Results 121 to 130 of about 123,647 (323)

Computational ghost imaging with hybrid transforms by integrating Hadamard, discrete cosine, and Haar matrices [PDF]

A scenario of ghost imaging with hybrid transform approach is proposed by integrating Hadamard, discrete cosine, and Haar matrices. The measurement matrix is formed by the Kronecker product of the two different transform matrices.
Zhang, Su-Heng, Cao, De-Zhong, Wang, Chong, Zhao, Yi-Ning, Chen, Lin-Shan, Chen, Liu-Ya, Kong, Lingxin, Ren, Cheng   +7 more
core   +1 more source

An efficient algorithm for computing two-dimensional discrete cosine transforms [PDF]

, 1991
A fast algorithm for computing the two-dimensional discrete cosine transform (2-D DCT) is proposed. In this algorithm the 2-D DCT is converted into a form of 2-D DFT (discrete Fourier transform) which is called the odd DFT.
Crebbin, G., Ta, N., Attikiouzel, Y.
core  

An exciting Approach to Theoretical Spectroscopy

Advanced Science, EarlyView.
ABSTRACT Theoretical spectroscopy, and more generally, electronic‐structure theory, are powerful concepts for describing the complex many‐body interactions in materials. They cover methods from ground‐state properties to lattice excitations and light‐matter interaction, including time‐resolved variants.
Martí Raya‐Moreno, Alexander Buccheri, Noah Alexy Dasch, Nasrin Farahani, Ignacio Gonzalez Oliva, Andris Gulans, Seokhyun Hong, Manoar Hossain, Hannah Kleine, Martin Kuban, Sven Lubeck, Benedikt Maurer, Pasquale Pavone, Fabian Peschel, Daria Popova‐Gorelova, Lu Qiao, Elias Richter, Santiago Rigamonti, Ronaldo Rodrigues Pela, Maximilian Schebek, Kshitij Sinha, Daniel T. Speckhard, Jan Stutz, Sebastian Tillack, Dmitry Tumakov, Jānis Užulis, Mara Voiculescu, Cecilia Vona, Mao Yang, Claudia Draxl   +29 more
wiley   +1 more source

Novel wavelet and discrete cosine transform-based watermarking technique using image partition [PDF]

, 2015
There is a significant issue with being able to protect digital media using contemporary advancements in communication technology. One way to do so involves selecting and embedding the owner’s trademark into the protected image in order to reinforce the ...
Abdo, Ahmed Hamdy
core   +2 more sources

Low‐resolution face recognition in uses of multiple‐size discrete cosine transforms and selective Gaussian mixture models

IET Computer Vision, 2014
Owing to losing the detailed information, the low‐resolution problem in face recognition degrades the recognition performance dramatically. To overcome this problem, a novel face‐recognition system has been proposed, consisting of the extracted feature ...
Shih‐Ming Huang, Yang‐Ting Chou, Jar‐Ferr Yang   +2 more
doaj   +1 more source

Physics‐Informed Neural Network‐Enabled Forward Prediction and Inverse Design of Ring Origami

Advanced Science, EarlyView.
This work presents a KRT‐PINN framework that integrates Kirchhoff rod theory with physics‐informed neural networks for the forward prediction and inverse design of ring origami consisting of closed‐loop rods. The framework predicts stable states of segmented rings with prescribed natural‐curvature profiles and determines the natural‐curvature profiles ...
Luyuan Ning, Lu Lu, Sophie Leanza, Ruike Renee Zhao   +3 more
wiley   +1 more source

Wearable‐Derived Diurnal Alignment Between Physical Activity and Device Temperature Predicts Future Disease and Mortality Risk

Advanced Science, EarlyView.
Wearable‐derived diurnal alignment between physical activity and device temperature, decomposed into 24 h coupling strength (M24), phase deviation (D24), and 12 h harmonic magnitude (M12), is examined in approximately 90,000 UK Biobank participants.
Han Chen, Jiahe Wei, Jonathan Cedernaes, Christian Benedict, Athanasios Tsanas, Zhi Cao, Xiao Tan   +6 more
wiley   +1 more source

Numerical Stability of Fast Trigonometric Transforms [PDF]

, 2003
This paper presents stability results for various fast trigonometric transforms. We consider the numerical stability of the classical fast Fourier transform (FFT) with respect to different precomputation methods for the involved twiddle factors and show ...
Manfred Tasche, Daniel Potts, Gabriele Steidl   +2 more
core  

Hardware‐Attentive Programmable Fourier Ptychography Enables Task‐Adaptive Label‐Free Virtual Staining

Advanced Science, EarlyView.
Task‐adaptive programmable optics enables label‐free virtual staining through optical‐attention‐guided acquisition and reconstruction. By optimizing wavelength, illumination angle, exposure time, and imaging depth, the framework learns task‐relevant optical measurements, generating clinically interpretable virtual stains with improved fidelity, non ...
Tianyue He, Wenyi Jing, Le Zhang, Qican Zhang, Tingdong Kou, Xin He, Yan Qiu, Yang Lu, Jian Cui, Yongfu Wen, Zhenrong Zheng, Hongying Zhang, Dayong Jin, Junfei Shen   +13 more
wiley   +1 more source

A Pressure Projection Scheme With Near‐Spectral Accuracy for Nonhydrostatic Flow in Domains With Open Boundaries

Journal of Advances in Modeling Earth Systems
We describe a pressure projection scheme for the simulation of incompressible flow in cubic domains with open boundaries based on fast Fourier transforms. The scheme is implemented in flow_solve, a numerical code designed for process studies of rotating,
K. B. Winters, Mariona Claret, M.‐Pascale Lelong, Yann Ourmières   +3 more
doaj   +1 more source