Results 41 to 50 of about 14,780,830 (367)

Visual Saliency Based on Scale-Space Analysis in the Frequency Domain [PDF]

IEEE Transactions on Pattern Analysis and Machine Intelligence, 2013
We address the issue of visual saliency from three perspectives. First, we consider saliency detection as a frequency domain analysis problem. Second, we achieve this by employing the concept of nonsaliency.
Jian Li, M. Levine, X. An, Xin Xu, Hangen He   +4 more
semanticscholar   +1 more source

Gauging Newton's Law

, 2003
We derive both Lagrangian and Hamiltonian mechanics as gauge theories of Newtonian mechanics. Systematic development of the distinct symmetries of dynamics and measurement suggest that gauge theory may be motivated as a reconciliation of dynamics with ...
Anderson, Anderson J.T., Ivanov, James T Wheeler, Ne'eman T., Ne'eman T., S.W. Hawking and G.F.R. Ellis. The large scale structure of space-time. Cambridge University Press, Wehner J.T.   +7 more
core   +1 more source

Automated Reconstruction of Building LoDs from Airborne LiDAR Point Clouds Using an Improved Morphological Scale Space

Remote Sensing, 2016
Reconstructing building models at different levels of detail (LoDs) from airborne laser scanning point clouds is urgently needed for wide application as this method can balance between the user’s requirements and economic costs.
Bisheng Yang, Ronggang Huang, Jianping Li, M. Tian, Wenxia Dai, Ruofei Zhong   +5 more
semanticscholar   +1 more source

A robust nonlinear scale space change detection approach for SAR images [PDF]

, 2013
In this paper, we propose a change detection approach based on nonlinear scale space analysis of change images for robust detection of various changes incurred by natural phenomena and/or human activities in Synthetic Aperture Radar (SAR) images using ...
Demirkesen, Can, Nar, Fatih, Okman, O. Erman, Sevilmiş, Berk, Çetin, Müjdat   +4 more
core   +1 more source

Fast Frequency Estimation by Zero Crossings of Differential Spline Wavelet Transform

EURASIP Journal on Advances in Signal Processing, 2005
Zero crossings or extrema of a wavelet transform constitute important signatures for signal analysis with the advantage of great simplicity. In this paper, we introduce a fast frequency-estimation method based on zero-crossing counting in the transform ...
Chen Jie, Wu Qiang, Castleman Kenneth R, Wang Yu-Ping   +3 more
doaj   +1 more source

Approximation properties relative to continuous scale space for hybrid discretisations of Gaussian derivative operators

Frontiers in Signal Processing
This paper presents an analysis of properties of two hybrid discretisation methods for Gaussian derivatives, based on convolutions with either the normalised sampled Gaussian kernel or the integrated Gaussian kernel followed by central differences.
Tony Lindeberg
doaj   +1 more source

Measuring Large Scale Space Perception in Literary Texts

, 2006
The center and radius of perception associated with a written text are defined, and algorithms for their computation are presented. Indicators for anisotropy in large scale space perception are introduced.
Rossi, Paolo
core   +2 more sources

Research on Fault Diagnosis of Rolling Bearing Based on Morlet Wavelet and Scale Space

机车电传动, 2021
Aiming at the difficulty of extracting the early fault features of rolling bearings, a rolling bearing fault diagnosis method based on Morlet wavelet and scale space was proposed.
Maohui WANG, Yong TANG, Haixiang LI, Ping YANG   +3 more
doaj  

Scale and space dependencies of soil nitrogen variability [PDF]

Nonlinear Processes in Geophysics, 2017
In this study, we use multifractal analysis, through generalized dimensions (Dq) and the relative entropy (E(δ)), to investigate the residual effects of fertigation treatments applied to a previous crop on wheat and grain biomass and nitrogen content ...
A. M. Tarquis, M. T. Castellanos, M. C. Cartagena, A. Arce, F. Ribas, M. J. Cabello, J. L. de Herrera, N. R. A. Bird   +7 more
doaj   +1 more source

Combining transient dynamics and logistic‐asymptotic growth to study the recovery of two seabird populations after rat eradication

Population Ecology, EarlyView.
This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier, Christophe Barbraud, Maxime Amy, Sabine Orlowski, Jean Hivert, Gabrielle Dicque, Matthieu Le Corre   +6 more
wiley   +1 more source