Method and control device for document authentication
First Claim
1. A method of scanning in a control device an identity document or valuable document which includes an image of the document owner, or an image of a pattern significant to the valuable document, wherein the control device is connected with at least one data base containing information concerning the documents, comprising:
- scanning with the aid of said control device at least a part of the document which includes a part of the image or the whole of the image by recording in pixels with the aid of an optical device which includes a light source, the intensity of the light reflected by raster points of the image together with the intensity of the light reflected from raster points of at least one reference on the document, wherein the reflected light is recorded simultaneously, and wherein the recorded image includes information for reference to an original document in a data base;
dividing the recorded image into sub-areas which include at least two pixels wherein the scan is digitized and each of the pixels is given a bit sequence corresponding to the intensity of the light reflected for the pixels and coordinate-transforming the image such that the image will always have the same position in relation to said reference, this reference position also being the same for a corresponding document in at least one data base, wherein a document that is already stored in the data base is compared with a document whose authenticity is being checked or a non-registered document is newly registered in at least one data base automatically or manually via the control device, and wherein when scanning and comparing in a data base is relevant there is chosen prior to the comparison at least one sub-area or a limited number of sub-areas for verification with a corresponding sub-area or corresponding sub-areas related to the document in the relevant data base or data bases, whereafter non-selective sub-areas are sorted-out and, in the case of a new registration of the identity document or valuable document, the document is newly registered in at least one data base.
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Abstract
A document authentication control device has a card positioning device with a document insertion region, an optical scanner, a data processor that receives data from the optical scanner, a database for storing processed optical image data, and a display screen for displaying document, authentication, and other data. The data processor correlates an image region of a document and a reference region of the document to corresponding image and reference regions of the document retrieved from the database, thereby determining the authenticity of the document. The reference region is a region of the document that is spaced away from the image region of the document.
162 Citations
21 Claims
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1. A method of scanning in a control device an identity document or valuable document which includes an image of the document owner, or an image of a pattern significant to the valuable document, wherein the control device is connected with at least one data base containing information concerning the documents, comprising:
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scanning with the aid of said control device at least a part of the document which includes a part of the image or the whole of the image by recording in pixels with the aid of an optical device which includes a light source, the intensity of the light reflected by raster points of the image together with the intensity of the light reflected from raster points of at least one reference on the document, wherein the reflected light is recorded simultaneously, and wherein the recorded image includes information for reference to an original document in a data base; dividing the recorded image into sub-areas which include at least two pixels wherein the scan is digitized and each of the pixels is given a bit sequence corresponding to the intensity of the light reflected for the pixels and coordinate-transforming the image such that the image will always have the same position in relation to said reference, this reference position also being the same for a corresponding document in at least one data base, wherein a document that is already stored in the data base is compared with a document whose authenticity is being checked or a non-registered document is newly registered in at least one data base automatically or manually via the control device, and wherein when scanning and comparing in a data base is relevant there is chosen prior to the comparison at least one sub-area or a limited number of sub-areas for verification with a corresponding sub-area or corresponding sub-areas related to the document in the relevant data base or data bases, whereafter non-selective sub-areas are sorted-out and, in the case of a new registration of the identity document or valuable document, the document is newly registered in at least one data base. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A control device for scanning identity documents and valuable documents that include an image of the identity document owner or a pattern significant to a valuable document, comprising:
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at least one data base which contains information concerning the documents; at least one screen for reproducing the image and for reproducing data associated with information in said at least one data base; at least one document insertion device which includes a document positioning device, a processor or processors for controlling and monitoring units present in the control device, communication bus lines, control logic including an analog-to-digital converter and sampler, function selection infeed component;
an external data and telecommunications device, and a power supply, the control device includes an optical device having a light source, for scanning the whole image or a piece of said image, said scan including information for reference to an original document in a selected data base, and simultaneously record at each pixel the intensity of the light reflected from the raster points of the image together with the intensity of the light reflected by the raster points of at least one reference on the document,the device control logic functions to divide the recorded image in the sub-areas, said sub-areas including at least two pixels, the control logic of said control device effects the selection of at least one sub-area or a limited number of sub-areas prior to an authenticity check, the scan is digitized and each of the pixels is given a bit sequence corresponding to the intensity of the light reflected for said pixel, the control logic effects coordinate transformation of the image such that said image will always have the same position in relation to said reference, this reference position being the same for a corresponding document in the data base, and the control logic effects communication with at least one data base for an authenticity check or for newly registering a non-registered document in at least one data base. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification