Abstract:
Security documents which has multiple field each of which contains information that is perceptible in more than one way. One field can contain a visually perceptible image (23, 24, 25) and a ditigal watermark (22) that can be detected when the image is scanned (302) and processed, another field can contain machine readable OCR text (24) that can be read by both a human and by a programmed computer, and still another field can contain watermark data (22). Documents are produced by beginning with a template (21) which defines the placement of elements on the document and the interrelationships between hidden and visual information on the document. Pictures, graphics and digital data are extracted from a data bank, and watermark data is embedded (27) in the pictures and graphics as appropriate. An automatic validation system (312) of the present invention reads multiple fields on the document, and it also automatically detects information about the user.
Abstract:
Security documents which has multiple field each of which contains information that is perceptible in more than one way. One field can contain a visually perceptible image (23, 24, 25) and a ditigal watermark (22) that can be detected when the image is scanned (302) and processed, another field can contain machine readable OCR text (24) that can be read by both a human and by a programmed computer, and still another field can contain watermark data (22). Documents are produced by beginning with a template (21) which defines the placement of elements on the document and the interrelationships between hidden and visual information on the document. Pictures, graphics and digital data are extracted from a data bank, and watermark data is embedded (27) in the pictures and graphics as appropriate. An automatic validation system (312) of the present invention reads multiple fields on the document, and it also automatically detects information about the user.
Abstract:
Security documents (e.g. passports, currency, event tickets, and the like) are encoded to convey machine-readable multi-bit binary information (e.g. digital watermark), usually in a manner not alerting human viewers that such information is present. The documents can be provided with overt or subliminal calibration patterns. When a document incorporating such a pattern is scanned (e.g. by a photocopier), the pattern facilitates detection of the encoded information notwithstanding possible scaling or rotation of the scan data. The calibration pattern can serve as a carrier for the watermark information, or the watermark can be encoded independently. In one embodiment, the watermark and the calibration pattern are formed on the document by an intaglio process, with or without ink. A photocopier responsive to such markings can take predetermined action if reproduction of a security document is attempted. A passport processing station responsive to such markings can use the decoded binary data to access a database having information concerning the passport holder. Some such apparatuses detect both the watermark data and the presence of a visible structure characteristic of a security document (e.g., a printed seal of the document's issuer).
Abstract:
Security documents (e.g. passports, currency, event tickets) are encoded to convey machine-readable multi-bit binary information (e.g. digital watermark), usually in a manner not alerting human viewers that such information is present. The documents can be provided with overt or subliminal calibration patterns. When a document incorporating such a pattern is scanned, the pattern facilitates detection of the encoded information notwithstanding possible scaling or rotation of the scan data.
Abstract:
A method of incorporating a second image into a primary image. A vectorial grid is created that is adapted for mapping on to the primary image. A deformation is applied to the grid using data from the second image. The deformed grid is then mapped onto the primary image to create an output image. The second image is revealable by applying a decoder to the output image.