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| OF THE PREFERRED EMBODIMENT A block diagram of the present invention is shown in FIG. 1. Image ... |
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| The primary object of the present invention is to provide an apparatus for preventing internal ... |
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| Apparatus using serial data line to turn on a transceiver or other device |
| We claim: 1. An apparatus for conserving power in an electrical device, said apparatus comprising: ... |
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| Electronic still camera that can be directly inserted in an external device |
| In consideration of the foregoing, an object of the present invention is to provide an electronic ... |
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Image blur preventing apparatus
| Details |
Inventors: Shiomi, Yasuhiko;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Garber; Wendy R.
Assistant Examiner: Nguyen; Luong
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto
An image blur prevention apparatus adapted to a camera having an exposure portion, includes a first image blur detecting device that detects an image blur state of the camera, a second image blur detecting device that detects an image blur state of an optical image of the camera, and outputs a detection signal, and a determining portion that determines a photographing operation state of the camera. A calculating device, having a first calculation program and a second calculation program, selects one calculation program from among the first and second calculating programs based on a determination result of the determining portion and based on the detection signal of the second image blur detection device, and calculates a predicted blur signal in accordance with the selected calculation program. An image blur prevention device then performs an image blur prevention operation based on the detection signal of the first image blur detecting device and the predicted blur signal calculated by the calculating device, during a light exposing operation onto the exposure portion of the camera. |
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DETAILED DESCRIPTION It is the object of the present invention to provide a blur preventing control apparatus which can calculate an optimum predicted blur waveform for image blur control during exposure by the operational state or the state of fluctuation of a camera.
One aspect of the invention is an image blur preventing apparatus applicable to a camera which has an image blur detecting device for detecting an image blur state, a predicting portion for predicting the image blur state after a predetermined point of time on the basis of the detection output of the image blur detecting device at the point of time, and forming a predicted image blur signal corresponding to the image blur state, an image blur preventing device for performing an image blur preventing operation in accordance with the predicted image blur signal obtained by the predicting portion, and a changing portion for changing the manner of the prediction by the predicting portion in accordance with the photographing operation state of the camera, whereby optimum prediction is effected in accordance with the state of the camera.
Another aspect of the invention is a signal forming apparatus for use for the image blur prevention of a camera and for forming a signal corresponding to an image blur state which has an image blur detecting device for detecting an image blur state, a predicting portion for predicting the image blur state after a predetermined point of time on the basis of the detection output of the image blur detecting device at the predetermined point of time, and forming a predicted image blur signal corresponding to the image blur state, and a changing portion for changing the manner of the prediction by the predicting portion in accordance with the photographing operation state of the camera, or a camera having such a signal forming apparatus, whereby optimum prediction is effected in accordance with the state of the camera.
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