Focusing system and image input apparatus having automatic focusing system which uses digital processing
First Claim
Patent Images
1. An automatic focusing system comprising:
- an image pickup system for picking up an image and for outputting an image signal;
compression means for digitally compressing the image signal from said image pickup system and for outputting a compressed image signal;
operation means for obtaining focal information by carrying out a digital operation on the compressed image signal; and
adjusting means responsive to the focal information for automatically adjusting a focal point of said image pickup system to an in-focus position.
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Abstract
An automatic focusing system includes an image pickup system for picking up an image and for outputting an image signal, a compression part for digitally compressing the image signal from the image pickup system and for outputting a compressed image signal, an operation part for obtaining focal information by carrying out a digital operation on the compressed image signal, and an adjusting part responsive to the focal information for automatically adjusting a focal point of the image pickup system to an in-focus position.
74 Citations
15 Claims
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1. An automatic focusing system comprising:
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an image pickup system for picking up an image and for outputting an image signal; compression means for digitally compressing the image signal from said image pickup system and for outputting a compressed image signal; operation means for obtaining focal information by carrying out a digital operation on the compressed image signal; and adjusting means responsive to the focal information for automatically adjusting a focal point of said image pickup system to an in-focus position. - View Dependent Claims (2, 3, 4, 5)
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6. An image input apparatus having an automatic focusing system, said image input apparatus comprising:
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an image pickup system for picking up an image and for outputting an image signal; compression means for digitally compressing the image signal from said image pickup system and for outputting a compressed image signal; switching means for outputting a high-frequency component of the compressed image signal in a first mode and for outputting a low-frequency component of the compressed image signal in a second mode; operation means for obtaining focal information by carrying out a digital operation on the compressed image signal including the high-frequency component from the switching means in the first mode; adjusting means responsive to the focal information for automatically adjusting a focal point of said image pickup system to an in-focus position; and transfer means for transferring the compressed image data including the low-frequency component from said switching means in the second mode, said image pickup system, said compression means, said operation means and said adjusting means forming said automatic focusing system. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification