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Real-time automatic focusing method

An auto-focusing, one-pair technology, applied in focusing device, installation, optics, etc., can solve problems such as unreasonable focusing program design, difficult to affect focusing accuracy, failure to achieve real-time focusing, etc., to achieve fast focusing speed and action. Flexible, waste-reducing effects

Inactive Publication Date: 2012-01-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] To sum up, the shortcomings of the current automatic focusing method for CCD image acquisition are: the purpose of real-time focusing cannot be achieved; and it is difficult to fine-tune the lens to affect the accuracy of focusing; lead to unnecessary waste

Method used

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0029] Such as figure 1 Shown, a kind of real-time auto-focusing method is applicable in the camera device, and this real-time auto-focusing method is in the process of CCD image acquisition, first checks the environment in real time by the focusing environment judging unit of the real-time auto-focusing system to decide whether to move the camera lens; Determines which direction to move the lens by calculating the contrast and making a before and after comparison. The adopted automatic focusing system includes a focusing environment judging unit, and the focusing environment judging unit includes an automatic exposure unit, an automatic white balance unit and other judging devices.

[0030] The method includes the following steps:

[0031] The focusing environment ...

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Abstract

The invention discloses a real-time automatic focusing method, which is suitable for a pick-up device. The real-time automatic focusing method comprises the following steps of: checking an environment in real time by using a focusing environment judging unit of a real-time automatic focusing system to decide whether to move a lens during the image accquiring process of a charge-coupled device (CCD); and comparing by computing contrast to decide the moving direction of the lens. According to the method, the aim of focusing in real time can be fulfilled; the lens can be finely adjusted to increase the focusing accuracy; and moreover, programs are optimized, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of CCD image acquisition of an imaging device, in particular to a real-time auto-focus method. Background technique [0002] With the rapid development of automatic control technology and image processing technology, auto-focus technology has been applied in many fields, such as industrial optical inspection, medical imaging system, multimedia technology and so on. In industrial production, it is often necessary to perform quality inspection on precision instruments, which requires quick and accurate acquisition of clear image information. In this application, autofocus technology plays a crucial role. [0003] Generally, the autofocus method of a microscope using image processing technology is to use natural light to reflect to the convex lens to present the entire inverted image, continuously capture images through the camera, and continuously compare and analyze them, and repeatedly control the moving le...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B13/36G02B7/36
Inventor 程良伦黄加异朱玮王盼盼
Owner GUANGDONG UNIV OF TECH