EP0718748A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pointed-position detecting apparatus and method
Assignee: Canon Inc
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Filing: 1995-12-21
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Granted: —
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Expires: 2015-12-21
Abstract
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.
Inventors
- 👤 Ryoji Fukuda
- 👤 Kazutoshi Shimada
- 👤 Eisaku Tatsumi
- 👤 Shigeki Mori
- 👤 Kazuhiro Matsubayashi
- 👤 Shinichi Sunakawa
- 👤 Takashi Harada
- 👤 Katsuhiko Nagasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:18
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/041; G06F3/042; G06F3/0425; G06F3/033; G06F3/038; G06F3/0386
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
69 words
A pointed-position detecting apparatus characterized by comprising: input means (11) for inputting a visible image; first detection means (12) for detecting a changed image area, where the visible image has changed, in the visible image inputted by said input means; and second detection means (12) for detecting a designation position in the visible image, based on a position of the changed image area detected by said first detection means.
Claim 2
Dependent Claim
18 words
The pointed-position detecting apparatus according to Claim 1, further comprising display means (13) for displaying the visible image.
Claim 3
Dependent Claim
22 words
The pointed-position detecting apparatus according to Claim 2, wherein said display means displays the visible image in accordance with a projection method.
Claim 4
Dependent Claim
28 words
The pointed-position detecting apparatus according to Claim 1, wherein said first detection means detects that visible light has been added at a desired position in the visible image.
Claim 5
Dependent Claim
26 words
The pointed-position detecting apparatus according to Claim 4, wherein addition of the visible light to the visible image is made by using a laser pointer (15).
Claim 6
Dependent Claim
31 words
The pointed-position detecting apparatus according to Claim 4, wherein said second detection means detects an approximately central position of the visible light added to the visible image, as the designation position.
Claim 7
Dependent Claim
33 words
The pointed-position detecting apparatus according to Claim 1, wherein said first detection means detects the changed image area, changed by pointing a desired position in the visible image using a pointing rod (141).
Claim 8
Dependent Claim
36 words
The pointed-position detecting apparatus according to Claim 7, wherein said second detection means detects a tip of the pointing rod included in the changed image area detected by said first detection means, as the designation position.
Claim 9
Dependent Claim
51 words
The pointed-position detecting apparatus according to Claim 1, further comprising memory means (4) for storing the visible image inputted by said input means as an original image, wherein said first detection means detects the changed image area by comparing a visible image inputted by said input means with the original image.
Claim 10
Dependent Claim
41 words
The pointed-position detecting apparatus according to Claim 1, further comprising judgment means (12) for judging existence/absence of operation designation, based on whether or not the changed image area detected by said first detection means in the visible image has further changed.
Claim 11
Dependent Claim
40 words
The pointed-position detecting apparatus according to Claim 10, wherein said first detection means detects visible light added to the visible image, and wherein said judgment means judges the existence/absence of operation designation based on color change of the visible light.
Claim 12
Dependent Claim
44 words
The pointed-position detecting apparatus according to Claim 10, wherein said first detection means detects visible light added to the visible image, and wherein said judgment means judges the existence/absence of operation designation based on existence/absence of going on and off of the visible light.
Claim 13
Dependent Claim
17 words
The pointed-position detecting apparatus according to Claim 1, wherein said input means is an image sensing device.
Claim 14
Dependent Claim
74 words
A pointed-position detecting method characterized by comprising: an input step of inputting a visible image (S41, S42) ; a first detection step (S43) of detecting a changed image area, where the visible image has changed, in the visible image inputted at said input step; and a second detection step (S44) of detecting a designation position in the visible image, based on a position of the changed image area detected at said first detection step.
Claim 15
Dependent Claim
19 words
The pointed-position detecting method according to Claim 14, further comprising a display step (3) of displaying the visible image.
Claim 16
Dependent Claim
24 words
The pointed-position detecting method according to Claim 15, wherein at said display step, the visible image is displayed in accordance with a projection method.
Claim 17
Dependent Claim
28 words
The pointed-position detecting method according to Claim 14, wherein at said first detection step, addition of visible light at a desired position in the visible image is detected.
Claim 18
Dependent Claim
25 words
The pointed-position detecting method according to Claim 17, wherein addition of the visible light to the visible image is made by using a laser pointer.
Claim 19
Dependent Claim
33 words
The pointed-position detecting method according to Claim 17, wherein at said second detection step, an approximately central position of the visible light added to the visible image is detected as the designation position.
Claim 20
Dependent Claim
33 words
The pointed-position detecting method according to Claim 14, wherein at said first detection, the changed image area, changed by pointing a desired position in the visible image using a pointing rod, is detected.
Claim 21
Dependent Claim
38 words
The pointed-position detecting method according to Claim 20, wherein at said second detection step, a tip of the pointing rod included in the changed image area, detected at said first detection step, is detected as the designation position.
Claim 22
Dependent Claim
53 words
The pointed-position detecting method according to Claim 14, further comprising a memory step of storing the visible image inputted at said input step as an original image, wherein at said first detection step, the changed image area is detected by comparing a visible image inputted at said input step with the original image.
Claim 23
Dependent Claim
42 words
The pointed-position detecting method according to Claim 14, further comprising a judgment step (S46) of judging existence/absence of operation designation, based on whether or not the changed image area detected at said first detection step in the visible image has further changed.
Claim 24
Dependent Claim
44 words
The pointed-position detecting method according to Claim 13, wherein at said first detection step, visible light added to the visible image is detected, and wherein at said judgment step, the existence/absence of operation designation is judged based on color change of the visible light.
Claim 25
Dependent Claim
48 words
The pointed-position detecting method according to Claim 24, wherein at said first detection step, visible light added to the visible image is detected, and wherein at said judgment step, the existence/absence of operation designation is judged based on existence/absence of going on and off of the visible light.
Claim 26
Dependent Claim
19 words
The pointed-position detecting method according to Claim 14, wherein at said input step, an image sensing device is employed.
Claim 27
Dependent Claim
93 words
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: input process procedure codes for inputting a displayed visible image; first 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; and second detection process procedure codes for detecting a pointed position in the visible image based on a position of the changed image area detected at said first detection process.
References Cited (Backward Citations)
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