Photorefractive materials combine photoconductive and electro-optic properties: light affects
their electrical conductivity; their optical properties (refractive index, etc.) are affected by …

The wavelet transform has found a lot of uses in the field of optics. We present an
experimental realization of employing variant wavelet filters into the object space of a …

We have investigated a real-time photorefractive joint transform correlator (JTC) with a bank
of wavelet filters. In the experimental set-up, a photorefractive crystal BSO has been used as …

The technique of moving gratings in a photorefractive crystal is applied to the edge
enhancement of objects and edge-enhanced optical correlation. The nonlinear dependence …

The process of selecting a small number of representative colors from an image of higher
color resolution is called color image quantization. The ultimate goal of color image …

Optical bias has been applied in the formation of moving gratings in bismuth silicon oxide at
large fringe modulations. It is shown that optical bias is an effective method of overcoming …

The analysis of the results received during last 5 years in the field of light-sensitive
holographic recording media is presented. The lines of the improvement of these media for …

We present an experimental realization of optical correlation for real-time rotational-
invariance pattern recognition by means of a photorefractive joint transform correlator …

Based on the nonlinear property of the moving grating in BSO crystal in four-wave mixing
architecture at large fringe modulation, ie the enhancement of the reflectivity increases as …

The moving grating technique is applied to improve the holographic recording property of
the Ce: KNSBN crystal. In the case of extraordinarily polarized recording, the diffraction …