Title:
フォーカス信号を発生する方法
Document Type and Number:
Japanese Patent JP5825566
Kind Code:
B2
Abstract:
An auto focus image system that includes a pixel array coupled to a focus signal generator. The pixel array captures an image that has at least one edge. The focus signal generator may generate a focus signal that is a function of a width of the edge and/or statistics of widths of edges. A processor receives the focus signal and/or the statistics of the widths and adjusts a focus position of a focus lens. The width can be determined by various techniques including the use of gradients. An width determined along a prescribed direction is corrected for a slant of a boundary to which the edge belongs relative to the prescribed direction. The correction may use a peak gradient in the prescribed direction along the edge in conjunction with a largest gradient of a perpendicular direction within a predefined neighborhood of the peak gradient.
Inventors:
Hyuk Nam, Thailand
Application Number:
JP2014039306A
Publication Date:
December 02, 2015
Filing Date:
February 28, 2014
Export Citation:
Assignee:
Hyuk Nam, Thailand
International Classes:
G02B7/36; G02B7/28; G03B13/36; H04N5/232
Domestic Patent References:
| JP2009044757A | ||||
| JP2006171840A |
Attorney, Agent or Firm:
▲吉▼川 俊雄
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