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A power grid mountain fire potential fire point identification method based on a two-dimensional OTSU

A recognition method and fire point technology, applied in character and pattern recognition, image data processing, instruments, etc., can solve problems such as difficult to meet the timeliness requirements of on-site mountain fire judgment and complex calculation process, and achieve high alarm accuracy and calculation High efficiency and the effect of improving recognition efficiency

Pending Publication Date: 2019-06-18
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology

Patent CN201610568799 still takes the 95th percentile as the mountain fire judgment value based on the threshold value of the pixel point history, the calculation process is complicated, and it is difficult to meet the timeliness requirements for on-site mountain fire judgment

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  • A power grid mountain fire potential fire point identification method based on a two-dimensional OTSU
  • A power grid mountain fire potential fire point identification method based on a two-dimensional OTSU
  • A power grid mountain fire potential fire point identification method based on a two-dimensional OTSU

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] The two-dimensional OTSU-based method for identifying potential fire points of power grid fires in this embodiment includes the following steps:

[0041] (S1) Collect the satellite image of the area to be identified (China area), and obtain the channel brightness temperature characteristic value f(x, y) of each pixel in the satellite image, where x is the longitude value of the pixel point, and y is the pixel point latitude value;

[0042] The channel brightness temperature characteristic value f(x, y) of each pixel is obtained by reading the channel signal value of each pixel in the satellite image file segment, and obtaining the channel brightness temperature characteristic value of each pixel according to the following formula:

[0043] L=(DN-offset)×scales

[0044] Among them, L is the channel brightness temperature chara...

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Abstract

The invention discloses a power grid mountain fire potential fire point identification method based on a two-dimensional OTSU. The method comprises the following steps: firstly, dividing a satellite image data plane into a plurality of rectangular sub-regions according to latitude and longitude; Selecting a sub-region as a to-be-identified region, calculating an average channel brightness temperature characteristic value of pixel points in a neighborhood of each pixel point in the to-be-identified region, and calculating two-dimensional probability distribution of the pixel brightness temperature characteristic values in the to-be-identified region; And obtaining a fire point determination optimization threshold based on a two-dimensional OTSU method, and determining whether each pixel point in the to-be-identified area is a potential fire point according to the optimization threshold. According to the method, the judgment threshold of the potential fire point is calculated only according to the current image; According to the method, the characteristic value distribution information of the whole pixels in the region is fully utilized, the adaptive adjustment of the mountain fire judgment threshold can be carried out according to different time and different regions without the help of historical threshold values, the alarm accuracy is high, the calculation efficiency is high,the practicability is high, and the method plays an important role in maintaining the safety and stability of a power grid and preventing and reducing disasters.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a two-dimensional OTSU-based method for identifying potential fire points of mountain fires in power grids. Background technique [0002] With the continuous expansion of UHV lines and cross-regional power grids in my country, transmission lines often need to pass through mountainous areas and agricultural areas, and the number of wildfires near line corridors continues to increase. After a wildfire occurs, atmospheric conditions such as temperature, density, and humidity will change significantly, greatly reducing the air insulation, and usually last for a long time, making it difficult to successfully reclose the line. [0003] The use of meteorological satellites for mountain fire monitoring has the characteristics of wide monitoring range, timely detection, and low cost. The mountain fire satellite monitoring and identification method includes three main steps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06T7/11
Inventor 陆佳政章国勇李波熊蔚立罗晶周秀冬何立夫
Owner STATE GRID HUNAN ELECTRIC POWER
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