Patent ID: 6553136
Filing Date: 2003-04-22
Classification: G06K

Abstract:
A system for counterfeit protection comprising:a host apparatus that processes an acquired input image; training means for deriving parameters from a plurality of templates and kernels, said templates being selected portions of a restricted-document image, said kernels having a rotation-invariant convolution characteristic; detecting means operatively coupled to said training means for determining whether said input image resembles said restricted-document image by utilizing said parameters, said detecting means being configured to compare relative positions of at least two template match candidates in said input image with relative positions of corresponding templates in said restricted-document image, each of said template match candidates being a portion of said input image that is preliminarily determined to correlate with one of said templates of said restricted-document image; and signaling means operatively coupled to said detecting means for transmitting a signal when a positive determination is made by said detecting means that said input image closely resembles said restricted-document image.