AbdulRahman Alsamman

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The efficiency eta(LC) of linear-to-circular polarization conversion when light is reflected at a dielectric-conductor interface is determined as a function of the principal angle phi and principal azimuth psi . Constant-eta(LC) contours are presented in the phi , psi plane for values of eta(LC) from 0.5 to 1.0 in steps of 0.05, and the corresponding(More)
A novel joint transform correlator (JTC) system is presented in which the stored reference image is phase encrypted prior to applying the JTC. The encryption disperses all the trivial correlation peaks in the correlator output. The reference image is encrypted electronically, which simplifies the need for a complex optical setup. The encryption removes the(More)
Conditions for reducing the reflectance of a dielectric-conductor interface for p- and s-polarized light to a minimum at any angle of incidence phi are determined. The refractive indices of a transparent immersion medium (liquid) that achieve minimum reflectance at normal incidence, phi=0, and at phi=45 degrees are independent of polarization. These indices(More)
For a given pseudo-Brewster angle phi(pB) of minimum reflectance |r(p)| of p-polarized light at a dielectric-conductor interface, the second-Brewster angle phi(2B) of minimum reflectance ratio |rho|=|r(p)|/|r(s)| of the p and s polarizations is determined for all possible values of the complex relative dielectric function epsilon that lead to the same(More)
Label-deficient semi-supervised learning is a challenging setting in which there is an abundance of unlabeled data but a dearth of labeled data. A hybrid network that mixes an autoencoder, capable of extracting information from unlabeled data, and a neural network classifier, which incorporates information from labeled data, can be useful in a(More)
Label-deficient semi-supervised learning is a challenging setting in which there is an abundance of unlabeled data but a dearth of labeled data. We propose a method for applying Gaussian process latent variable models (GPLVM) in a label-deficient setting, a method in which the discriminative GPLVM objective function trains a back-constraining neural network(More)
The angle of incidence ϕ=ϕ<sub>u min</sub> of minimum reflectance for incident unpolarized or circularly polarized light at a dielectric-conductor interface is determined for any complex relative refractive index N=(n,k), and contours of constant ϕ<sub>u min</sub> in the nk plane are presented. The minimum reflectance R<sub>u min</sub> at ϕ<sub>u min</sub>(More)
Face recognition based on principal component analysis (PCA) that uses eigenfaces is popular in face recognition markets. We present a comparison between various optoelectronic face recognition techniques and a PCA-based technique for face recognition. Computer simulations are used to study the effectiveness of the PCA-based technique, especially for facial(More)
The pseudo-Brewster angle phi(pB) of minimum reflectance for p-polarized light and the principal angle phi at which incident linearly polarized light of the proper azimuth is reflected circularly polarized are considered as functions of the complex relative dielectric function epsilon of a dielectric-conductor interface over the entire complex epsilon(More)
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