Patent ID: 9652086
Date: 2017-05-16
CPC Classifications: G06F

Claim:
1. A touch point recognition method of a touch screen, the method comprising: touching one surface of a touch screen with a hand and sensing a palm area of the hand by taking an optical image of the hand with a camera disposed at a side opposite to the hand with respect to the touch screen; extracting finger touch areas from the palm area sensed with the camera by using a bandpass filter; extracting finger areas from the palm area sensed with the camera by using an image processing filter; extracting a palm center area from the palm area sensed with the camera by using a lowpass filter; grouping the finger touch areas according to where the finger touch areas are disposed among the finger areas; and recognizing a finger touch area, which is distant from the palm center area, in grouped finger touch areas as an actual touch area.