Method for detecting object on an operation interface of a touchable device and touchable device using the same

摘要

A method for detecting an object and a touchable device are presented, which is capable of detecting an object having a fingerprint feature on an operation interface of the touchable device. An image sensor is used for acquiring acquiring an image on the operation interface, and the acquired image is converted into a signal denoted in a frequency domain by using a frequency conversion function. Signals at a medium-high frequency (MHF) signal region among the signals of the frequency domain are analyzed, so as to generate a first signal and a second signal according to a distribution of the signals of the frequency domain. The first signal indicates existence of the object on the operation interface, and the second signal indicates inexistence of the object on the operation interface.

主权项

1. A method for detecting a object, applicable to a touchable device, for detecting the object having a fingerprint feature and placed on an operation interface of the touchable device, comprising:
acquiring, by an image sensor of the touchable device, an image on the operation interface; converting, by a processor of the touchable device, the acquired image in a spatial domain into a signal of a frequency domain by using a frequency conversion function; and generating a first signal and a second signal according to a distribution of the signals of the frequency domain in a medium-high frequency (MHF) signal region, wherein the first signal indicates existence of the object on the operation interface, and the second signal indicates inexistence of the object on the operation interface.