AUTHENTICATION OF NORMAN ROCKWELL PAINTINGS

摘要

A process for authenticating a painting includes determining whether a posterized HSV model of a digital photograph contains one or more steganographic symbols. A process for preparing a painting for authentication, includes providing a digital photograph of the painting in the RGB color model, converting the digital photograph to a CMYK color model, converting the CMYK model of the digital photograph to an HSV color model of the digital photograph and posterizing the HSV model of the digital photograph. A system for preparing a painting for authentication includes a processor and a computer-readable memory component containing a digital photograph of the painting in the RGB color model. The processor is configured to convert the digital photograph to a CMYK color model, convert the CMYK model of the digital photograph to an HSV color model of the digital photograph and posterize the HSV model of the digital photograph.