Work place: Information Systems and Networks Department, Lviv Polytechnic National University, Lviv, 79013, Ukraine
E-mail: mariia.a.nazarkevych@lpnu.ua
Website:
Research Interests:
Biography
Mariia Nazarkevych is a Full Professor, Doctor of Technical Sciences. She has a total work experience of 26 years, with 20 years of research experience. She is an expert in Machine Learning, security systems, biometric protection systems, Big Data, and Data Science. She is member of the scientific-methodical council and scientific-methodical commission (subcommission) of the Ministry of Education and Science of Ukraine. She participated in many research grants as a performer and supervisor. She has 250 scientific publications, of which 15 are related to the proposed project topic.
By Mariia Nazarkevych Victoria Vysotska Vasyl Lytvyn Yuriy Ushenko Dmytro Uhryn Zhengbing Hu
DOI: https://doi.org/10.5815/ijcnis.2025.02.04, Pub. Date: 8 Apr. 2025
A method of identification of original and fake prints has been developed. Security elements are printed using an offset printing method, which we will call original printing. In parallel, we will print bitmap security elements on copiers. We will call this process fake printing. Such types of rasterisation were developed to make the difference between an original print and a fake print visible to the naked eye. A method of detecting fake printing has also been developed by measuring the change in the percentage of raster dot, dot gain, trapping, optical density, ∆lab, and change in tonality. The protection of the printed document is created when the image is transformed by amplitude-modulated rasterisation based on the mathematical apparatus of Ateb-functions. During rasterisation, we create thin graphic elements that have different shapes and are calculated according to developed methods. The size of a single dot of a raster element depends on the selection of the rasterisation method and the tonal gradation value of each corresponding pixel in the image. During rasterisation, a raster structure is formed, in which the value of each raster element is related by the value of the Ateb-function with tonal gradation, as well as a change in the angle, lines and shapes of the curves of a single raster. We offer raster image printing on various paper samples that are widely used today.
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