Automatic focusing method and digital photographing apparatus using the same
First Claim
1. An automatic focusing method in which a photograph region is brought into focus through automatic movement of a focal lens to a focal position, in response to a photographing-command signal, the method comprising:
- (a) dividing the photograph region into a plurality of horizontal sub-regions having a common horizontal position and vertical sub-regions having a common vertical position;
(b) obtaining focal position values for the horizontal and vertical sub-regions;
(c) selecting a first focal position value from the horizontal sub-regions, if all horizontal sub-regions have the same first focal position value;
(d) selecting a second focal position value from the vertical sub-regions, if all vertical sub-regions have the same second focal position value;
(e) selecting from the first and second focal position values, a particular focal position value having the shortest focal distance; and
(f) moving the focal lens to a focal position corresponding to the particular focal position value.
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0 Petitions
Accused Products
Abstract
Provided are an automatic focusing method in which a photograph region is brought into focus through automatic movement of a focal lens to a focal position, in response to a photographing-command signal, and a digital photographing apparatus using the method. The method includes dividing the photograph region into a plurality of sub-regions, focusing on the sub-regions and obtaining focal position values, selecting a same focal position value if sub-regions in the same horizontal position have the same focal position value, selecting a same focal position value if sub-regions in the same vertical position have the same focal position value, and moving the focal lens to a focal position corresponding to a focal position value having the shortest focal distance among the selected focal position values.
14 Citations
8 Claims
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1. An automatic focusing method in which a photograph region is brought into focus through automatic movement of a focal lens to a focal position, in response to a photographing-command signal, the method comprising:
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(a) dividing the photograph region into a plurality of horizontal sub-regions having a common horizontal position and vertical sub-regions having a common vertical position;
(b) obtaining focal position values for the horizontal and vertical sub-regions;
(c) selecting a first focal position value from the horizontal sub-regions, if all horizontal sub-regions have the same first focal position value;
(d) selecting a second focal position value from the vertical sub-regions, if all vertical sub-regions have the same second focal position value;
(e) selecting from the first and second focal position values, a particular focal position value having the shortest focal distance; and
(f) moving the focal lens to a focal position corresponding to the particular focal position value. - View Dependent Claims (2, 3, 4)
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5. A digital photographing apparatus using an automatic focusing method in which a photograph region is brought into focus through automatic movement of a focal lens to a focal position, in response to a photographing-command signal, the method comprising:
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(a) dividing the photograph region into a plurality of horizontal sub-regions having a common horizontal position and vertical sub-regions having a common vertical position;
(b) obtaining focal position values for the horizontal and vertical sub-regions;
(c) selecting a first focal position value from the horizontal sub-regions, if all horizontal sub-regions have the same first focal position value;
(d) selecting a second focal position value from the vertical sub-regions, if all vertical sub-regions have the same second focal position value;
(e) selecting from the first and second focal position values, a particular focal position value having the shortest focal distance; and
(f) moving the focal lens to a focal position corresponding to the particular focal position value. - View Dependent Claims (6, 7, 8)
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Specification