Applied Software Space-Frequency Processing of Graphic Information for Standardization of Printing Materials of Packaging Products

Abstract

We have proposed a new polarimetric method of Stokes polarimetry, which is more informative in terms of representing optically inhomogeneous structures by spatially coherent filtering. The idea of this approach is based on the spatial-frequency filtering of polarization images of optically inhomogeneous networks of polymer layers. The results of the development and experimental testing of a new Fourier method of polarimetry of spectral-frequency laser images, which are based on a statistical analysis of polarization distributions with the determination of a set of statistical parameters, are presented. The statistical moments of the fourth order are given, which characterize the distributions of the azimuth and ellipticity of the polarization. The presented experimental methods have shown the presence of a polarization-inhomogeneous structure of FOMC of real polycrystalline sets of polymers, and also confirmed the adequacy of the proposed model representation of their optically inhomogeneous properties. It is shown that different types of the birefringent structure of polymers of different types are characterized by different values of the 1st–4th order static moments. The difference between them reaches 3–4 times. A relationship is found between a set of statistical moments of the 1st - 4th orders, which characterize the coordinate distributions of the azimuth and ellipticity of the Fourier spectra of polyethylene samples, as well as the parameters of the optical anisotropy of such grids. The reason for the formation of the polarization structure of the Fourier spectra of laser images of polymer networks is the superposition of differently polarized partial coherent waves, which are formed by different-scale partial optically inhomogeneous molecular networks. The main mechanisms for the formation of azimuthal polarization distributions of the Fourier image are the ratios between 0–90 amplitude components, which are determined by the features of the spatial-frequency spectra of molecular crystals with different types of birefringence. The main mechanisms in the formation of distributions of polarization ellipticity maps are phase modulation, which is due to both the birefringence of molecular crystals and the optical characteristics of interfering partial waves.

Keywords

• applied programming
• packaging materials
• materials science
• graphic information processing
• metrology and standardization
• publishing and printing