Abstract: The present disclosure is directed towards systems, methods and devices for tamper proofing documents by embedding data in a biometric identifier. The biometric identifier may be a real or synthetic fingerprint. In one non-limiting exemplary embodiment, a method for embedding data in a biometric identifier includes determining data to embed in the biometric identifier, determining at least one control parameter, and generating at least one biometric identifier feature. The method further includes including the at least one generated biometric identifier feature in the biometric identifier such that the determined data is embedded in the biometric feature. The determined data is based on a variable data stream. The control parameter controls the generation of at least one biometric identifier feature. The control parameter is based on the determined data. The generated biometric identifier feature is based on the determined control parameter.

Abstract: The present disclosure is directed towards systems, methods and devices for tamper proofing documents by embedding data in a biometric identifier. The biometric identifier may be a real or synthetic fingerprint. In one non-limiting exemplary embodiment, a method for embedding data in a biometric identifier includes determining data to embed in the biometric identifier, determining at least one control parameter, and generating at least one biometric identifier feature. The method further includes including the at least one generated biometric identifier feature in the biometric identifier such that the determined data is embedded in the biometric feature. The determined data is based on a variable data stream. The control parameter controls the generation of at least one biometric identifier feature. The control parameter is based on the determined data. The generated biometric identifier feature is based on the determined control parameter.

Abstract: A computer-implemented method for directionally characterizing an image element within an image is disclosed. The method includes obtaining an image segment and determining a directional representation value that corresponds thereto. The directional representation value is then utilized to directionally identify an image element other than the image segment.

Abstract: A computer-implemented method is provided for generating a quality field representation of a collection of image data. The method includes receiving the collection of image data and identifying a target point along a ridge in the collection of image data. A directional field representation is estimated by assigning an angle value to the ridge indicative of an angle with respect to a reference line. Also, a covariance between the target point and a corresponding point along a line orthogonal to the angle value is calculated.

Abstract: A computer-implemented method for directionally characterizing an image element within an image is disclosed. The method includes obtaining an image segment and determining a directional representation value that corresponds thereto. The directional representation value is then utilized to directionally identify an image element other than the image segment.

Abstract: A computer-implemented method is provided for generating a quality field representation of a collection of image data. The method includes receiving the collection of image data and identifying a target point along a ridge in the collection of image data. A directional field representation is estimated by assigning an angle value to the ridge indicative of an angle with respect to a reference line. Also, a covariance between the target point and a corresponding point along a line orthogonal to the angle value is calculated.

Abstract: The chamber comprises a tubular body terminating in front in a part shaped as a truncated rectangular cone. Two elastomeric rings are for adjusting around the snout of an animal, such as a rat or guinea pig. A piston bounds the space occupied by the animal's body. A collar disposed between the two rings comprises two annular segments each secured to a rod extending radially towards the exterior and secured to an actuating means and associated with a cam. A spring constantly urges the segments towards the interior. The collar is for adjusting behind the animal's head to prevent it from moving back.