engleski

CMYKIR separation of two portraits for postage stamp design

Based on extensive research conducted previously, a new design of postage stamp, with double image, visible and infrared, has been carried out and proposed with the innovative CMYKIR technology. This paper deals with the display of two graphics in a wide spectrum from 400 to 1000 nm. Due to limited physical space and dimensions of the postage stamp, different graphics are algorithmically mixed and printed as one image on the same sheet. Two images are detected with infrared camera. This technique enables richer graphics on stamps, cleaner design and adequate level of protection. Methods of design and processing of such images are extended and their composition is adjusted for application on postage stamp. In this study, we have introduced CMYK channels of the new graphic which contains one visible and one infrared portrait. In processing of RGB input image, the method of desaturation is applied which occurs in the separation of parts of the portraits that have similar tones of color. This function is introduced because it raises the level of grayness for achieving a certain degree of optimization of the contrast of input graphics, enabling and enhancing the results in the CMYKIR separation.

Postage stamp; Dual portrait; CMYKIR separation

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