Object authentication

摘要

A device detects multi-spectral imaging by using scan elements. The device may include an illumination module and a detection module to detect light scattered from an object illuminated by the illumination module. The device may also include an array of light sources to produce light at a plurality of different wavelengths, and create a line of illumination with each of the different wavelengths. The light detection may be applied to authenticate and validate documents, such as banknotes moving along a document conveyer.

主权项

1. A method for authenticating an object, comprising:
illuminating the object with a plurality of wavelengths of light from a plurality of light-emitting sources; detecting light scattered from the illuminated object with a plurality of photodiodes to create a multi-spectral image of at least a specified portion of the illuminated object, wherein the plurality of light-emitting sources and the plurality of photodiodes are optically coupled such that the plurality of wavelengths of light are simultaneously directed to the plurality of photodiodes; producing a reflectance spectrum from the multi-spectral image, wherein the producing the reflectance spectrum from the multi-spectral image further comprises finding pixels of a specified feature on the object and averaging their intensity values; comparing the reflectance spectrum to a template reflectance spectrum of an authentic object; and determining if the illuminated object is authentic as a function of the comparison.