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Image enhancement based on contourlet transform
Signal, Image and Video Processing, 2014Images captured with insufficient illumination generally have dark shadows and low contrast. This problem seriously affects other forms of image processing schemes such as face detection, security surveillance, image fusion. In this paper, a new image enhancement algorithm using the important features of the contourlet transform is presented.
Melkamu Hunegnaw Asmare +2 more
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Pan-sharpening via the contourlet transform
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007The wavelet transform has been a popular choice for the spatial transformation in the pan-sharpening process. However, the wavelet transform do not represent the directional information efficiently. On the other hand, the contourlet transform, which also has a property of multiresolution decomposition similar to the wavelet, is known to provide ...
Vijay P. Shah +2 more
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Image inpainting with nonsubsampled contourlet transform
Pattern Recognition Letters, 2013A new algorithm for image inpainting based on the searching of redundancy for corner points across different scales and orientations is proposed. The searching utilises the nonsubsampled contourlet transform (NSCT) of the original image. The target region is filled-in following the priority which is given to the corner points that accumulate a high ...
Rosa Rodríguez-Sánchez +2 more
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Iris identification using contourlet transform
SPIE Proceedings, 2007With the increased emphasis on security and personal authentication, an accurate biometric-based authentication system has become a critical requirement in a variety of applications. Among different biometrics, authentication based on iris features has received a lot of attention since its introduction in 1992. The wavelet transform has been proposed
Rami Zewail +2 more
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The contourlet transform for image fusion
SPIE Proceedings, 2006In this paper, we introduce a new image fusion method based on the contourlet transform. Firstly, the problem that wavelet transform could not efficiently represent the singularity of linear/curve in image processing is analyzed. Secondly, the principal of Contourlet and its good performance in expressing the singularity of two or higher dimensional ...
Qiguang Miao, Baoshu Wang
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Vehicle Recognition Using Contourlet Transform and SVM
Fifth International Conference on Information Technology: New Generations (itng 2008), 2008This paper proposes the performance of a new algorithm for vehicles recognition system. This recognition system is based on extracted features on the performance of image's Contourlet transform & achieving standard deviation of Contourlet coefficients matrix in different subbands & various directions.
Saeid Rahati +3 more
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Shearlet and contourlet transforms for analysis of electrocardiogram signals
Computer Methods and Programs in Biomedicine, 2018Cardiac arrhythmia is an abnormal variation in the heart electrical activity that affects millions of people worldwide. Electrocardiogram (ECG) signals have been widely used to assess and diagnose cardiac abnormalities.A novel methodology based on shearlet and contourlet transforms for automatically classify an input ECG signal into different heart ...
Paulo H. J. Amorim +4 more
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Image coding with iterated contourlet and wavelet transforms
2004 International Conference on Image Processing, 2004. ICIP '04., 2005This paper presents a new coding technique based on a mixed contourlet and wavelet transform. The redundancy of the transform is controlled by using the contourlet at fine scales and by switching to a separable wavelet transform at coarse scales. The transform is then optimized through an iterative projection process in the transform domain in order to
Vivien Chappelier +2 more
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Structuring of Contourlet Transform for Pipeline-Based Implementation
Circuits, Systems, and Signal Processing, 2015Contourlet transform (CT) is a powerful image processing tool. Even though many promising applications have been proposed, no hardware implementation of CT has been reported. This paper analyzes CT to form a structure which is hardware implementable. CT consists of two main parts, Laplacian pyramid (LP) and directional filter bank (DFB). In both parts,
Seyed Mohammad Ali Zeinolabedin +3 more
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Improving medical image fusion method using fuzzy entropy and nonsubsampling contourlet transform
International journal of imaging systems and technology (Print), 2020Many types of medical images must be fused, as single‐modality medical images can only provide limited information due to the imaging principles and the complexity of human organ structures.
Wei Li +3 more
semanticscholar +1 more source