively for the image segmentation. In traditional active contour based segmentation techniques based on level set methods, the energy functions are defined ...
Hiren Mewada, Suprava Patnaik
doaj