Results 91 to 100 of about 2,134,041 (173)

A Novel Autofocus Measure Based on Weighted Walsh-Hadamard Transform

IEEE Access, 2019
The autofocus measure plays an important role in passive digital imaging systems. However, most of the existing methods are more sensitive to the noise. In order to overcome this drawback, we proposed a novel autofocus measure based on the weighted Walsh-
Liqiang Guo, Xiang Cao, Lian Liu
doaj   +1 more source

Adaptive visible image watermarking based on Hadamard transform

IOP Conference Series: Materials Science and Engineering, 2018
One of the ways for implicit protection of rightful copyright information deals with application of visible watermark embedded in the host image. In this paper, we study behaviour of the proposed function, which makes the embedding of visible watermark ...
M. Favorskaya, E. Savchina, A. Popov
semanticscholar   +1 more source

Current and future perspectives for structural biology at the Grenoble EPN campus: a comprehensive overview

Journal of Synchrotron Radiation, EarlyView.
Details on the current status of the experimental techniques available at the ESRF–EBS and ILL research infrastructures are provided. Major contributions made by the EMBL, ESRF, ILL and IBS to the structural biology field are described, including future prospects at the EPN campusThe European Photon and Neutron campus in Grenoble is a unique site ...
Andrew A. McCarthy, Shibom Basu, Florent Bernaudat, Matthew P. Blakeley, Matthew W. Bowler, Philippe Carpentier, Gregory Effantin, Sylvain Engilberge, David Flot, Frank Gabel, Lukas Gajdos, Jos J. A. G. Kamps, Eaazhisai Kandiah, Romain Linares, Anne Martel, Igor Melnikov, Estelle Mossou, Christoph Mueller-Dieckmann, Max Nanao, Didier Nurizzo, Petra Pernot, Alexander Popov, Antoine Royant, Daniele de Sanctis, Guy Schoehn, Romain Talon, Mark D. Tully, Montserrat Soler-Lopez   +27 more
wiley   +1 more source

Transform coding of DCT coefficients in video encoder

Tongxin xuebao, 2008
The redundancy among discrete cosine transform（DCT） coefficients in video encoder was found very strong,a method for subband decomposition and transform coding was proposed.Each 8×8 DCT spectrum date of macroblock was regrouped to gather the same ...
WANG Zhong-yuan, HU Rui-min, TIAN Gang, LI Ming   +3 more
doaj   +2 more sources

Complex Hadamard matrices from Sylvester inverse orthogonal matrices [PDF]

arXiv, 2009
A novel method to obtain parametrizations of complex inverse orthogonal matrices is provided. These matrices are natural generalizations of complex Hadamard matrices which depend on non zero complex parameters. The method we use is via doubling the size of inverse complex conference matrices.
arxiv  

High‐resolution X‐ray scanning with a diffuse Huffman‐patterned probe to reduce radiation damage

Journal of Synchrotron Radiation, EarlyView.
This paper introduces high‐resolution imaging using diffuse probes, which allow for lower energy deposition per unit area per unit time, by encoding Huffman‐like patterns onto them, enabling a tighter impulse response. The approach, demonstrated in X‐ray imaging, involves using specially fabricated masks to shape the probe and recover sharp object ...
Alaleh Aminzadeh, Andrew M. Kingston, Lindon Roberts, David M. Paganin, Timothy C. Petersen, Imants D. Svalbe   +5 more
wiley   +1 more source

Matrix Factorization and Some Fast Discrete Transforms

Axioms
In this paper, three discrete transforms related to vector spaces over finite fields are studied. For our purposes, and according to the properties of the finite fields, the most suitable transforms are as follows: for binary fields, this is the Walsh ...
Iliya Bouyukliev, Mariya Dzhumalieva-Stoeva, Paskal Piperkov   +2 more
doaj   +1 more source

Second Hankel Determinant for a Class of Analytic Functions Defined by Fractional Derivative

International Journal of Mathematics and Mathematical Sciences, 2008
By making use of the fractional differential operator Ωzλ due to Owa and Srivastava, a class of analytic functions ℛλ(α,ρ)    (0≤ρ≤1,  0 ...
A. K. Mishra, P. Gochhayat
doaj   +1 more source

IMAGE COMPRESSION BY USING WALSH AND FRAMELET TRANSFORM

Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ, 2019
In this paper, Framelet and Walsh transform are proposed for transformation, and then using arithmetic coding for compress an image. The goal is to achieve higher compression ratio by applying two levels Framelet transform (FLT), and then apply 2D Walsh ...
Nora H. Sultan
doaj   +1 more source

Augury and Forerunner: Real‐Time Feedback Via Predictive Numerical Optimization and Input Prediction

Computer Graphics Forum, EarlyView.
Transient information generated by solver steps can inform future objective function minimization. In Augury, we explore the impact of predictive numerical optimization by using solver history to predict future minimization solutions, reducing computational resources needed to arrive at convergent states for a broad class of gradient‐based optimization
J. Graus, Y. Gingold
wiley   +1 more source