Abstract:
La presente invencion proporciona un sistema optico operable para eliminar la distorsion por paralaje en una imagen capturada. Específicamente, el aparato elimina la distorsion por paralaje en una imagen de la huella de la palma. El aparato incluye un prisma que tiene una superficie de recepcion y una superficie de recepcion y una luz ilumina la superficie de recepcion de modo que una imagen representativa de la palma es propagada desde la superficie del objeto. La imagen propagada incluye una pluralidad de segmentos. Un lente amplifica selectivamente cada uno de los segmentos en una cantidad diferente, para crear una pluralidad de segmentos amplificados de igual longitud. Un medio de registro de la imagen captura entonces los segmentos amplificados. La invencion también proporciona un dispositivo cilíndrico operable para capturar la imagen de la palma, en donde la palma puede ser girada a través de un cilindro transparente y la luz reflejada es capturada por un medio de registro representativo de la impresion o huella de la palma.
Abstract:
Un equipo para tomas de huellas dactilares autocontenido, incluye primeros, segundos y terceros (o más) paneles (19, 20, 21), cada uno que tiene una cara superior y una cara de fondo(11, 12), con adhesivo para union de paneles sobre los bordes exteriores de al menos algunas de las caras de los paneles para mantenerlas unidas, de manera tal que la cara superior del segundo panel acopla la cara de fondo del primer panel, y la cara de fondo del segundo panel acopla la cara superior del tercer panel. Un primer producto químico seco para toma de huellas dactilares (23) se dispone en un área que se proporciona en uno de la cara de fondo del primer panel o la cara superior del segundo panel, y un área para aplicacion de huella dactilar (24) (que puede comprender un segundo producto químico seco para toma de huella dactilares, que coopera con el primer producto químico para proporcionar una huella dactilar revelada) que se proporciona en la cara de fondo del segundo panel, o la cara superior del tercer panel, para recepcion de huellas dactilares con producto químico para toma de huellas dactilares desde un primer producto químico seco para toma de huellas dactilares. Un área con adhesivo receptora de fotografía (25, 27) de preferencia se proporciona en el segundo panel con un forro desprendible que cubre el área de adhesivo, el área de adhesivo es suficientemente grande para montar una fotografía. Los paneles pueden formarse al doblar una hoja substancialmente cuadrada de papel (papel bond de 21.59 x 27.94 cm (8.5 x 1")) y sellar el adhesivo que une los paneles entre sí con presion, a fin de afectar adversamente el producto químico para toma de huellas dactilares. El equipo integral puede colocarse en una caja de cereales u otro empaque para uso de consumidores.
Abstract:
La invencion propone un sistema de lectura de huellas dactilares que comprende un captador (10, 50) de huellas que tiene una superficie activa, sensible a la presion y a la temperatura de un dedo (11, 53), y en el que la superficie es bastante más pequeña que la superficie de la huella dactilar (52) a leer, efectuándose la lectura cuando el captador y el dedo están en contacto y con un movimiento relativo de deslizamiento del captador y del dedo, uno con respecto al otro. El sistema lleva medios para reconstruir una imagen completa de la huella a partir de las imágenes (10, 11..., in) parciales, suministradas por el captador durante dicho movimiento. De aplicacion particularmente en los dispositivos de identificacion de personas.
Abstract:
The invention concerns a device for the identification of fingerprints by means of ultrasonics, the device consisting of an electronic analysis circuit, a hollow liquid-filled cylinder (1) of length L with a lid (2) and a baseplate (3), the speed of the ultrasonic waves through the liquid being c' and the lid (2) being made of a material through which the speed of the ultrasonic waves is c". The outside of the lid (2) is flat for use as the contact surface for the fingerprint. The inside is either convex (c'
Abstract:
A process for the unambiguous pairing of documents to a given patient provides for: a) the request for a particular diagnostic investigation, to said patient, and b) the assignment and permanent association of an identification code to the patient through a support device (3), affixed to the patient himself. The process also provides for the transfer of the patient to a machine (6) for performing the prescribed examination, where a reader (4) checks the identification code on the support device (3). The patient identification code together with identification data corresponding to the prescribed examination are stored by appropriate devices (5, 31, 33, 34) on a temporary support (27). Lastly, the machine (6) executes the prescribed examination, generating a document (7) to which the code and data written on the temporary support (27) has been transferred, as well as the document (7) containing the result of the examination.
Abstract:
At least one wide field of view camera (3) and with an associated illuminator (6, 10) obtains sufficient images of a person to be identified so that x, y, z coordinates can be established for the expected position of that person's eye. The coordinates are used to direct a narrow field of view camera (16) and associated illuminators (21-23) to take an image of the eye (76, 78) that can be used for to identifying the person using iris verification and recognition algorithms. These illuminators are positioned and illuminated to eliminate or minimize specularities and reflections that obscure the iris (76).
Abstract:
Method and apparatus for measuring of patterns in an at least partially heat conducting surface (10), preferably a fingerprint, characterized in the heating of a plurality of sensor elements (15) being in thermal contact with a substantial part of the surface to be examined, the measuring of temperature or change in temperature in each of the sensor elements to provide a signal corresponding to the heat loss in relation to the supplied energy in each sensor element, and collocating said signal at each sensor element to provide a segmented picture based upon the difference in heat loss at the sensor elements.
Abstract:
A process and device are disclosed for verifying the authenticity and/or identifying the spatial structure of an object to be inspected. A layer or surface (6) which is transparent to ultrasonic waves but which reflects or diffracts electromagnetic waves is arranged in the body (4). This layer or surface (6) in the body (5) is locally and time-dependently deformed by the ultrasonic waves according to the form and intensity of the reflected or diffracted ultrasonic waves, and this layer (6) is irradiated at an angle with electromagnetic waves. In the area of the reflected and/or diffracted electromagnetic radiation located under the reflection angle (9) said radiation is sensed and its modification caused by its reflection or diffraction on the layer (6) is evaluated. In order to implement this process, a device is designed so that said layer (6) is arranged in the body (4) and that the device (1) has a source (7) of electromagnetic radiation whose rays are directed towards the layer (6), and at least one radiation receiver (8) is pprovided in the area of the reflected or diffracted electromagnetic radiation in order to evaluate this radiation.
Abstract:
Skin pattern sensing apparatus for detecting the skin pattern of part of the human body such as a finger comprises a transparent support in the form of a prism on a first face (3) of which is provided an elastomeric layer (4). A set of LEDs (6-9) are provided for generating radiation which impinges on and passes through a second face (10) of the support before impinging on the first face (3). A detector (20) is provided for detecting radiation which has been scattered due to the effect of the skin pattern impressed on the elastomeric layer (4) and which is passed back through the second face (10). A mask (13) prevents radiation reflected by the second face (10) of the prism reaching the detector (20).
Abstract:
The present invention relates to a device for scanning the surface of a generally cylindrical object carrying a raised pattern thereon so as to detect that pattern, notably for scanning a finger, which device comprises: a) a transparent optical body (2) having a substantially arcuate configuration about a first axis and having a convergent radial cross-section, and a channel (5) parallel to and substantially co-axial with that axis, which channel (5) presents a face substantially parallel to the said axis, upon which the object whose surface is to be observed can be placed, and the underside of which face serves as the optical base face to the convergent radial cross-section to the body (2); b) a source of incident light (100) adapted to be directed onto a light entry face (105) of the convergent cross-section of the body (2), the configuratin of the body (2) being such that the incident light is adapted to strike the underside of the said base face at substantially the angle of total internal reflection for the material from which the body (2) is fabricated and to be reflected through a light exit face of the convergent cross-section of the body (2); c) means for causing the incident light from said source (100) to illuminate the surface of an object placed in contact with the planar face of the channel (5); and d) a means for observing the light reflected from the underside of the base face through a light exit face of the convergent cross-section of the body (2) and for providing a signal dependent upon the intensity of the light detected. The invention also provides a method for scanning an article to detect a raised pattern thereon and a novel optical body for use in the method or device of the invention.