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Image capture apparatus and auto focus control method

A photography device and focus control technology, which is applied to focus devices, installations, TVs, etc., can solve problems such as inability to focus automatically and decline in face recognition accuracy

Inactive Publication Date: 2007-02-21
CASIO COMPUTER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, according to the AF processing of the conventional image recognition, when the face is recognized by the image recognition processing in the state of being out of focus, that is, in the state of the image being blurred, the recognition accuracy of the face decreases, and as a result, sometimes There is a phenomenon that automatic focus cannot be performed when the face is in focus.

Method used

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  • Image capture apparatus and auto focus control method
  • Image capture apparatus and auto focus control method
  • Image capture apparatus and auto focus control method

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Experimental program
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Embodiment approach

[0015] A. Structure of digital camera

[0016] figure 1 is a block diagram showing an electrical schematic configuration of a digital still camera 1 realizing the imaging device of the present invention.

[0017] A digital camera 1 includes a photographic lens 2, a lens drive block (block) 3, an aperture and shutter 4, a CCD 5, a TG (timing generator) 6, a unit circuit 7, a DRAM 8, a memory 9, a CPU 10, a flash memory 11, an image display unit 12, Key input unit 13 , sound processing unit 14 , flash drive unit 15 , and flash light emitting unit 16 .

[0018] The photographic lens 2 includes a focus lens (not shown) and a zoom lens, and is connected to a lens drive block 3 . The lens drive block 3 is composed of a focus motor and a zoom motor that drive the unillustrated focus lens and zoom lens to the direction of the optical axis, and drives the focus motor and the zoom motor to the direction of the optical axis according to the control signal from the CPU10. It is compose...

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Abstract

An image capture apparatus comprising an image capture unit which captures an image of a subject, a first focus control unit which performs a predetermined focus operation for the subject, a first image recognition unit which, after the predetermined focus operation by the first focus control unit, recognizes a position of the subject based on image data obtained by the image capture unit, and a second focus control unit which moves a focus lens to a focusing lens position where an image at the position of the subject recognized by the first image recognition unit comes into focus.

Description

technical field [0001] The invention relates to a photographing device with an automatic focus function and an automatic focus control method that can be used in a digital camera. Background technique [0002] In order to obtain a good image, a digital camera has an automatic focus control method for bringing into focus a subject to be photographed. [0003] However, in the existing automatic focus function, the person who wants to be photographed is not in focus, but other subjects such as scenery are in focus, so there is a problem that the subject that is really wanted to be photographed is not in focus. The problem. [0004] In order to solve this problem, there has been AF processing that automatically focuses in such a way that the face of the subject is recognized by image recognition processing and the recognized face position is brought into focus (for example, refer to Japanese Laid-Open Patent Publication 2004-2004). Bulletin No. 317699). [0005] However, acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/225
CPCH04N5/23212G03B13/36G03B17/20H04N5/23219H04N23/673H04N23/61H04N23/611H04N23/635G02B7/28G02B7/36H04N23/75
Inventor 涩谷敦
Owner CASIO COMPUTER CO LTD