Biblio

High-precision scanners, copiers and other equipment to copy the image compared with the original, you can achieve a very realistic effect. There is a certain threat to the copyright of the manuscript. In view of this phenomenon, a design method of metameric security images with anti-counterfeiting and anti-copy function is presented on this paper. Metameric security images are designed and printed by the theory of metameric color and the four-color ink spectral characteristics. The realization of anti-counterfeiting function is based on the difference of K ink content in proportion of CMYK. In the metameric security images, trademark image display for the CMYK color, and visible under the sunlight. Anti-counterfeiting images appear as monochrome K ink, and visible under the infrared. The experimental results show that the metameric security images with infrared detection device and its characteristics under the infrared light source are observed the clear hidden information. It realizes the anti-counterfeiting function. The method can be applied to various industries in the trademark image security.