Rapid lens flaw detection method and apparatus thereof

A detection method and detection device technology, which is applied in the field of lens cleaning, can solve problems such as low efficiency and no small scratches can be detected, and achieve the effects of improving accuracy, objective detection results, and fast speed

Inactive Publication Date: 2012-10-17
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] Aiming at the defects of the prior art, the purpose of the present invention is to provide a rapid detection method for lens defects, which aims to solve the problem of low efficiency and no detection of small scratches caused by human eye detection in the prior art

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  • Rapid lens flaw detection method and apparatus thereof
  • Rapid lens flaw detection method and apparatus thereof
  • Rapid lens flaw detection method and apparatus thereof

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] With the advancement of electronic technology, the software and hardware technologies of machine vision systems have achieved rapid development. Cameras with large resolution and high scanning speed and image acquisition cards with high-speed transmission capabilities meet the needs of high-speed, high-precision image acquisition for products; high-performance computers and other processing equipment provide hardware support for image processing with large amounts of data ; The success of image processing theory and algorithm research provides an agile "brain" for the visual system. Mathema...

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Abstract

The invention discloses a rapid lens flaw detection method and an apparatus thereof. The method comprises the following steps: equally dividing the surface of a lens to be detected into n<2> parts, respectively obtaining the images of all the parts, and obtaining n<2> images within a preset time which is used for controlling the image obtaining rate; 2, carrying out median filtering, black hat transformation and binary processing on the n<2> images respectively, and partitioning off defective images; 3, carrying out opening operation on the defective images to filter out non-flaw interference parts; and 4, drawing contours of the defective images subjected to non-defective interference filter, there are flaws on the surface of the lens to be detected if there is a counter, and no flaws are on the surface of the lens to be detected if there is no counter. The rapid lens flaw detection method provided in the invention allows scratches on the lens to be clearly detected through a surface defect detection method based on the mathematical morphology under the high speed motion of a platform, and defect types to be effectively discriminated, and has the characteristics of fast speed, objective detection result and the like.

Description

technical field [0001] The invention belongs to the field of lens cleaning, and more particularly relates to a method and device for quickly detecting lens defects. Background technique [0002] In recent years, with the rapid development of the communication industry, mobile phones have become a necessity in our lives. Many mobile phone manufacturers want to produce high-quality mobile phones to satisfy consumers. They strictly control every process of mobile phone production. Clean and scratch-free mobile phone lenses are the most basic requirement. How to detect whether the cleaned mobile phone lens is clean or not? In the beginning, the staff checks with the naked eye. For example, in printing production, the production line has been running tens of meters, or even hundreds of meters, from the time when the human eye finds a defect to responding. , which causes a huge waste of paper and ink. Thirdly, the traditional human eye detection method is not sensitive to the de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/896
Inventor 岳东陆凯孙志刚许祖鑫
Owner HUAZHONG UNIV OF SCI & TECH
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