Results 91 to 100 of about 34,743 (255)

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

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

Enhancing Tool Wear Prediction Accuracy Using Walsh-Hadamard Transform, DCGAN and Dragonfly Algorithm-Based Feature Selection. [PDF]

Sensors (Basel), 2023
Shah M, Borade H, Sanghavi V, Purohit A, Wankhede V, Vakharia V.   +5 more
europepmc   +1 more source

Untangling US Employment Changes: Production Technology Versus Trade Structure

Review of International Economics, EarlyView.
ABSTRACT This paper quantifies how much trade structure and production technology changes contribute to US employment changes. We apply a structural decomposition analysis (SDA) to global input–output tables. SDA extends the conventional shift‐share analysis and splits employment changes into the contributions by several drivers.
Hylke Dijkstra, Erik Dietzenbacher
wiley   +1 more source

Application of Enhanced Hadamard Error Correcting Code in Video-Watermarking and his comparison to Reed-Solomon Code

MATEC Web of Conferences, 2017
Error Correcting Codes are playing a very important role in Video Watermarking technology. Because of very high compression rate (about 1:200) normally the watermarks can barely survive such massive attacks, despite very sophisticated embedding ...
Dziech Andrzej, Wassermann Jakob
doaj   +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

Systematic errors in Hadamard transform optics [PDF]

, 1978
N. J. A. Sloane, Martin Harwit, Ming-Hing Tai   +2 more
openalex   +1 more source

Sparse Fréchet sufficient dimension reduction with graphical structure among predictors

Scandinavian Journal of Statistics, EarlyView.
Abstract Fréchet regression has received considerable attention to model metric‐space valued responses that are complex and non‐Euclidean data, such as probability distributions and vectors on the unit sphere. However, existing Fréchet regression literature focuses on the classical setting where the predictor dimension is fixed, and the sample size ...
Jiaying Weng, Kai Tan, Cheng Wang, Zhou Yu   +3 more
wiley   +1 more source