Sensing System and Method for Obtaining Location of Pointer thereof
First Claim
Patent Images
1. A sensing system, comprising:
- a sensing area;
a reflective mirror configured for generating a mirror image of the sensing area;
a first image sensor;
a second image sensor, the second image sensor and the first image sensor being both configured for sensing images of the sensing area, and at least one of the first image sensor and the second image sensor having a sensing range covering all of the sensing area; and
a processor, wherein when a pointer approaches the sensing area, the processor calculates a first coordinate value of the pointer according to the pointer and a mirror image of the pointer which are sensed by the first image sensor and endues the first coordinate value with a first weighting factor, and the processor also calculates a second coordinate value of the pointer according to the pointer and the mirror image of the pointer which are sensed by the second image sensor and endues the second coordinate value with a second weighting factor, such that the processor could calculate the location of the pointer according to the first coordinate value, the first weighting factor, the second coordinate value and the second weighting factor.
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Abstract
In a sensing system and a method for obtaining a location of a pointer, the sensing system includes a sensing area, a reflective mirror, a first image sensor and a second image sensor. The reflective mirror is configured for generating a mirror image of the sensing area. The sensing system utilizes the above two image sensors to sense the pointer disposed in the sensing area and a mirror image of the pointer for obtaining two coordinate values. And then the sensing system endues each of the two coordinate values with a weighting factor for calculating the location of the pointer.
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Citations
34 Claims
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1. A sensing system, comprising:
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a sensing area; a reflective mirror configured for generating a mirror image of the sensing area; a first image sensor; a second image sensor, the second image sensor and the first image sensor being both configured for sensing images of the sensing area, and at least one of the first image sensor and the second image sensor having a sensing range covering all of the sensing area; and a processor, wherein when a pointer approaches the sensing area, the processor calculates a first coordinate value of the pointer according to the pointer and a mirror image of the pointer which are sensed by the first image sensor and endues the first coordinate value with a first weighting factor, and the processor also calculates a second coordinate value of the pointer according to the pointer and the mirror image of the pointer which are sensed by the second image sensor and endues the second coordinate value with a second weighting factor, such that the processor could calculate the location of the pointer according to the first coordinate value, the first weighting factor, the second coordinate value and the second weighting factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23)
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12. A sensing system, comprising:
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a sensing area; a reflective mirror configured for generating a mirror image of the sensing area; a first image sensor; a second image sensor, the second image sensor and the first image sensor being both configured for sensing images of the sensing area, and at least one of the first image sensor and the second image sensor having a sensing range covering all of the sensing area; a first processor, wherein when a pointer approaches the sensing area, the first processor calculates a first coordinate value of the pointer according to the pointer and a mirror image of the pointer which are sensed by the first image sensor and endues the first coordinate value with a first weighting factor; and a second processor configured for receiving the first coordinate value and the first weighting factor, and determining whether to employ the second image sensor to sense the pointer and the mirror image of the pointer according to the first weighting factor for calculating the location of the pointer. - View Dependent Claims (14, 16, 18, 20, 21, 22, 24, 25, 27, 30)
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26. A method for obtaining a location of a pointer, the method being adapted for a sensing system, the sensing system comprising a sensing area, a reflective mirror, a first image sensor and a second image sensor, the reflective mirror being configured for generating a mirror image of the sensing area, the first image sensor and the second image sensor being both configured for sensing images of the sensing area, and at least one of the first image sensor and the second image sensor having a sensing range covering all of the sensing area, the method comprising:
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calculating a first coordinate value of the pointer according to the pointer and a mirror image of the pointer which are sensed by the first image sensor and enduing the first coordinate value with a first weighting factor; calculating a second coordinate value of the pointer according to the pointer and the mirror image of the pointer which are sensed by the second image sensor and enduing the second coordinate value with a second weighting factor; and calculating the location of the pointer according to the first coordinate value, the first weighting factor, the second coordinate value and the second weighting factor. - View Dependent Claims (29, 31, 32, 33, 34)
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28. A method for obtaining a location of a pointer, the method being adapted for a sensing system, the sensing system comprising a sensing area, a reflective mirror, a first image sensor and a second image sensor, the reflective mirror being configured for generating a mirror image of the sensing area, the first image sensor and the second image sensor being both configured for sensing images of the sensing area, and at least one of the first image sensor and the second image sensor having a sensing range covering all of the sensing area, the method comprising:
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calculating a first coordinate value of the pointer according to the pointer and a mirror image of the pointer which are sensed by the first image sensor and enduing the first coordinate value with a first weighting factor; and determining whether to employ the second image sensor to sense the pointer and the mirror image of the pointer according to the first weighting factor for calculating the location of the pointer.
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Specification