Naslov
Managing pixel deformation with pseudo-random values in infrared security graphics

Autori
Stanić Loknar, Nikolina ; Žiljak Stanimirović, Ivana ; Koren, Tajana

Izvornik
TTEM - Technics technologies education management (1840-1503) 8 (2013), 1; 59-69

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
image element ; pixel deformation ; stochastic in graphics ; infrared graphics

Sažetak
Image element individualization is introduced into document security graphics. Pixel deformation procedures have been set up ; their translation and parameters defining the rhomboidal pixel have been set with pseudo-random variables. Each image element is elaborated individually, independently of other pixels, or they are treated as a group with a program code embedded in the graphic program. Algorithms are given in the paper for geometrical reshaping of pixels with transformation into varying shapes. In the field of polychromous reproduction pixel deformation becomes an individual and safe solution in security printing with successful avoiding of the moire effect. An individual congruent sequence is set for each colorant channel with a separation that includes the characteristics of infrared printing inks. Recognition of the independent graphic that needs to be invisible in the visual specter is avoided with randomly reshaped pixels. As a digital record the pixel is designed to be 1, 2, 4, or 8-bit in the same document. The result of pixel deformation is that the pixels overlay each other, producing thereby unique solutions in the field of security graphics.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija

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