In this paper we review a number of optical image encryption techniques proposed in the
literature inspired by the architecture of the classic optical Double Random Phase Encoding …

A lensless optical security system based on double random-phase encoding in the Fresnel
domain is proposed. This technique can encrypt a primary image to random noise by use of …

Here we present a fast algorithm for Fresnel integral calculation. Some fast algorithms using
the fast Fourier transform are analysed and their performance has been checked. These …

pyDHM is an open-source Python library aimed at Digital Holographic Microscopy (DHM)
applications. The pyDHM is a user-friendly library written in the robust programming …

By use of matrix-based techniques it is shown how the space–bandwidth product (SBP) of a
signal, as indicated by the location of the signal energy in the Wigner distribution function …

In a double random-phase encoding system operating in the Fresnel domain, the recovered
image would become meaningless noise when the random phase masks shifted sufficiently …

We deal with the problem of efficient and accurate digital computation of the samples of the
linear canonical transform (LCT) of a function, from the samples of the original function. Two …

The linear canonical transform (LCT) describes the effect of any quadratic phase system
(QPS) on an input optical wave field. Special cases of the LCT include the fractional Fourier …

The advantages of using a telecentric imaging system in digital holographic microscopy
(DHM) to study biological specimens are highlighted. To this end, the performances of …

We develop a novel method to generate hologram of three-dimensional (3D) textured
triangle-mesh-model that is reconstructed from ordinary digital photos. This method allows …