Image shake detecting device
First Claim
1. An image shake detecting device for detecting a shake of an image on an image sensing plane on the basis of an image signal output from image sensing means, comprising:
- a) first detection means for detecting the displacement of the image on the basis of an image signal corresponding to a first detection area set on said image sensing plane;
b) second detection means for detecting the displacement of the image on the basis of an image signal corresponding to a second detection area set on said image sensing plane;
c) switching means for selecting one of said first detection means and said second detection means; and
d) image shake detecting means for computing the shake of the image on the basis of an output of said first detection means or said second detection means selected by said switching means.
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Accused Products
Abstract
An image shake detecting device for detecting a shake of an image on an image sensing plane on the basis of a video signal output from an image sensor includes detection circuits arranged to detect image displacement in a plurality of areas set on the image sensing plane, and a control microcomputer which makes a discrimination, on the basis of information output from these detection circuits, between a movement of a camera and a solo movement of a photographed object. The device thus accurately makes compensation for an image shake by judging the state of the image on the basis of information output from these detection circuits. The image shake detecting device further includes a computing circuit arranged to compute a quantity of an image shake on the basis of a difference in detecting timing of a feature point of the image and a sensitivity control circuit arranged to change the detection sensitivity of the shake detection circuits. Further disclosed is an object tracing device to which the invented image shake detecting device is applied.
84 Citations
56 Claims
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1. An image shake detecting device for detecting a shake of an image on an image sensing plane on the basis of an image signal output from image sensing means, comprising:
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a) first detection means for detecting the displacement of the image on the basis of an image signal corresponding to a first detection area set on said image sensing plane; b) second detection means for detecting the displacement of the image on the basis of an image signal corresponding to a second detection area set on said image sensing plane; c) switching means for selecting one of said first detection means and said second detection means; and d) image shake detecting means for computing the shake of the image on the basis of an output of said first detection means or said second detection means selected by said switching means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An image shake detecting device for detecting a shake of an image on an image sensing plane on the basis of an image signal output from image sensing means, comprising:
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a) movement detecting means for detecting the displacement of the image on the basis of an image signal corresponding to a predetermined detection area set on said image sensing plane; b) compensating means for compensating for a movement of the image, by displacing an optical axis of a photo-taking optical system which images an incident light on an imaging plane of said image sensing means, on the basis of information on the displacement of the image output from said movement detecting means; c) sharpness detecting means for detecting a signal component indicative of a sharpness of the image on the basis of an image signal corresponding to said detection area; and d) control means for controlling an operation of said compensation means and/or movement detecting means on the basis of an output of said sharpness detecting means. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An image shake detecting device for detecting a shake of an image on an image sensing plane on the basis of an image signal output from image sensing means, comprising:
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a) extracting means for extracting a feature point from within said image sensing plane; b) detection means for detecting a difference in generation timing of said feature point between a plurality of temporally different images; c) computing means for computing a quantity of the shake of the image on the basis of an output of said detection means; and d) sensitivity control means for varying a sensitivity of said detection means. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An image shake detecting device comprising:
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a) scanning means for scanning at the same speed a plurality of images obtained at intervals of a predetermined period of time; b) detection means for detecting a time difference between said plurality of images in timing at which corresponding points of feature are generated during a scanning process of said scanning means, by counting the number of clock pulses; c) computing means for detecting a quantity of a shake of an image by computing an output of said detection means; and d) sensitivity control means for varying a detection sensitivity of said detection means by changing a period of said clock pulses. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46)
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47. A control device for an image sensing optical system, comprising:
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a) first control means for feedback-controlling said image sensing optical system on the basis of detection information obtained by timewise dispersively detecting a state of said image sensing optical system; b) memory means for storing control information obtained on the basis of a quantity of control performed over said image sensing optical system when said detection information is sampled; and c) second control means for controlling said image sensing optical system on the basis of a result obtained by computing said control information stored in said memory means and said detection information. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56)
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Specification