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US 8,508,653 B2Granted
Autofocus control circuit, autofocus control method, and image pickup apparatus
AssigneeRenesas Electronics Corporation
InventorToshiharu Oi
Life of this patent
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Abstract
An autofocus control circuit, includes a focusing unit determining an in-focus location of a subject image based on a contrast evaluation value of a compressed image data under a first environment, and based on a size of the compressed image data under a second environment.
Claims15
An autofocus control circuit comprising:
- a focusing unit determining an in-focus location of a subject image based on a contrast evaluation value of a compressed image data under a first environment, and based on a size of said compressed image data under a second environment,
- wherein said first environment comprises a state that is brighter than a predetermined brightness;
- and
- said second environment comprises a state that is darker than said predetermined brightness.
1 more element
An autofocus control circuit, comprising:
- an image compression unit performing an image compression process on digital captured image data generated by providing a subject image to generate compressed image data for focusing;
- and
- a focusing unit determining an in-focus location of said subject image based on a contrast evaluation value of said compressed image data when under a first environment, and based on a size of said compressed image data under a second environment,
- wherein said first environment comprises a state that is brighter than a predetermined brightness;
- and
- said second environment comprises a state that is darker than the predetermined brightness.
3 more elements
Dependencies are inferred from the claim text.