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US 8,571,403 B2Granted
Autofocus system
AssigneeNational Taiwan University
InventorsTung-Chan Tsai, Homer H. Chen
Life of this patent
Estimating the term…
Abstract
In an autofocus system, a focus measurement unit receives an image, and accordingly generates an associated focus value. A focus transform unit receives and then transforms the focus value provided by the focus measurement unit, therefore generating an associated transformed focus value. An in-focus position estimation unit obtains an in-focus position, in an analytical manner, according to some transformed focus values and some associated lens positions.
Claims18
An autofocus system, comprising:
- a focus measurement unit configured to receive an image and accordingly generate an associated focus value;
- a focus transform unit configured to receive the focus value provided by the focus measurement unit and then transform the focus value, thereby generating an associated transformed focus value;
- and
- an in-focus position estimation unit configured to obtain an in-focus position, in an analytical manner, according to a plurality of the transformed focus values and a plurality of associated lens positions.
1 more element
An autofocus method, comprising:
- receiving an image and accordingly generating an associated focus value;
- receiving the focus value and then transforming the focus value, thereby generating an associated transformed focus value;
- and
- obtaining an in-focus position, in an analytical manner, according to a plurality of the transformed focus values and a plurality of associated lens positions.
1 more element
Dependencies are inferred from the claim text.