AGILE BIOMETRIC CAMERA WITH BANDPASS FILTER AND VARIABLE LIGHT SOURCE
First Claim
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1. A biometric camera system for a mobile device, comprising:
- a light source disposed on a mobile device and configured to illuminate a person at a controlled wavelength during an image capture;
a biometric camera disposed on the mobile device, the biometric camera comprising;
an imaging lens;
a bandpass filter disposed along a focal axis of the imaging lens and operable to filter ambient illumination and to transmit illumination of the controlled wavelength;
an imaging sensor disposed along the focal axis of the imaging lens such that the bandpass filter is disposed between the imaging lens and the imaging sensor, the imaging sensor configured to convert an optical image of the person into an electronic signal for generating a video image of the person; and
a processor configured to receive the video image of the person and to determine an authentication status of the person.
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Abstract
A system and method for authenticating a user of a device. A biometric camera system includes a light source having a variable illumination wavelength output, and a camera including an imaging sensor and a bandpass filter for filtering ambient illumination received at the imaging sensor. An optical image of a user, for example an image of an iris, is generated by illumination from the light source, filtered by the bandpass filter, and received at the imaging sensor. An authentication status of the user can be determined using the image.
38 Citations
20 Claims
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1. A biometric camera system for a mobile device, comprising:
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a light source disposed on a mobile device and configured to illuminate a person at a controlled wavelength during an image capture; a biometric camera disposed on the mobile device, the biometric camera comprising; an imaging lens; a bandpass filter disposed along a focal axis of the imaging lens and operable to filter ambient illumination and to transmit illumination of the controlled wavelength; an imaging sensor disposed along the focal axis of the imaging lens such that the bandpass filter is disposed between the imaging lens and the imaging sensor, the imaging sensor configured to convert an optical image of the person into an electronic signal for generating a video image of the person; and a processor configured to receive the video image of the person and to determine an authentication status of the person. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of capturing an image of a person for biometric identification, the method comprising:
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illuminating a person with a light source during an image capture, the light source adjacent to a camera system comprising a bandpass filter and an image sensor, the camera system and the light source housed in a mobile device; filtering ambient illumination during the image capture with the bandpass filter; receiving reflected illumination of the person during the image capture at the image sensor; generating an electrical signal corresponding to the reflected illumination of the person; processing the electrical signal to generate an image of the person; and determining an authentication status of the person based on the image of the person. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A mobile apparatus operable for biometric user authentication, the apparatus comprising:
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a processor; a memory storing an iris database and operatively coupled to the processor; an illumination source configured to emit illumination at a controlled wavelength, the illumination operable for illuminating an iris of a subject; and a camera, comprising; an imaging lens; a bandpass filter disposed along a focal axis of the imaging lens to reject ambient illumination outside of the controlled wavelength during image capture; and an imaging sensor disposed along the focal axis of the imaging lens such that the bandpass filter is disposed between the imaging lens and the imaging sensor; wherein the imaging sensor is configured to convert an optical image of the iris into an electronic signal for generating a video image of the iris, and the processor is configured to receive the video image of the iris and attempt to match the video image of the iris with a previously registered image stored in the iris database, wherein the subject is authenticated if a match is determined. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification