Auto focusing apparatus and control method

Patent metadata

Field	Value
Publication number	US-8947580-B2
Application number	US-201313764838-A
Country	US
Kind code	B2
Filing date	Feb 12, 2013
Priority date	Aug 18, 2009
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

The invention includes steps of setting a main area set within the frame of a photographed image signal, and a plurality of auxiliary areas each of which is smaller than the main area, selecting one or a plurality of focus detection areas from the main area and the auxiliary areas in accordance with the in-focus position of a focus lens based on the focus signals of the main area and the auxiliary areas, and controlling the focus lens to move to the in-focus position of the focus lens in the focus detection area selected in the selecting step.

First claim

What is claimed is:

1. An auto focusing apparatus comprising:
a detection unit which detects a focus signal indicating a focus state to an object in a focus detection area set within a frame of a photographed image signal;
an object information acquisition unit which acquires one or a plurality of pieces of object information within the frame based on the image signal;
an extraction unit which extracts a main object as an object to be focused from the object information obtain…

Assignees

• Canon Kk

Inventors

• Wada Akiko

Classifications

• H04N23/61

  Electricity · mapped topic

• H04N23/611

  Electricity · mapped topic

• H04N23/673

  Electricity · mapped topic

• H04N23/675 Primary

  Electricity · mapped topic

• H04N23/635

  Electricity · mapped topic