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Solar panel crack detection method

A technology of a solar panel and a detection method, applied in the field of image processing, can solve problems such as affecting crack detection, and achieve the effect of avoiding mutual interference

Inactive Publication Date: 2012-01-11
HANVON CORP
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  • Application Information

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Problems solved by technology

These noises have similar characteristics to cracks from a local point of view, which seriously affects the detection of cracks

Method used

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  • Solar panel crack detection method
  • Solar panel crack detection method
  • Solar panel crack detection method

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Embodiment Construction

[0026] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The invention adopts a machine vision detection scheme, decomposes the solar panel crack detection problem into several image processing and pattern recognition modules to solve it, comprehensively uses a variety of image processing methods, and perfectly completes the task of solar panel crack detection. First, the crack characteristics are enhanced by a well-designed preprocessing module. Then, according to the difference between the cracks and the normal texture characterization, brightness and edge characteristics of the solar panels, we specially designed feature extraction algorithms and feature evaluation algorithms to complete the detection and location of the cracks. It solves the problem of quickly and a...

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Abstract

The invention relates to a solar panel crack detection method, belonging to the field of image processing. The solar panel crack detection method comprises: 1, initializing a panel image; 2, dividing the initialized panel image into image blocks with the fixed size, calculating the main direction of each image block, and extracting an area with a possible crack as a candidate image block; 3, carrying out directional hough transformation for the main direction of the candidate image block to obtain the accurate position and direction of a candidate crack; and 4, analyzing and evaluating the positions and directions of the candidate cracks of adjacent image blocks, and determining the cracks. The strategy of multi-scale visual search can be achieved. The segment HOUGH transformation is utilized flexibly for local crack searching, interference of different traces in the image can be avoided, and panel crack detection is completed via integration of results of the segment HOUGH transformation based on evaluation of crack states.

Description

Technical field [0001] The invention belongs to the field of image processing, and relates to a target search algorithm, in particular to a crack detection method for battery panel images. Background technique [0002] Solar panel crack detection technology is a type of surface defect detection technology. Surface defect detection technology is developing rapidly abroad, and its applications are in various fields. In terms of subdivision, surface defect detection technology includes a variety of different technologies: laser surface defect detection, ultrasonic surface defect technology, infrared defect detection technology and machine vision-based defect detection technology. [0003] Different from traditional surface defect detection technology, the defect detection technology of solar panels has the characteristics of small cracks (micron level), indefinite crack direction and strong surface reflectivity (coating). Laser surface inspection technology, ultrasonic surface inspe...

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Application Information

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IPC IPC(8): G01N21/88G06K9/62G06T5/00
Inventor 谢杰成张栋晏阳张蓬胡波
Owner HANVON CORP