Results 51 to 60 of about 1,320 (180)
Open Physics, 2016 Image steganography is one of the ever growing computational approaches which has found its application in many fields. The frequency domain techniques are highly preferred for image steganography applications.
Jude Hemanth Duraisamy +3 more
doaj +1 more source
Wavelets, ridgelets and curvelets on the sphere [PDF]
, 2005 We present in this paper new multiscale transforms on the sphere, namely the isotropic undecimated wavelet transform, the pyramidal wavelet transform, the ridgelet transform and the curvelet transform. All of these transforms can be inverted i.e.
Aghanim +33 more
core +2 more sources
Face recognition based on ridgelet transforms
Procedia Computer Science, 2010 AbstractThis paper relates to a face recognition and verification technique based on ridgelet transforms. Our proposed method first uses the ridgelet transform of the face image for feature extraction. This involves first applying a sequen- tial combination of radon and wavelet transforms to both the training and test images.
Satyajit N. Kautkar +5 more
openaire +1 more source
Multi-resolution shape-based image retrieval using Ridgelet transform [PDF]
, 2014 Complicated shapes can be effectively characterized using multi-resolution descriptors. One popular method is the Ridgelet transform which has enjoyed very little exposure in describing shapes for Content-based Image Retrieval (CBIR).
Ahmad, Fatimah +2 more
core +1 more source
, 2009 International audienceDespite the fact that wavelets have had a wide impact in image processing, they fail to efficiently represent objects with highly anisotropic elements such as lines or curvilinear structures (e.g. edges). The reason is that wavelets
Fadili, Jalal M., Starck, Jean-Luc
core +3 more sources
Detection and discrimination of cosmological non-Gaussian signatures by multi-scale methods
, 2003 Recent Cosmic Microwave Background (CMB) observations indicate that the temperature anisotropies arise from quantum fluctuations in the inflationary scenario. In the simplest inflationary models, the distribution of CMB temperature fluctuations should be
Aghanim +33 more
core +2 more sources
Very high quality image restoration by combining wavelets and curvelets [PDF]
, 2001 We outline digital implementations of two newly developed multiscale representation systems, namely, the ridgelet and curvelet transforms. We apply these digital transforms to the problem of restoring an image from noisy data and compare our results with
Candès, E. J. +2 more
core +1 more source
, 2010 Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic feld that can produce adverse space weather at Earth and other locations in the Heliosphere.
Aschwanden +30 more
core +1 more source
The framework of P systems applied to solve optimal watermarking problem [PDF]
, 2014 Membrane computing (known as P systems) is a novel class of distributed parallel computing models inspired by the structure and functioning of living cells and organs, and its application to the real-world problems has become a hot topic in recent years.
Peng, Hong +3 more
core +1 more source
Active Seismic Exploration of Planetary Subsurfaces via Compressive Sensing
Earth and Space Science, Volume 12, Issue 3, March 2025.Abstract Geophysical measurements, such as seismic experiments, are a key target for scientific activities on planetary surfaces. Dense spatial sampling of such measurements is often desirable, and acquisition is traditionally performed at regular intervals.
Jingchuan Wang +16 more
wiley +1 more source