Abrégé

An image conversion method is provided for integrating a security feature in a digital source image to generate a target image secured by the integrated security feature. The image conversion method includes carrying out transverse-wave-shaped distortion of the source image to generate an intermediate image; generating a target image, the intermediate image being scanned by rows of pixels to define, per row of pixels of the intermediate image, a sequence of successive pixels according to the scanning, and each pixel of the sequence being transformed to a corresponding pixel of the target image. The arrangement of the respective pixels of each sequence is a transverse-wave-shaped wave packet in the target image; and the integrated security feature is defined by the wave packets.

Classes IPC  ?

• B41M 5/26 - Thermographie
• B42D 25/23 - Cartes d’identité
• B42D 25/24 - Passeports
• B42D 25/309 - Photographies
• G02B 26/10 - Systèmes de balayage
• G06T 5/50 - Amélioration ou restauration d'image utilisant plusieurs images, p. ex. moyenne ou soustraction
• G06T 5/80 - Correction géométrique

Abrégé

A method for identifying a person from an identity document comprises the steps of: capturing biometric features of a person; capturing machine-readable information of an identity document; determining a hash value on the basis of the captured information; determining an encryption key on the basis of the captured information; determining whether encrypted data associated with the hash value are stored in a database; and if the encrypted data associated with the hash value are determined as being stored in the database: decrypting the encrypted data using the determined encryption key; identifying the person on the basis of the captured biometric features and the decrypted data.

Classes IPC  ?

• G06F 21/32 - Authentification de l’utilisateur par données biométriques, p. ex. empreintes digitales, balayages de l’iris ou empreintes vocales
• H04L 9/32 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité comprenant des moyens pour vérifier l'identité ou l'autorisation d'un utilisateur du système

Abrégé

The invention relates to an image conversion method for integrating a security feature in a digital source image to generate a target image secured by the integrated security feature. The image conversion method comprises: carrying out transverse-wave-shaped distortion of the source image to generate an intermediate image; generating a target image, the intermediate image being scanned by rows of pixels in order to define, per row of pixels of the intermediate image, a sequence of successive pixels according to the scanning, and each pixel of the sequence being transformed to a corresponding pixel of the target image in that its position in the target image is defined starting from its position in the intermediate image by compensation of the distortion used in the generation of the intermediate image, so that the arrangement of the respective pixels of each sequence is a transverse-wave-shaped wave packet in the target image; wherein the integrated security feature is defined by the wave packets.

Classes IPC  ?

• H04N 1/32 - Circuits ou dispositions pour la commande ou le contrôle entre l'émetteur et le récepteur
• G07D 7/005 - Vérification par des marquages de sécurité invisibles à l’œil nu, p. ex. vérification de lignes épaissies, de marquages ou d'altérations discrets

Abrégé

The invention relates to an image conversion method for integrating a security feature in a digital source image to generate a target image secured by the integrated security feature. The image conversion method comprises: carrying out transverse-wave-shaped distortion of the source image to generate an intermediate image; generating a target image, the intermediate image being scanned by rows of pixels in order to define, per row of pixels of the intermediate image, a sequence of successive pixels according to the scanning, and each pixel of the sequence being transformed to a corresponding pixel of the target image in that its position in the target image is defined starting from its position in the intermediate image by compensation of the distortion used in the generation of the intermediate image, so that the arrangement of the respective pixels of each sequence is a transverse-wave-shaped wave packet in the target image; wherein the integrated security feature is defined by the wave packets.

Classes IPC  ?

• G07D 7/005 - Vérification par des marquages de sécurité invisibles à l’œil nu, p. ex. vérification de lignes épaissies, de marquages ou d'altérations discrets
• H04N 1/32 - Circuits ou dispositions pour la commande ou le contrôle entre l'émetteur et le récepteur

Abrégé

A verification method for verifying a digital image having an integrated security feature, the method comprising the steps of: transforming the digital image from a space domain defined by the spatial arrangement of its image points into a frequency domain using a mathematical transform which has the property of mapping distances between adjacent lines in the space domain to the frequency domain such that different distances in the space domain correspond to different frequencies in the frequency domain; comparing the spectrum resulting from the transform to at least one reference spectrum representing a spectrum, which is or can be generated by means of the transform, of a digital original image to be categorised as genuine; and classifying the digital image to be verified as genuine or not genuine depending on the result of the comparison.

Classes IPC  ?

• G07D 7/12 - Lumière visible, rayonnement infrarouge ou ultraviolet
• G07D 7/202 - Vérification de motifs des papiers en utilisant la mise en correspondance de motifs
• G07D 7/20 - Vérification de motifs des papiers