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Method and system achieving integrated camera automatic focusing

An automatic focusing and camera technology, which is applied to focusing devices, components of TV systems, cameras, etc. to achieve the effects of continuous satisfaction, accurate zoom tracking curve, and satisfactory focusing effect.

Inactive Publication Date: 2014-01-29
SUZHOU KEDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the fact that in the prior art, the automatic focusing cannot be completed in real time, efficiently and accurately, thus proposing a method and system for realizing the automatic focusing of an integrated camera

Method used

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  • Method and system achieving integrated camera automatic focusing
  • Method and system achieving integrated camera automatic focusing
  • Method and system achieving integrated camera automatic focusing

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Experimental program
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Embodiment 1

[0058] This embodiment provides a method for realizing automatic focusing of an integrated camera, such as figure 2 shown, including the following steps:

[0059] S1: Obtain an object distance interval to be estimated according to the initial zoom factor and the initial focus position combined with at least two pre-stored zoom tracking curves.

[0060] S2: Divide the object distance interval to be estimated equally, and establish a mapping relationship between the object distance interval and the focus position accordingly.

[0061] S3: Obtain an actual object distance interval according to the initial zoom factor, the initial focus position, and the pre-stored zoom tracking curve.

[0062] S4: Obtain the focus position values ​​corresponding to the two end point values ​​of the actual object distance interval according to the mapping relationship, and take the average value thereof as the focus position value.

[0063] S5: Establish a focus control function through the var...

Embodiment 2

[0109] This embodiment provides a system for realizing automatic focusing of an integrated camera, such as Figure 6 shown, including:

[0110] The object distance interval acquisition module to be estimated is used to acquire the object distance interval to be estimated according to the initial zoom factor and the initial focus position combined with at least two pre-stored zoom tracking curves.

[0111] A mapping relationship building module: used to equally divide the object distance interval to be estimated, and establish a mapping relationship between the object distance interval and the focus position accordingly.

[0112] Actual object distance calculation module: used to obtain the actual object distance interval according to the initial zoom factor, the initial focus position and the pre-stored zoom tracking curve.

[0113] Focus position acquisition module: used to obtain the focus position values ​​corresponding to the two end point values ​​of the actual object di...

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Abstract

The invention provides a method and system for achieving integrated camera automatic focusing, and provides a zooming tracking method based on a relationship type, namely for a shot object at a fixed object distance, according to the initial zooming multiple, the value of an initial focusing position and a plurality of zooming tracking curves stored in advance, the mapping relation between the object distance interval and the focusing position is constructed, and the position to be focused is calculated in real time. Then, a gradient control function obtained by the combination of the statistical law of a lot of experimental data is utilized to achieve mobility control over a zooming motor and a focusing motor, the value of the position to be focused is improved and amended to a certain degree, the value of the position to be focused is closer to a real zooming tracking curve, and an automatic focusing effect is more accurate. Meanwhile, the zooming tracking curves are not needed to be stored in advance, all the zooming tracking curves corresponding to different object distances are not needed to be calculated point by point, an algorithm is simple, it is possible that the zooming speed meets a real-time property, and the focusing effect can meet the requirement for clearness in the whole process.

Description

technical field [0001] The invention belongs to the technical field of automatic focusing, and in particular relates to a method and system for realizing automatic focusing of an integrated camera, in particular to a method and system for realizing automatic focusing based on a zoom tracking curve. Background technique [0002] Such as figure 1 As shown, the integrated camera includes an image acquisition module, an image processing module and an imaging control module. The image acquisition module includes a zoom lens group 102, a focusing lens group 103 and an image sensor 104. Light rays 101 emitted or reflected by objects in the scene converge on the target surface of the image sensor 104 through the zoom lens group 102 and the focusing lens group 103 to form a clear image. Like, that is, focus. The image sensor converts the formed image into an electrical signal. The imaging control module 107 is used to control the zoom motor 105 and the focus motor 106 to move the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G02B7/09G03B13/36
Inventor 张鑫曹李军陈卫东
Owner SUZHOU KEDA TECH
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