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Method for detecting surface pattern

A detection method and pattern technology, applied in the field of optical detection, to eliminate the influence of human subjective consciousness, reduce shipping costs, and avoid misjudgment or over-judgment

Inactive Publication Date: 2013-09-18
致茂电子(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore in order to solve the above problems, the main purpose of the present invention is to provide a method for detecting surface patterns, which can automatically determine the unevenness of the surface patterns of the object to be tested, so as to improve the shortcomings of the traditional manual visual inspection method.

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0031] A surface pattern detection method provided by the present invention is to capture the surface image of the object to be tested, analyze the image characteristics of the gray scale data, and judge whether the surface of the object to be tested has flaws. However, since the implementation of the present invention is too numerous to enumerate, the detection method of the surface pattern provided by the present invention can be implemented in various forms, so it will not be described here one by one, and only the preferred embodiments will be listed. Be specific.

[0032] see figure 2 , image 3 and Figure 4 , figure 2 It is a flow chart of the detection method of the surface pattern of the preferred embodiment of the present invention, image 3 is a schematic diagram of the grayscale image of the surface of the o...

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Abstract

The invention relates to a method for detecting a surface pattern. The method comprises the following steps of: firstly, retrieving a gray-scale image with N pixels from a surface of an object to be detected, wherein N is a positive integer; then selecting f*N pixels with small gray-scale values and defining the pixels as a foreground region according to a screening ratio f, and calculating an average foreground value according to the number of pixels in the foreground region and the gray-scale values; selecting f*N pixels with large gray-scale values and defining the pixels as a background region, and calculating an average background value according to the number of pixels in the background region and the gray-scale values; and finally judging whether flaws exists in the surface of the object to be detected or not according to the average foreground value and the average background value.

Description

technical field [0001] The invention relates to an optical detection method, and in particular to a detection method for surface patterns. Background technique [0002] In the production of a large number of industrial products, how to pursue higher product quality and improve the uniformity of the produced products has always been the focus of attention. Therefore, in addition to improving the production process of the product, it is necessary to improve the quality of the produced product. Testing is carried out to meet customers' requirements for product quality, and among them, whether the appearance of the product is intact or not is the most intuitive testing item during product production. [0003] However, in many production fields, limited by the nature of its materials, after the completion of the production, it is easy to form various lines or spot patterns on the surface. Although most of the patterns have little effect on product performance, in terms of its app...

Claims

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Application Information

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IPC IPC(8): G01N21/956
Inventor 郑文玮薛名凯罗文期
Owner 致茂电子(苏州)有限公司