Image pickup apparatus having auto-centering function
First Claim
1. An image pickup apparatus which uses an imaging device for producing an imaging device output signal containing an object image signal representing an object image focused on its photosensitive surface which is larger than the object image and provides a video output signal corresponding to the object image, comprising:
- a detector which detects the position of boundary between the object image signal and the other signal in the imaging device output signal in accordance with their difference in magnitude;
shift amount computing unit which computes shift amounts required to display the object image in a desired position on a display screen, based on the boundary position detected by the detector; and
signal processing unit which shifts the object image according to the shift amounts computed by the shift amount computing unit and provides a video signal containing the shifted object image as the video output signal.
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Accused Products
Abstract
An address detector detects the position of boundary between an object image signal and other signal in an image output signal from an imaging device according to the difference in magnitude therebetween. A shift amount computation unit computes the shift amounts required to display the object at the center of a display screen according to the boundary position. A shift circuit shifts the phases of horizontal and vertical sync signals generated by a sync signal generator according to the shift amounts. A driving pulse generator generates driving pulses to drive the imaging device in response to the shifted horizontal and vertical sync signals. A sync adder adds the sync signals to the output signal of the imaging device and provides the resulting signal as a video output signal.
8 Citations
17 Claims
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1. An image pickup apparatus which uses an imaging device for producing an imaging device output signal containing an object image signal representing an object image focused on its photosensitive surface which is larger than the object image and provides a video output signal corresponding to the object image, comprising:
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a detector which detects the position of boundary between the object image signal and the other signal in the imaging device output signal in accordance with their difference in magnitude;
shift amount computing unit which computes shift amounts required to display the object image in a desired position on a display screen, based on the boundary position detected by the detector; and
signal processing unit which shifts the object image according to the shift amounts computed by the shift amount computing unit and provides a video signal containing the shifted object image as the video output signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image pickup apparatus comprising:
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an imaging device which produces an imaging device output signal containing an object image signal representing an image of an object focused on its photosensitive surface which is larger than the object image;
a detector which detects the position of boundary between the object image signal and the other signal in the imaging device output signal in accordance with their difference in magnitude;
a shift amount computing unit responsive to the boundary position detected by the detector which computes shift amounts required to display the object image in a desired position on a display screen; and
a signal processing unit which shifts the object image according to the shift amounts computed by the shift amount computing unit and provides a video signal containing the shifted object image as a video output signal of the image pickup apparatus. - View Dependent Claims (8, 9, 10)
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11. An image pickup apparatus which uses an imaging device for producing an imaging device output signal containing an object image signal representing an object image focused on its photosensitive surface which is larger than the object image and provides a video output signal corresponding to the object image, comprising:
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detecting means for detecting the position of boundary between the object image signal and the other signal in the imaging device output signal in accordance with their difference in magnitude;
shift amount computing means responsive to the boundary position detected by the detecting means for computing shift amounts required to display the object image in a desired position on a display screen; and
signal processing means for shifting the object image according to the shift amounts computed by the shift amount computing means and providing a video signal containing the shifted object image as the video output signal. - View Dependent Claims (12, 13, 14)
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15. A method for providing a video output signal corresponding to an image of an object using an imaging device for producing an imaging device output signal containing an object image signal representing the object image focused on its photosensitive surface which is larger than the object image comprising:
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detecting the position of boundary between the object image signal and the other signal in the imaging device output signal in accordance with their difference in magnitude;
computing shift amounts required to display the object image in a desired position on a display screen according to the boundary position detected; and
shifting the object image according to the shift amounts computed and providing a video signal containing the shifted object image as the video output signal. - View Dependent Claims (16, 17)
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Specification