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Insulator image segmentation method based on distance transform and marker watershed algorithm

A technology of marking watershed and watershed algorithm, which is applied in image analysis, image enhancement, image data processing, etc., can solve the problem of high segmentation error rate, alleviate noise interference, improve efficiency and accuracy, and overcome weak adaptability Effect

Active Publication Date: 2018-12-11
MAINTENANCE BRANCH COMPANY STATE GRID ZHEJIANG ELECTRIC POWER +1
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Problems solved by technology

The background of infrared images may contain interference factors such as steel frames, towers, wires, and clouds. The original threshold segmentation method and target area extraction method in batch processing are no longer universal, resulting in a high segmentation error rate

Method used

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  • Insulator image segmentation method based on distance transform and marker watershed algorithm
  • Insulator image segmentation method based on distance transform and marker watershed algorithm
  • Insulator image segmentation method based on distance transform and marker watershed algorithm

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Embodiment

[0078] The insulator string of a 220kV transmission line is detected by the online detection method of disk-shaped suspension porcelain insulators based on infrared thermal imaging. Each string of insulators contains 14 insulators with the same model parameters. The specific process of image segmentation is as follows:

[0079] (1) Collect the infrared thermal image spectrum of the insulator string to be segmented, as shown in Fig. 3(a).

[0080] (2) Using the algorithm based on distance transformation and marking watershed to initially extract the insulator string area in the map and mark it, see Figure 3(b).

[0081] (3) Further extract the iron cap and disk area corresponding to each insulator, see Figure 3(c).

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Abstract

An insulator image segmentation method based on distance transformation and a marker watershed algorithm relates to an insulator infrared image segmentation method. A conventional threshold segmentation method has a high error rate and is not suitable for image segmentation of insulators. The method includes: a watershed algorithm is adopted for image segmentation after preprocessing operation; Euclidean distance transform is performed on that complemented binary image, each pixel is assigned a distance from its nearest background pixel, the processed image is inverted and the local minimum value of the string region is found as a mark, and the region between two adjacent marks is taken as the insulator piece division line, so that only a unique internal mark and a partial background are ensured in each region, and the insulator piece region is effectively prevented from being separated by over-segmentation. The technical scheme is simple and convenient to realize. At the same time, the method adopting marker control and distance transform is used to effectively alleviate noise interference, prevent the image from being over-segmented into many tiny regions, and significantly improve the efficiency and accuracy of image segmentation.

Description

technical field [0001] The invention relates to an insulator infrared image segmentation method, in particular to an insulator image segmentation method based on distance transformation and marking watershed algorithm. Background technique [0002] Insulators are important insulating components in power grids and are key components to ensure electrical performance. To increase the creepage distance, it is usually made of glass or ceramic. Its function is to suspend the wire and keep the wire insulated from the tower and the earth. Therefore, insulators in actual operation must not only bear the effects of working voltage and overvoltage, but also bear the vertical load, horizontal load and tension of the wire, and must have good insulation performance and sufficient mechanical properties. At present, porcelain disc insulators are mainly used in transmission lines and substations in my country. Due to long-term exposure to harsh natural environments such as line electromec...

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Application Information

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IPC IPC(8): G06T7/11G06T7/136
CPCG06T7/11G06T7/136G06T2207/10048G06T2207/20152
Inventor 徐嘉龙李凯迪胡俊华罗世栋李伟勇周阳洋刘正庭石雷宋亮宇林国士张德保吴金祥胡振宇李明黄巍吴桂华李斌帅姚建刚尹骏刚朱向前钱珏臻张利民程泳沈立荣
Owner MAINTENANCE BRANCH COMPANY STATE GRID ZHEJIANG ELECTRIC POWER