Method of authenticating documents by means of a mobile telecommunications terminal
AssigneeSafran Identity & Security
InventorsOlivier TOURET, Pierre CHASTEL
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Abstract
A method for authenticating at least one document having a predetermined format and carrying at least one security pattern of appearance that varies as a function of an angle of observation, the method comprising the steps of: capturing at least one image of the document; determining a camera angle by comparing geometric characteristics detected in the document and stored predetermined geometric characteristics; deducing an expected appearance for the security pattern; comparing the expected appearance with an appearance detected in the image of the document; and declaring the document authentic when the expected appearance matches the detected appearance.
Claims9
A method for authenticating at least one document having a predetermined format and carrying at least one security pattern of appearance that varies as a function of observation angle parameters, the method being implemented by means of a mobile telecommunications terminal having an image sensor, and by means of a processing unit connected to a memory containing predetermined geometric characteristics of the document, the method comprising the steps of capturing at least one image of the document by means of the image sensor and of transmitting it to the processing unit, and subsequent steps, performed by the processing unit, of:
- determining camera angle parameters by comparing geometric characteristics detected in the image of the document with stored predetermined geometric characteristics;
- deducing an expected appearance for the security pattern;
- comparing the expected appearance with an appearance of the security pattern as detected in the image of the document;
- and
- declaring the document authentic when the expected appearance matches the detected appearance.
The method according to claim 1, the telecommunications terminal including illumination means, wherein the image is captured while the illumination means are activated.
The method according to claim 2, comprising the step of capturing one image with the illumination means activated and one image with the illumination means deactivated.
Dependencies are inferred from the claim text.