US6151070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pickup apparatus
Assignee: Canon Inc
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Filing: 1996-08-16
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Granted: 2000-11-21
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Expires: 2016-08-16
Abstract
Abstract An image pickup apparatus includes a zoom lens, an electronic-zoom part for varying a magnification by subjecting a video to the processing of electronically varying an angle of view, a detecting circuit for detecting a spatial frequency of the video signal, and a control circuit for controlling a magnification of the electronic-zoom part on the basis of information indicative of the spatial frequency detected by the detecting circuit.
Inventors
- 👤 Hidekage Sato
- 👤 Tadashi Okino
- 👤 Takashi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:21
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/2628; H04N23/00; H04N23/60; H04N23/68; H04N23/681; H04N23/6811; H04N23/682; H04N23/683; H04N23/69
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
An image pickup apparatus comprising: optical-zoom means for varying an angle of view by using an optical system; electronic-zoom means for varying the angle of view by using electronic image processing; detecting means for detecting a predetermined frequency component of an image signal; and control means for varying a set value of a zoom magnification of said electronic-zoom means on the basis of a detection result by said detecting means, such as to reduce the zoom magnification of said electronic-zoom means in the case that the predetermined frequency component is larger than a predetermined reference signal.
Claim 2
Dependent Claim
96 words
An image pickup apparatus comprising: optical-zoom means for varying an angle of view by using an optical system; electronic-zoom means for varying the angle of view by using electronic image processing; detecting means for detecting a predetermined frequency component of an image signal; and control means for varying a set value of a zoom magnification of said electronic-zoom means on the basis of a detection result by said detecting means, such as to reduce the zoom magnification of said electronic-zoom means in the case that the predetermined frequency component is larger than a predetermined reference signal.
Claim 3
Dependent Claim
56 words
An image pickup apparatus according to claim 1, wherein said control means controls a lens position of said optical-zoom means by setting a zoom magnification of said optical-zoom means to keep constant an overall zoom magnification determined by a multiplication of the zoom magnification of said optical-zoom means by the zoom magnification of said electronic-zoom means.
Claim 4
Dependent Claim
62 words
An image pickup apparatus according to claim 1, further comprising image-shake detecting means for detecting an image shake due to a vibration applied to an apparatus body and image-shake correcting means for providing control to read part of the image signal from a memory so as to correct the image shake on the basis of an output of said image-shake detecting means.
Claim 5
Dependent Claim
81 words
A zooming apparatus comprising: electronic-zoom means for varying the angle of view by using electronic image processing; detecting means for detecting a predetermined frequency component of an image signal; and control means for varying a set value of a zoom magnification of said electronic-zoom means on the basis of a detection result by said detecting means, such as to reduce the zoom magnification of said electronic-zoom means in the case that the predetermined frequency is larger than a predetermined reference value.
Claim 6
Dependent Claim
81 words
A zooming apparatus comprising: electronic-zoom means for varying the angle of view by using electronic image processing; detecting means for detecting a predetermined frequency component of an image signal; and control means for varying a set value of a zoom magnification of said electronic-zoom means on the basis of a detection result by said detecting means, such as to reduce the zoom magnification of said electronic-zoom means in the case that the predetermined frequency is larger than a predetermined reference value.
Claim 7
Dependent Claim
51 words
A zooming apparatus according to claim 4, further comprising optical-zoom means for optically varying the angle of view, and wherein said control means controls said optical-zoom means to keep constant a total zoom magnification determined by the zoom magnification of said optical-zoom means and the zoom magnification of said electronic-zoom means.
Claim 8
Dependent Claim
56 words
A zooming apparatus according to claim 4, further comprising image-shake detecting means for detecting an image shake due to a vibration and image-shake correcting means for providing control to read part of the image signal from a memory so as to correct the image shake on the basis of an output of said image-shake detecting means.
Claim 9
Dependent Claim
73 words
A zooming method comprising: electronic-zooming to vary the angle of view by using electronic image processing; detecting a predetermined frequency component of an image signal; and varying a set value of a zoom magnification of said electronic-zooming on the basis of a detection result in said detecting step, such that the zoom magnification of said electronic-zooming is reduced in the case that the predetermined frequency component is higher than a predetermined reference value.
Claim 10
Dependent Claim
73 words
A zooming method comprising: electronic-zooming to vary the angle of view by using electronic image processing; detecting a predetermined frequency component of an image signal; and varying a set value of a zoom magnification of said electronic-zooming on the basis of a detection result in said detecting step, such that the zoom magnification of said electronic-zooming is reduced in the case that the predetermined frequency component is higher than a predetermined reference value.
Claim 11
Dependent Claim
45 words
A zooming method according to claim 7, further comprising optical-zooming to optically varying the angle of view, and wherein said optical-zooming is controlled to keep constant a total zoom magnification determined by the zoom magnification of said optical-zooming and the zoom magnification of said electronic-zooming.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-21 | 2004-05-22 | 2004-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-21 | 2008-05-22 | 2008-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-21 | 2012-05-22 | 2012-11-21 | $7700.00 | Window Closed / Lapsed |