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Image viewfinding device and automatic focusing method thereof

An image capture device and auto focus technology, applied in the field of photography, can solve problems such as unclear images

Inactive Publication Date: 2009-04-15
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when the multiple objects that the user wants to shoot are not in the area, the image of some objects may not be clear

Method used

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  • Image viewfinding device and automatic focusing method thereof
  • Image viewfinding device and automatic focusing method thereof
  • Image viewfinding device and automatic focusing method thereof

Examples

Experimental program
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Embodiment Construction

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] see figure 1 , is a functional block diagram of an image capture device 100 provided by an embodiment of the present invention. The image capturing device 100 includes a lens 10 , an image sensor 20 , an A / D converter 30 , an image processing unit 40 , a microprocessor 50 , a driving mechanism 60 , a memory 70 and an input device 80 . The image capture device 100 can specifically be a digital camera, a digital video camera, or a mobile phone with a camera.

[0015] The lens 10 can be a zoom lens or a fixed focus lens, which is used to image the captured image onto the image sensor 20 .

[0016] The image sensor 20 is used to acquire the image of the shot frame and output an electrical signal. The image sensor 20 is disposed on the image side of the lens 10 and may be a charge-coupled device or a complementary metal-oxide semiconductor. The image se...

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Abstract

The invention relates to an automatic focusing method of an image acquisition device. The method comprises the steps as follows: (a) an automatic focusing area is selected in the picture to be shot, and a focusing weighing is set for each focusing area in the picture; (b) a lens is moved to a relative position, and an image is obtained at the relative position; (c) the evaluation of estimate of the image is calculated according to the selected automatic focusing area and the focusing weighing of each focusing area; (d) the evaluation of estimate and the relative position of the corresponding lens are stored; (e) the steps (b)-(d) are repeated to acquire a plurality of images; the relative position of the lens corresponding to the image with the maximum evaluation of estimate is obtained according to a plurality of evaluations of estimate corresponding to a plurality of images and the relative position of a plurality of lenses, and the shooting position is determined; and (f) the lens is moved to the shooting position. In addition, the invention also provides an image acquisition device adopting the automatic focusing method.

Description

technical field [0001] The present invention relates to photographing technology, in particular to an image capture device and an automatic focusing method thereof. Background technique [0002] In the process of image shooting, the distance between the camera or video camera and the object is often changed, so the image is often blurred due to exceeding the depth of field range. In order to keep the image clear, it is necessary to change the focus position of the lens during the viewfinder process to keep the image clear. This process of adjusting the focus position is called focusing or focusing. [0003] Autofocus technology has been widely used in imaging fields such as cameras, video cameras, and image scanning. It enables the imaging system to automatically adjust the position of the focusing lens group in the lens according to the distance of the object, so that the object is clearly imaged on the imaging plane. [0004] At present, most of the focusing techniques ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B13/36G02B7/28H04N5/225H04N5/232
CPCG03B13/36G02B7/36
Inventor 王威仁郑诗宝
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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