A General Weighted Multi-scale Method for Improving LBP for Face Recognition

In this paper, a novel approach derived from image gradient domain called multi-scale gradient faces (MGF) is proposed to abstract multi-scale illumination-insensitive measure for face recognition. MGF applies multi-scale analysis on image gradient information, which can discover underlying inherent structure in images and keep the details at most while removing varying lighting. The proposed approach provides state-of-the-art performance on Extended YaleB and PIE: Recognition rates of 99.11% achieved on PIE database and 99.38% achieved on YaleB which outperforms most existing approaches. Furthermore, the experimental results on noised Yale-B validate that MGF is more robust to image noise.

Download Full-text

Wavelet Multi-Scale Solution for Deflection of Thin Rectangular Plates under Temperature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.166-169.2871 ◽

2012 ◽

Vol 166-169 ◽

pp. 2871-2875

Author(s):

Yan Chang Wang ◽

Ke Liang Ren ◽

Yan Dong ◽

Ming Guang Wu

Keyword(s):

Differential Equations ◽

Rectangular Plate ◽

Thermal Environment ◽

Operational Matrix ◽

Rectangular Plates ◽

Thin Rectangular Plate ◽

Multi Scale ◽

Scale Method ◽

The Matrix ◽

Operational Matrix Of Integration

To consider the deformation of thin rectangular plate under temperature. In this paper, the wavelet multi-scale method was used to solve the thin plate governing differential equations with four different initial or boundary conditions. An operational matrix of integration based on the wavelet was established and the procedure for applying the matrix to solve the differential equations was formulated, and got the deflection of thin rectangular plates under temperature. The result provides a theoretical reference for solving thin rectangular plate deflection in thermal environment using multi-scale approach.

Download Full-text

Electrokinetic Research on the Dispersion Behavior of Nano-Ceria Particles in Concentrated Suspensions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.645-646.394 ◽

2015 ◽

Vol 645-646 ◽

pp. 394-399

Author(s):

Wei Gao ◽

Qi Long Wei ◽

Ling Ding ◽

Xiao Yuan Li ◽

Chao Wang ◽

...

Keyword(s):

Zeta Potential ◽

Rheological Properties ◽

Concentrated Suspensions ◽

Tem Analysis ◽

Concentrated Suspension ◽

Original Solution ◽

Multi Scale ◽

Scale Method ◽

Dispersion Behavior ◽

Significant Difference

A multi-scale method was developed, which utilized intrinsic relationships among zeta potential of particles, rheological properties of suspensions and particle size distribution (PSD), to analyze dispersion behavior of nanoparticles in concentrated suspensions. It was found that PSD of a kind of nanoceria particles by dynamic light scattering (DLS) method in solution A with concentration 5 wt% accorded well with that by direct TEM analysis, which meant the particles had been dispersed well. However, there had a significant difference when the concentration was increased to 20 wt%. When particles concentration increased from 5 wt% to 20 wt%, zeta potential in solution A changed from-150 mV to-100 mV, while zeta potential in solution B changed from-35mV to-45 mV. Variations of zeta potential of particles accorded well with rheological properties of suspensions too, from phenomenological models. When the suspensions composed by solution A and the nanoparticles with concentration about 20 wt% was diluted with its original solution to 5 wt%, the PSD of nanoceria could be measured indirectly, which accorded well with both that of a suspension prepared directly with near concentration and that from TEM images. Then a method to measure PSD of nanoparticles in concentrated suspension was brought forward.

Download Full-text