Method of Tracking Touch Inputs
First Claim
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1. A method of tracking touch inputs, the method comprising:
- calculating a first center position corresponding to two touch points along a first axis for a first frame;
detecting variation of the first center position from the first frame to a second frame; and
determining a gesture type according to the variation of the first center position.
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Abstract
For a multitouch input configuration, tracking touch inputs includes calculating a first center position corresponding to two touch points along a first axis for a first frame, detecting variation of the first center position from the first frame to a second frame, and determining a gesture type according to the variation of the first center position.
20 Citations
13 Claims
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1. A method of tracking touch inputs, the method comprising:
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calculating a first center position corresponding to two touch points along a first axis for a first frame; detecting variation of the first center position from the first frame to a second frame; and determining a gesture type according to the variation of the first center position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of tracking touch inputs, the method comprising:
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calculating a first center position corresponding to two touch points along a first axis for a first frame; detecting variation of the first center position from the first frame to a second frame; calculating a second center position corresponding to the two touch points along a second axis for a first frame; detecting variation of the second center position from the first frame to the second frame; and determining a zoom gesture type when the variation of the first center position and the variation of the second position are both lower than a predetermined threshold. - View Dependent Claims (8, 9, 10, 11)
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12. A touch input tracking device comprising:
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a receiving module for receiving a first frame and a second frame; a center point calculation module for calculating a first center point and a second center point of two touch points in the first frame and the second frame, the first center point corresponding to a first axis and the second center point corresponding to a second axis; and a gesture determination module for determining a gesture type according to variation of the first center point from the first frame to the second frame, and variation of the second center point from the first frame to the second frame.
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13. A computer system comprising:
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a touch input tracking device comprising; a receiving module for receiving a first frame and a second frame; a center point calculation module for calculating a first center point and a second center point of two touch points in the first frame and the second frame, the first center point corresponding to a first axis and the second center point corresponding to a second axis; and a gesture determination module for determining a gesture type according to variation of the first center point from the first frame to the second frame, and variation of the second center point from the first frame to the second frame; a communication interface for receiving the gesture type from the gesture determination module; a display; and a processor for modifying an image according to the gesture type and driving the display to display the image.
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Specification