Pointed-position detecting apparatus and method
First Claim
1. A pointed-position detecting apparatus comprising:
- input means for inputting a visible image;
detection means for detecting a changed image area, where the visible image has changed, in the visible imago inputted by said input means;
obtaining means for obtaining a plurality of corner points of the changed image area; and
selecting means for selecting a corner point from the plurality of corner points, which is not in contact with an edge of the visible image, as a designation position in the visible image.
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Abstract
A pointed-position detecting apparatus where image output unit visually displays an image, and image input unit inputs the displayed visible image. The input visible image is stored into memory as an original image. The visible image is partially changed by using a manipulation device such as a laser pointer or a pointing rod, and the visible image with the partially-changed area is inputted from the image input unit. Controller extract the changed image area from the input visible image, and detects a pointed position based on the changed image area. Thus, the phenomenon where a user'"'"'s action with respect to a displayed image is reflected as a change in the image is utilized to detect coordinates and motion at the image area as the object of change.
106 Citations
20 Claims
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1. A pointed-position detecting apparatus comprising:
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input means for inputting a visible image;
detection means for detecting a changed image area, where the visible image has changed, in the visible imago inputted by said input means;
obtaining means for obtaining a plurality of corner points of the changed image area; and
selecting means for selecting a corner point from the plurality of corner points, which is not in contact with an edge of the visible image, as a designation position in the visible image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
monitoring means for monitoring a status of the designation position to determine whether or not the position of the designation position is substantially maintained for a predetermined period; and
judgement means for judging, when the maintaining of the position is determined by said monitoring means, when to execute a function corresponding to the designation position.
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9. The pointed-position detecting apparatus according to claim 1, wherein said selecting means selects a corner point of the changed image area, said corner point not being in contact with an edge of the visible image and a pixel value of said point having been changed before and after the detection of the changed image area.
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10. A pointed-position detecting method comprising:
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an input step of inputting a visible image;
a detection step of detecting a changed image area, where the visible image has changed, in the visible image inputted at said input step;
an obtaining step of obtaining a plurality of corner points of the changed image area; and
a selecting step of selecting a corner point from the plurality of corner points, which is not in contact with an edge of the visible image, as a destination position in the visible image. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
a monitoring step of monitoring a status of the designation position to determine whether or not the status of the designation position is maintained for a predetermined period; and
a judgment step of judging, when the maintaining of the status is determined in said monitoring step, to execute a function corresponding to the designation position.
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18. The pointed-position detecting method according to claim 10, wherein, in said selecting step, a corner point of the changed image area is selected, said corner point not being in contact with an edge of the visible image and a pixel value of said point having been changed before and after the detection of the changed image area.
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19. A computer program product comprising a computer usable medium having computer readable program code means embodied in said medium for detecting a pointed position, said product including:
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input process procedure codes for inputting a displayed visible image;
detection process procedure codes for detecting a changed image area, where the visible image has changed, in the visible image inputted at said input process;
obtaining process procedure codes for obtaining a plurality of corner points of the changed image area; and
selecting process procedure codes for selecting a corner point from the plurality of corner points, which is not in contact with an edge of the visible image, as a designation position in the visible image. - View Dependent Claims (20)
monitoring process procedure codes for monitoring a status of the designation position to determine whether or not the status of the designation position is maintained for a predetermined period; and
judgement process procedure code for judging, when the maintaining of the status is determined by said monitoring process, when a function corresponding to the designation position is to be executed.
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Specification