Document authenticity discriminating apparatus and method therefor

A document authenticity discriminating apparatus for discriminating authenticity of a document, comprising

• plural kinds of light sources having different wavelengths;
• pickup means for receiving both transmitted light produced upon transmission of light from the plural kinds of light sources through the document and reflected light produced upon reflection of the light from the document to pick up the document;
• calculating means for calculating feature quantities of a plurality of predetermined portions of the document being discriminated, from pickup picture images picked up by light source with the use of the pickup means;
• storage means for storing feature functions for extraction of genuine degrees. found from those reference feature quantities of a reference document, which are calculated by means of the calculating means;
• and
• genuine degree extracting means for performing numeric conversion and calculation of genuine degrees by light source from the feature quantities of the document being discriminated, calculated by the calculating means, and the feature functions stored beforehand in the storage means, and multiplying the calculated genuine degrees to extract genuine degrees.

A method of discriminating authenticity of a document, comprising

• transmitting or reflecting plural kinds of light sources having different wavelengths on to a document to be authenticated;
• receiving at least one of the transmitted light produced upon transmission of light from the plural kinds of light sources through the document and the reflected light produced upon reflection of the light from the document to pick up the document using a pickup means;
• calculating feature quantities of a plurality of predetermined portions of the document being discriminated, from images picked up by the light source in the pickup step;
• storing feature functions for extraction of genuine degrees found from those reference feature quantities of a reference document, which are calculated in the calculating step;
• and
• extracting genuine degrees of the document being discriminated, from the feature quantities of the document being discriminated, calculated in the calculating step, and the feature functions stored beforehand in the storage step.

A method of discriminating authenticity of a document, comprising

• transmitting or reflecting plural kinds of light sources having different wavelengths;
• receiving both transmitted light produced upon transmission of light from the plural kinds of light sources through the document and reflected light produced upon reflection of the light from the document to pick up the document using a pickup means;
• calculating feature quantities of a plurality of predetermined portions of the document being discriminated, from pickup picture images picked up by light source in the pickup step;
• storing feature functions for extraction of genuine degrees found from those reference feature quantities of a reference document, which are calculated the calculating step;
• and
• performing numeric conversion and calculation of genuine degrees by light source from the feature quantities of the document being discriminated, calculated in the calculating step, and the feature functions stored beforehand in the storage step, and multiplying the calculated genuine degrees to extract genuine degrees of the document being discriminated.