| 摘要 |
A method for detecting roll angles of a finger in contact with a fingerprint scanning sensor is described. The method includes obtaining spatial measurement data of a measurable contact area from a touch surface of a fingerprint scanning sensor, using an algorithm to create at least two statistical quantities from this spatial measurement data, using the statistical quantities to generate at least one measurement of a finger roll angle with respect to a reference position, and providing the roll angle measurement for external uses. This method can also be used to detect pitch angles of a finger contacting a fingerprint scanning sensor. The roll and pitch angles are calculated in real time and used for controlling applications on electronic devices such as computers and mobile phones. |
