Zoltán Fazekas

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The optical behaviour of the (human) cornea is often characterized with the Zernike-coefficients derived via the Zernike-transform of its optical power map. In this paper, a radial transform based on the Chebyshev-polynomials of the second kind is suggested for a surface-based, rather than an optical power map based representation of the cornea. This(More)
The even Chebyshev-polynomials of the second kind – modified with appropriate argument-transforms – were used to describe quasi-hemispherical and calotte-like natural surfaces over a set of discrete points – and via interpolation – between these points. The point-set used was selected in a manner that promotes the proper approximation of such surfaces and(More)
The optical behaviour of the human eye is often characterized with the Zernike coefficients. Great number of measurements and statistical data are available for individuals and for various groups of people concerning the Zernike coefficients of their eyes. Although, these coefficients were obtained from measurements at discrete points and via computations(More)
The recent emergence of microblogs has had a significant effect on the contemporary political landscape. The platform’s potential to enhance information availability and make interactive discussions between politicians and citizens feasible is especially important. Existing studies focusing on politicians’ adoption of Twitter have found that far from(More)
Meshes of points over the unit disk were found some years ago that ensure the discrete orthogonality of the Zernike functions. These meshes are referred in the paper as generic Zernike meshes. Presently, however, the corneal surface points are measured, e.g., with reflection-based corneal topographers, and computed, with their respective built-in(More)
As safety and efficiency issues of transportation hand-in-hand with the intelligent vehicle concept – have gathered ground in the last few years in the automotive research community and have penetrated into the automotive industry, vision-based applications have become increasingly important in driver assistance systems (Kastrinaki et al., 2003; Bertozzi et(More)
A novel specular surface reconstruction approach developed for and used in an experimental multi-camera corneal topographer arrangement is presented in the paper. The tear-film coated, and therefore specular, corneal surface is mathematically reconstructed from the corneal images taken simultaneously by the calibrated cameras of the arrangement. The surface(More)
Objective assessment of fabric wrinkledness using multifractal methodology is addressed in the paper. As a first experiment with this methodology in this application field, AATCC standard durable press rating replicas, which are used by textile experts worldwide, were photographed and then segmented using common image processing methods. The resulting(More)
In this paper, we present an efficient lane detection and tracking algorithm for wide-baseline stereo vision systems with cameras mounted on the host vehicle. The main purposes of the vision system are host vehicle localization and lane shape recognition for advanced driver assistance tasks on highways and country roads with visible lane boundary markings.(More)