Coordinate input device working with at least display screen and desk-top surface as the pointing areas thereof
First Claim
1. A coordinate input device comprising:
- a pair of cameras positioned in an upper left position and an upper right position of a display screen of a monitor lying close to a plane extending from the display screen of the monitor and views both a side face of an object in contact with a position on the display screen and a predetermined desk-top coordinate detection area to capture the image of the object within a field of view; and
a control circuit which calculates the coordinate value of a pointing tool, pointing to a position within a coordinate detection field, based on video signals output from the pair of cameras, and transfers the coordinate value to a program of a computer.
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Accused Products
Abstract
A coordinate input device includes a pair of cameras positioned in an upper left position and an upper right position of a display screen of a monitor lying close to a plane extending from the display screen of the monitor and views both a side face of an object in contact with a position on the display screen and a predetermined desk-top coordinate detection area to capture the image of the object within the field of view. The coordinate input device also includes a control circuit which calculates the coordinate value of a pointing tool, pointing to a position within a coordinate detection field, based on video signals output from the pair of cameras, and transfers the coordinate value to a program of a computer.
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Citations
20 Claims
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1. A coordinate input device comprising:
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a pair of cameras positioned in an upper left position and an upper right position of a display screen of a monitor lying close to a plane extending from the display screen of the monitor and views both a side face of an object in contact with a position on the display screen and a predetermined desk-top coordinate detection area to capture the image of the object within a field of view; and
a control circuit which calculates the coordinate value of a pointing tool, pointing to a position within a coordinate detection field, based on video signals output from the pair of cameras, and transfers the coordinate value to a program of a computer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A coordinate input device comprising:
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means for capturing an image positioned in an upper left position and an upper right position of a display screen of a monitor lying close to a plane extending from the display screen of the monitor and views both a side face of an object in contact with a position on the display screen and a predetermined desk-top coordinate detection area to capture the image of the object within a field of view, and means for calculating the coordinate value of a pointing tool pointing to a position within a coordinate detection field, based on video signals output from the means for capturing an image, and transferring the coordinate value to a program of a computer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method for inputting image information comprising:
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capturing image data;
determining a pixel that provides a signal at the highest signal level from the captured image data; and
calculating touch coordinates using a pixel-coordinate table from a position of the pixel that provides a signal at the highest level. - View Dependent Claims (20)
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Specification