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US 2011/0236007 A1Published application
Imaging apparatus performing auto focusing function with plurality of band pass filters and auto focusing method applied to the same
AssigneeSamsung Electric Co., Ltd.
InventorsKyong-Tae Park, Jeong-Won Lee, Kyoung-Hwan Moon
Life of this patent
Estimating the term…
Abstract
An imaging apparatus and an auto focusing method are provided. A plurality of focus signal values are calculated for a plurality of frequency bands of a captured image signal. An amount of defocus of a focus lens is calculated based on focus signal values calculated for two positions. A position of the focus lens is controlled depending on the calculated amount of defocus. Thereby, the imaging apparatus can detect a focus at higher speed.
Claims22
An imaging apparatus comprising:
- a lens unit including an optical system having a focus lens;
- a driving unit that drives the lens unit;
- an image pickup unit that detects light having passed through the lens unit to generate an image signal;
- an auto focusing unit that calculates and outputs a plurality of focus signal values for a plurality of frequency bands of the image signal generated in the image pickup unit;
- and
- a control unit that calculates an amount of defocus of the focus lens, based on first focus signal values, which are the plurality of focus signal values at a first position of the focus lens, and second focus signal values, which are the plurality of focus signal values at a second position of the focus lens, and controls the driving unit so that a position of the focus lens is moved depending on the calculated amount of defocus.
3 more elements
An auto focusing method comprising:
- detecting light having passed through a lens unit to generate an image signal;
- calculating a plurality of focus signal values for a plurality of frequency bands of the generated image signal;
- calculating an amount of defocus of a focus lens, based on first focus signal values, which are the plurality of focus signal values at a first position of the focus lens, and second focus signal values, which are the plurality of focus signal values at a second position of the focus lens;
- and
- driving the focus lens so that a position of the focus lens is moved depending on the calculated amount of defocus.
2 more elements
Dependencies are inferred from the claim text.