Cypress Semiconductor Corporation

Oleksandr Rohozin

Viktor Kremin

Andriy Ryshtun

Oleg Kapshii

Roman Ogirko

Oleksandr Pirogov

Mykhaylo Krekhovetskyy

Volodymyr Bihday

A method for detecting a finger at a fingerprint sensor includes detecting a presence of an object at a fingerprint sensor and, in response to detecting the presence of the object, acquiring image data for the object based on signals from the fingerprint sensor. The method further includes, for each subset of one or more subsets of the image data, calculating a magnitude value for a spatial frequency of the subset, and identifying the object as a finger based on comparing the magnitude value to a threshold.

Non-finger object rejection for fingerprint sensors

A method for detecting fingerprint spoof objects includes detecting a presence of the object at a fingerprint sensor and, in response to detecting the presence of the object, measuring a set of physical properties of the object based on one or more signals from a set of electrodes of the fingerprint sensor. The set of physical properties includes at least one of a subdermal compliance of the object and a surface adhesiveness of the object. The method further includes distinguishing the object as an actual finger or a spoof based on the one or more physical properties.

Anti-spoofing protection for fingerprint controllers

A method and apparatus receive a plurality of signal values, the plurality of signal values responsive to an input object. The method and apparatus calculate at least one signal ratio value using the plurality of signal values and determine a position of the input object using the at least one signal ratio value.

Methods and apparatus to determine position of an input object

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Lviv, Ukraine

Oleksandr Rohozin