Drawing apparatus operable to display a motion path of an operation article
First Claim
Patent Images
1. A drawing apparatus comprising;
- a stroboscope operable to direct light onto an operation article at a predetermined interval;
an image capturing device operable to capture an image of said operation article with and without light emitted from said stroboscope, and generate a lighted image signal and a non-lighted image signal which represent image signals corresponding to said operation article with and without light emitted from said stroboscope;
a differential signal generating unit operable to generate a differential signal between said lighted image signal and said non-lighted image signal;
a state information calculating unit operable to calculate state information of said operation article on the basis of said differential signal;
a following object control unit operable to control display of a following object in accordance with said state information of said operation article so that said following object follows motion of said operation article; and
a drawing control unit operable to control drawing on a display device on the basis of a motion path of said following object.
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Abstract
The drawing apparatus images the operation article by intermittently emitting light to the operation article to derive a location of the operation article on the screen. The cursor is displayed at the location of the operation article on the screen. Therefore, the cursor follows movement of the operation article. Then, the star images are displayed on the motion path of the cursor. In this way, a motion path of the operation article can be displayed by operating the operation article in the air.
28 Citations
12 Claims
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1. A drawing apparatus comprising;
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a stroboscope operable to direct light onto an operation article at a predetermined interval;
an image capturing device operable to capture an image of said operation article with and without light emitted from said stroboscope, and generate a lighted image signal and a non-lighted image signal which represent image signals corresponding to said operation article with and without light emitted from said stroboscope;
a differential signal generating unit operable to generate a differential signal between said lighted image signal and said non-lighted image signal;
a state information calculating unit operable to calculate state information of said operation article on the basis of said differential signal;
a following object control unit operable to control display of a following object in accordance with said state information of said operation article so that said following object follows motion of said operation article; and
a drawing control unit operable to control drawing on a display device on the basis of a motion path of said following object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A drawing system comprising;
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an operation article operated by a user;
a stroboscope operable to direct light onto said operation article at a predetermined interval;
an image capturing unit operable to capture an image of said operation article with and without light emitted from said stroboscope, and generate a lighted image signal and a non-lighted image signal which represent image signals corresponding to said operation article with and without light emitted from said stroboscope;
a differential signal generating unit operable to generate a differential signal between said lighted image signal and said non-lighted image signal;
a state information calculating unit operable to calculate state information of said operation article on the basis of said differential signal;
a following object control unit operable to control display of a following object in accordance with said state information of said operation article so that said following object follows motion of said operation article; and
a drawing control unit operable to control drawing on a display device on the basis of a motion path of said following object.
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11. A drawing program which enables a computer to perform a process, said process comprising:
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a step of directing light onto an operation article at a predetermined interval;
a step of capturing an image of said operation article with and without light emitted from a stroboscope and generating a lighted and a non-lighted image signal which represent image signals corresponding to said operation article with and without light emitted from said stroboscope;
a step of generating a differential signal between said lighted image signal and said non-lighted image signal;
a step of calculating state information of said operation article based on said differential signal;
a step of controlling display of a following object which moves as said operation article moves in accordance with said state information of said operation article; and
a step of controlling drawing on a display device on the basis of a motion path of said following object.
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12. A drawing method comprising;
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a step of directing light onto an operation article at a predetermined interval;
a step of capturing an image of said operation article with and without light emitted from a stroboscope and generating a lighted and a non-lighted image signal which represent image signals corresponding to said operation article with and without light emitted from said stroboscope;
a step of generating a differential signal between said lighted image signal and said non-lighted image signal;
a step of calculating state information of said operation article based on said differential signal;
a step of controlling display of a following object which moves as said operation article moves in accordance with said state information of said operation article; and
a step of controlling drawing on a display device on the basis of a motion path of said following object.
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Specification