Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi !

Design of Security Graphics with Infrared Colours (CROSBI ID 158330)

Prilog u časopisu | izvorni znanstveni rad

Žiljak, Ivana ; Žiljak-Vujić, Jana ; Pap, Klaudio Design of Security Graphics with Infrared Colours // International circular of graphic education and research, 2 (2009), 24-31

Podaci o odgovornosti

Žiljak, Ivana ; Žiljak-Vujić, Jana ; Pap, Klaudio

engleski

Design of Security Graphics with Infrared Colours

The color tone defined in RGB, HSB and Lab systems may be defined through CO MO YO KO seen by the human eye but invisible in IR wave lengths. This color tone may be associated with the CI Mi Yi Ki more broadly seen in wavelengths of the visible spectrum as well as in IR wavelengths. The Cm Mm Ym Km maximum possible response in the IR area is determined for every color. The double separation program uses two images. The first image is the one we see fully in the visible specter part. The second image is the pattern that has the role of a mask. The CMYK separation is controlled with the pattern in order to achieve the appearance and elimination of the first image's visibility in the IR area. The image element covering halftone values of the second image most often equals to zero or to the maximum value. All halftone values that fall into the area between the two listed extremes enable visibility gradation control in the IR specter. Each single color tone has its own gradient values for CMY components depending on the K component increase. Each components gradient depends on the C, M and Y values that compose the observed color. The paper contains the gradient coefficient matrix with three independent variables for each color. The parameter values are proven by linear regression and on basis of print measuring. The once determined gradient parameters for the observed printing technique and the corresponding process colors provide unlimited application of IR control in colored images by using only process toners.

Design ; Security ; Graphics ; Infrared ; Colours

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

2

2009.

24-31

objavljeno

1868-0712

1868-0879

Povezanost rada

Grafička tehnologija, Računarstvo, Informacijske i komunikacijske znanosti