Apple Inc.

Christopher G Zeleznik

Anup K Sharma

Michael Ross Malone

Steven Porter Hotelling

Jerrold Von Hauck

Moshe Laifenfeld

Lynn Richard Youngs

Ivan Krstic

Jonathan Pokrass

Thorsten Gernoth

Feng Tang

Thomas P Mensch

Lucia Elena Ballard

Matthew C Waldon

Tal Kaitz

Petr Kostka

Andrei Kolin

Deepti S Prakash

Ziv Hendel

Gideon Littwin

Lucie Kucerova

Eitan Hirsh

Etai Littwin

Pavan Kumar Anasosalu Vasu

Chiajen Lee

Kelsey Yukio Ho

Harish Venkataraman

Susan Ann Thompson

Pavan Kumar Ansosalu Vasu

Techniques are disclosed relating to biometric authentication, e.g., facial recognition. In some embodiments, a device is configured to verify that image data from a camera unit exhibits a pseudo-random sequence of image capture modes and/or a probing pattern of illumination points (e.g., from lasers in a depth capture mode) before authenticating a user based on recognizing a face in the image data. In some embodiments, a secure circuit may control verification of the sequence and/or the probing pattern. In some embodiments, the secure circuit may verify frame numbers, signatures, and/or nonce values for captured image information. In some embodiments, a device may implement one or more lockout procedures in response to biometric authentication failures. The disclosed techniques may reduce or eliminate the effectiveness of spoofing and/or replay attacks, in some embodiments.

Biometric authentication techniques

An optoelectronic system includes a transmit side and a receive side. The transmit side and the receive side each include an oversampled phase locked loop configured to receive a decimated system clock signal. Each phase-locked loop is configured to output a high frequency sampling clock signal that, in the case of the transmit side, may be leveraged to generate an arbitrary current waveform that, in turn, can be delayed by a delay-locked loop before being applied to a current-controlled light emitting element. The receive side can generate a clock signal at the same high frequency as the transmit side and can be configured to trigger a reset of the transmit side so that the high frequency clock signals between the transmit and receive sides are synchronized.

Tx-Rx synchronization for reflective optoelectronic systems in portable electronic devices

An image sensor includes an imaging area and one or more flicker detection regions. The imaging area includes pixels that capture one or more images. Each flicker detection region includes pixels that are sampled multiple times while an image is being captured. The samples can be analyzed to detect flicker in the scene being imaged.

Image sensor flicker detection

Growing community of inventors

San Jose, CA, United States of America

Christopher G Zeleznik