摘要:
Methods and devices of studying a predefined portion of an object having a feature of interest are disclosed. The feature of interest defines a class of objects that includes the object. Light sources directly illuminate the object from different illumination directions. The light sources are maintained in a stable configuration relative to the object. For each illumination direction, an image is generated from light scattered from the object with a camera maintained in a stable configuration relative to the light sources. A methodology derived from machine learning for the class of objects is applied to filter the generated images are filtered for a characteristic consistent with the feature of interest. Surface gradients are determined from the filtered images and integrated to generate a topography of a surface of the object.
摘要:
Systems and methods are described for providing reliable biometric access control using an optical biometric sensor in a miniaturized form factor. Some implementations include multiple light sources that can illuminate skin or other tissue at multiple locations during a single measurement session. An imaging array can be arranged to form images of the light exiting the tissue only after undergoing diffuse reflectance in the tissue. Some implementations use the images to perform biometric functions. For example, the images can be used to identify an individual, verify identity of an individual, estimate demographic characteristics of an individual, etc. Such biometric functions can further be used to determine and affect access to secured assets.
摘要:
One embodiment of a credential manufacturing device (100) comprises a first hopper (110), a first processing path (124), a first processing device (112), a substrate shuttle (120) and a shuttle drive (130). The first hopper (110) is configured to contain a plurality of card substrates (122) and includes an output port through which individual card substrates are discharged. The first processing device (112) is in the first processing path (124) and is configured to perform a first process on individual card substrates in the first processing path. The substrate shuttle (120) is positioned between the first hopper (110) and the first processing path (124) and is configured to move relative to the first hopper and the first processing path along a horizontal shuttle path (126) that is transverse to the first processing path. The shuttle (120) is configured to receive individual card substrates from the output port of the first hopper (110), transport received card substrates along the shuttle path (126), and deliver received card substrates to the first processing path (124). The shuttle drive (130) is configured to drive movement of the substrate shuttle (120) along the shuttle path (124).
摘要:
One embodiment of a credential manufacturing device (100) comprises a first hopper (110), a first processing path (124), a first processing device (112), a substrate shuttle (120) and a shuttle drive (130). The first hopper (110) is configured to contain a plurality of card substrates (122) and includes an output port through which individual card substrates are discharged. The first processing device (112) is in the first processing path (124) and is configured to perform a first process on individual card substrates in the first processing path. The substrate shuttle (120) is positioned between the first hopper (110) and the first processing path (124) and is configured to move relative to the first hopper and the first processing path along a horizontal shuttle path (126) that is transverse to the first processing path. The shuttle (120) is configured to receive individual card substrates from the output port of the first hopper (110), transport received card substrates along the shuttle path (126), and deliver received card substrates to the first processing path (124). The shuttle drive (130) is configured to drive movement of the substrate shuttle (120) along the shuttle path (124).
摘要:
Embodiments relate to bioimpedence-based spoof detection in an optical biometric reader. For example, embodiments operate in context of a biometric reader having a platen integrated with substantially transparent bioimpedance source and receiver electrodes covered by a substantially transparent protective layer. A multi-frequency input signal can be injected from the source electrode into a purported skin site (through the protective layer), so that a response signal is received by the receiver electrode. The response signal is interrogated to formulate a dispersive bioimpedance response of the purported skin site to the input signal over multiple frequencies. A biometric spoof determination can then be made according to the dispersive bioimpedance response. The spoof determination can be used for spoof detection, presence detection, and/or other functions.