Evaluation of amplitude encoded fringe patterns using the bidimensional empirical mode decomposition and the 2D Hilbert transform generalizations

M Wielgus, K Patorski - Applied optics, 2011 - opg.optica.org
We propose an application for a bidimensional empirical mode decomposition and a Hilbert
transform algorithm (BEMD-HT) in processing amplitude modulated fringe patterns. In …

Image hiding based on time-averaging moiré

M Ragulskis, A Aleksa - Optics Communications, 2009 - Elsevier
Image hiding based on optical time-averaging moiré technique is presented in this paper. It
is a new visual decoding scheme when the secret image is embedded into a moiré grating …

Visualization of additive-type moiré and time-average fringe patterns using the continuous wavelet transform

K Pokorski, K Patorski - Applied optics, 2010 - opg.optica.org
An application of the continuous wavelet transform to modulation extraction of additive moiré
fringes and time-average patterns is proposed. We present numerical studies of the …

Static moiré patterns in moving grids

V Saveljev, J Kim, JY Son, Y Kim, G Heo - Scientific Reports, 2020 - nature.com
We describe an optical phenomenon of unmovable moiré patterns in sliding (moving) grids
and gratings. The phenomenon was observed visually in the planar straight movement of …

Contrast enhancement of time-averaged fringes based on moving average mapping functions

M Ragulskis, A Aleksa, R Maskeliunas - Optics and Lasers in Engineering, 2009 - Elsevier
Moving average contrast enhancement techniques are applied for visualization of time-
averaged fringes produced by time average projection moiré. The complexity of the problem …

Time average geometric moiré—Back to the basics

M Ragulskis, Z Navickas - Experimental Mechanics, 2009 - Springer
Applicability of time average geometric moiré for elastic oscillating structures is analysed in
this paper. Mathematical and numerical models describing the formation of time averaged …

Dynamic visual cryptography for optical control of vibration generation equipment

V Petrauskiene, A Aleksa, A Fedaravicius… - Optics and Lasers in …, 2012 - Elsevier
An optical experimental technique based on dynamic visual cryptography is proposed for
the optical control of vibration generation equipment. A secret image is embedded into a …

Applicability of time-average moiré techniques for chaotic oscillations

M Ragulskis, MAF Sanjuan, L Saunoriene - Physical Review E—Statistical …, 2007 - APS
Applicability of time-average moiré techniques for chaotic oscillations is analyzed in this
paper. Envelope function characterizing the rate of convergence of time-averaged color …

Time-averaged patterns produced by stochastic moiré gratings

M Ragulskis - Computers & Graphics, 2009 - Elsevier
A simple computational algorithm is proposed for visualization of time-averaged moiré
fringes. Time-averaging numerical techniques can be exploited for the construction of a …

[PDF][PDF] Hash function construction based on time average moiré

M Ragulskis, Z Navickas - DISCRETE AND CONTINUOUS …, 2007 - minvydasragulskis.com
An algorithm for the construction of Hash function based on optical time average moiré
experimental technique is proposed in this paper. Algebraic structures of grayscale color …