The INFRAREDESIGN® is introduced into the fabric dyeing technology in order to give a new dimension to security cameras in urban areas. The visible pattern of colors also contains a carefully designed hidden image. The hidden image is detected instrumentally in the infrared area. The arrangement of pigments on the fabric is determined using computer graphics by programming dual, "twin" colorants. Recipes for ink components consisting of colorants cyan, magenta, yellow and black are proposed in this article. The inks differ in monochromatic photography in the near-infrared spectrum. The clothes have two images, two independent pieces of information. One is intended for the visible spectrum and can be seen with the naked eye in daylight. The other image is separated (detected) with a camera which "sees" the intended infrared graphics. Cameras in the streets of our cities observe the environment during the day and night. Through the lens of the "night camera", the interested observer discovers messages designed on his or her favorite brand. The clothes are given new value in the eyes of the observer; the brand is elevated to a new level of "dual communication". Security print is a combination of vector and pixel graphics which manifests itself in the visible and near-infrared spectrum.
The focus of this paper is the introduction of new security elements into the authenticity of information on documents which concern the traceability of products. This article proposes dual marking using the infrared printing technology, which involves differences between the visible and infrared spectrum and separate detection of certain information with an infrared camera. Each meat product is assigned a unique designation, embedded in the document and hidden from the naked eye, in order to prevent changing, scanning or modifying with currently known techniques. A product receives a certificate with a security approval which carries information about the complete traceability of the product. A new central data registry which collects information from all necessary sources is proposed. The web portal and the accompanying database are designed to work in the cloud. The security of the exchange of data between the server and the user is ensured. The information about the traceability and the delineation between the visible and infrared hidden are approved and coordinated by the relevant authorities, breeders, distributors and sellers. The design of the entire information presents completely transparent information about the products to the end consumer.
The overpainted layers reveal the artist�s working process, the way he created his work in different phases until the final painting. Photographing paintings in near-infrared spectrum (NIR/IR reflectography) also provides protection against counterfeit art paintings. This paper investigates the intrinsic properties of colorant twins based on the InfraredArt theory, which expands the knowledge about the light absorption response in the visual (V) and near-infrared spectrum (NIR). The key support for the establishment of such paper is in the infrared procedure which explores new possibilities of restorative retouching based on the interrogation of pigment (color) and determination of its Z value. An extended method of restorative retouching is being studied that can equalize the reflection and/or intentionally make it different in the visible also in the near IR spectrum. This can be one of the retouching methods of restoring to the original state, not only the painting visible to the naked eye but also the overpainting or underpainting drawing, thus obtaining a new method in the final stage of retouching. This method of retouching can be applied to damaged artistically significant and historically important paintings that have interesting copies in the genesis of the painting that are visible under IR light. In addition, the method is also applicable to contemporary InfraredArt paintings that conceal a hidden painting, i.e. which artists have intentionally painted in the lower layer with the intention of being detected and observed by an IR camera. For the study a ZRGB camera was used, that simultaneously records in two spectra, visible and near-infrared areas. Two paintings from two Zagreb museums were conserved and restored in such a way that they confirm the established theses on targeted visible and invisible retouching.
In this paper, we publish the algorithm to create a dual image manifested in the infrared and visible spectrum. To distinguish the information in the two light spectra, twin dyes are introduced for the inkjet plotter and printing realization for garment and canvas items. The graphics, invisible to the naked eye, are designed for the near infrared (NIR) spectrum and are suitable for urban security where surveillance cameras with IR detectors are installed. The duality of dyes is presented in tables, and the analysis is a basis for programming and developing new algorithms for the application of “Infrared Dyeing” on different materials and printing technologies. Through spectroscopy, this innovative solution demonstrates twin colorants by printing in one pass through the plotter such that one image remains visible, while the other one is hidden to the bare eye. The uniform and the school bag cover presented in this paper are kept simple in design because they incorporate information hidden to the naked eye but visible with surveillance cameras and all the other infrared detectors. The article provides mathematical models of duality coloring as a basis for programming the graphic prepress that merges both of the images, the visual one and the infrared one. A topic is the fusion of two images with colors that represent two graphs, with independent contents for the visual and near-infrared spectrum.
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