Patent ID: 9723563
Date: 2017-08-01
CPC Classifications: G06F,G06K,H04L,H04M,H04W,Y02D

Claim:
1. A method of waking up a device, comprising: capturing an image by scanning a fingerprint pattern in a sleep mode; analyzing the captured image representing the scanned fingerprint pattern to obtain an amount of pixels in the captured image with respect to each brightness value; transforming the analyzed captured image into brightness distribution, wherein the brightness distribution comprises an image histogram of the fingerprint pattern; operating the brightness distribution to obtain a feature value; comparing the feature value with a pre-stored value, the device being woken up when the feature value is matched with the pre-stored value; and determining a first thresholding value for the image histogram of the fingerprint pattern, wherein a low boundary value for an image histogram of a null pattern is set as the first thresholding value for the image histogram of the fingerprint pattern, an image associated with the image histogram of said null pattern being captured while no fingerprint is present.