Results 131 to 140 of about 762,837 (162)
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SHEARLET TRANSFORMS AND DIRECTIONAL REGULARITIES
International Journal of Wavelets, Multiresolution and Information Processing, 2010In an effort to characterize uniform and pointwise Hölder regularities, we obtain necessary decay rates and sufficient decay rates of continuous and discrete shearlet transform across scales. They are the same rates as those of the Hart Smith and continuous curvelet transforms.
P. Lakhonchai +2 more
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Uncertainty Principles For The Continuous Quaternion Shearlet Transform
Advances in Applied Clifford Algebras, 2019In this paper, authors have studied some novel uncertainty principles for the continuous quaternion shearlet transform using the machinery of quaternion convolution, quaternion Fourier transform and operator theory. Besides, the fundamental properties including the Parseval's and reconstruction formulae, the Heisenberg-type uncertainty principles are ...
Kamel Brahim, Bochra Nefzi, Emna Tefjeni
exaly +3 more sources
COORBIT SPACE THEORY FOR THE TOEPLITZ SHEARLET TRANSFORM
International Journal of Wavelets, Multiresolution and Information Processing, 2012In this paper we are concerned with the continuous shearlet transform in arbitrary space dimensions where the shear operation is of Toeplitz type. In particular, we focus on the construction of associated shearlet coorbit spaces and on atomic decompositions and Banach frames for these spaces.
Stephan Dahlke +2 more
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3-D Discrete Shearlet Transform and Video Processing
IEEE Transactions on Image Processing, 2012In this paper, we introduce a digital implementation of the 3-D shearlet transform and illustrate its application to problems of video denoising and enhancement. The shearlet representation is a multiscale pyramid of well-localized waveforms defined at various locations and orientations, which was introduced to overcome the limitations of traditional ...
Demetrio Labate, Pooran Singh Negi
exaly +4 more sources
THE UNCERTAINTY PRINCIPLE ASSOCIATED WITH THE CONTINUOUS SHEARLET TRANSFORM
International Journal of Wavelets, Multiresolution and Information Processing, 2008Finding optimal representations of signals in higher dimensions, in particular directional representations, is currently the subject of intensive research. Since the classical wavelet transform does not provide precise directional information in the sense of resolving the wavefront set, several new representation systems were proposed in the past ...
Stephan Dahlke +5 more
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On the shearlet transform using hyperbolic functions
2014Summary: In this paper, we focus on the study of shearlet transform which is defined by using the hyperbolic functions. As a result, we check an admissibility condition such that implies the reconstruction formula. To this end, we use the concept of the classical shearlet, which indicates the position and direction of a singularity.
Zare, Masoumeh +2 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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Discrete linear canonical shearlet transform
International Journal of Wavelets, Multiresolution and Information ProcessingIn this paper, we introduce the continuous and discrete version of the linear canonical shearlet transform (LCST). The authors begin with the definition of the LCST and then establish a relationship between the linear canonical transform (LCT) and the LCST.
Younis Ahmad Bhat, Neyaz A. Sheikh
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A saliency detection model using shearlet transform
Multimedia Tools and Applications, 2014Visual attention is a mechanism to derive possible locations of objects or regions from natural scenes, and many studies have tried to simulate this mechanism to build saliency detection models, which would accelerate the course of many applications, such as object location, detection and recognition, image segmentation, retrieval and so on.
Lei Bao +3 more
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The Radon transform intertwines wavelets and shearlets
Applied and Computational Harmonic Analysis, 2019zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Bartolucci, Francesca +3 more
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