OPERATION DETECTION DEVICE, OPERATION DETECTION METHOD AND PROJECTOR
First Claim
1. An operation detection device that detects an operation performed by a finger of a user with respect to an operation surface, the operation detection device comprising:
- a first illumination and a second illumination that irradiate illumination light from different positions onto the operation surface;
a camera that captures, together with the finger of the user, the operation surface onto which the illumination light has been irradiated;
a shadow region extraction unit that, on the basis of a captured image obtained by the camera, extracts a first shadow of the finger of the user produced by the first illumination and a second shadow of the finger of the user produced by the second illumination; and
a touch point detection unit that, on the basis of the first shadow and the second shadow extracted, detects a touch point of the finger of the user on the operation surface.
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Accused Products
Abstract
An operation detection device includes: first and second illuminations that irradiate illumination light from different positions onto an operation surface on which a user performs an operation; a camera that captures the operation surface together with an operation part (finger) of the user; a shadow region extraction unit that extracts first and second shadows of the operation part of the user from a captured image obtained by the camera; a contour detection unit that detects contours of each of the first and second shadows extracted; and a touch point detection unit that detects a touch point of the operation part of the user on the operation surface from the distance between the contours.
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Citations
18 Claims
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1. An operation detection device that detects an operation performed by a finger of a user with respect to an operation surface, the operation detection device comprising:
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a first illumination and a second illumination that irradiate illumination light from different positions onto the operation surface; a camera that captures, together with the finger of the user, the operation surface onto which the illumination light has been irradiated; a shadow region extraction unit that, on the basis of a captured image obtained by the camera, extracts a first shadow of the finger of the user produced by the first illumination and a second shadow of the finger of the user produced by the second illumination; and a touch point detection unit that, on the basis of the first shadow and the second shadow extracted, detects a touch point of the finger of the user on the operation surface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An operation detection device that detects an operation performed by a finger of a user with respect to an operation surface, the operation detection device comprising:
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a plurality of illuminations that irradiate illumination light from different positions onto the operation surface; a camera that captures, together with the finger of the user, the operation surface onto which the illumination light has been irradiated; a shadow region extraction unit that, from a captured image obtained by the camera, extracts a region in which a plurality of shadows of the finger of the user overlap; and a touch point detection unit that, on the basis of the region in which the plurality of shadows overlap, detects a touch point of the finger of the user on the operation surface, wherein the shadow region extraction unit extracts a portion in which the brightness of a shadow is equal to or less than a predetermined threshold value, as the region in which the plurality of shadows overlap.
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8. An operation detection method that detects an operation performed by a finger of a user with respect to an operation surface, wherein
illumination light is irradiated from different positions onto the operation surface by a first illumination and a second illumination, together with the finger of the user, the operation surface onto which the illumination light has been irradiated is captured by a camera, a first shadow of the finger of the user produced by the first illumination and a second shadow of the finger of the user produced by the second illumination are extracted on the basis of a captured image obtained by the camera, and a touch point of the finger of the user on the operation surface is detected on the basis of the first shadow and the second shadow extracted.
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11. An operation detection method that detects an operation performed by a finger of a user with respect to an operation surface, wherein
illumination light is irradiated from different positions onto the operation surface by a plurality of illuminations, together with the finger of the user, the operation surface onto which the illumination light has been irradiated is captured by a camera, a maximum shadow density region in which a plurality of shadows of the finger of the user overlap and the brightness of the shadows is equal to or less than a predetermined threshold value is extracted on the basis of a captured image obtained by the camera, and a touch point of the finger of the user on the operation surface is detected from the maximum shadow density region.
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12. A projector comprising:
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a video projection unit that projects video; a first illumination and a second illumination that irradiate illumination light from different positions onto an operation surface at least part of which overlaps a video surface projected by the video projection unit; a camera that captures, together with the finger of the user, the operation surface onto which the illumination light has been irradiated; a shadow region extraction unit that, on the basis of a captured image obtained by the camera, extracts a first shadow of the finger of the user produced by the first illumination and a second shadow of the finger of the user produced by the second illumination; and a touch point detection unit that, on the basis of the first shadow and the second shadow extracted, detects a touch point of the finger of the user on the operation surface. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A projector that detects an operation performed by a finger of a user with respect to an operation surface, the projector comprising:
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a plurality of illuminations that irradiate illumination light from different positions onto the operation surface; a camera that captures, together with the finger of the user, the operation surface onto which the illumination light has been irradiated; a shadow region extraction unit that, from a captured image obtained by the camera, extracts a region in which a plurality of shadows of the finger of the user overlap; and a touch point detection unit that, on the basis of the region in which the plurality of shadows overlap, detects a touch point of the finger of the user on the operation surface, wherein the shadow region extraction unit extracts a portion in which the brightness of a shadow is equal to or less than a predetermined threshold value, as the region in which the plurality of shadows overlap.
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Specification