Detection method of trace complexity of mobile targets of fire video in channel of power transmission line

Abstract

The invention provides a detection method of trace complexity of mobile targets of a fire video in a channel of a power transmission line. Trace complexity of motion of mass center of a moving target is regarded as one of characteristics of fire movement. The detection method comprises steps of obtaining foreground images with the background subtraction method; obtaining difference images after binarization processing, wherein the pixel values of the binaryzation difference image only include 0 and 1; averaging row coordinates and line coordinates of all pixels with pixel value of 1 so as to obtain the coordinate value of the current frame of the mass center of the mobile target; and obtaining movement curves of the mass center of the mobile target after calculation of multi-frame image coordinate values. According to the invention, image-based fire disaster detection technology is adopted, so judgment and detection of fire are achieved; lower rate of false alarm and of missing report of detection results is ensured; and image signals acquired by a camera head is converted into digital signals via an acquisition card and then transmitted into a computer.

Description

technical field [0001] The invention discloses a method for detecting the trajectory complexity of a pyrotechnic video moving target in a channel of a power transmission line, and relates to the field of safety monitoring of a power transmission line. Background technique [0002] External damage to power facilities refers to man-made damage including theft, traffic accidents, and building construction. Statistics have found that a large number of external damages are caused by negligence and deliberation. In the case of external force damage to power facilities, transmission lines are the most frequent and serious power facilities that suffer from external force damage. The flames and smoke generated by the burning of garbage or straw often appear in the transmission line corridor. Therefore, the pyrotechnics in the passage have become the main factors that cause external force damage to the transmission line and threaten the safe operation of the transmission line. [00...

AI Technical Summary

Problems solved by technology

However, the operating environment of transmission lines is complex, and the image background changes greatly. The background of transmission line inspection includes mountains, rivers, farmland, roads, rain and snow, etc., and the appearance of the background will also change with the change of seasons, which makes the identification target extraction very difficult; In the pyrotechnic video detection technology, especially for long-distance and large-scale outdoor pyrotechnic video detection technology, the influence of tree shade and cloud shadow movement on the pyrotechnic detection results is not fully considered, and there are certain false positives or missed negatives in the detection results; based on satellite remote sensing The cost of pyrotechnic detection with particle imaging technology is relatively high, and the practical application of pyrotechnic detection in transmission line channels is greatly limited

In terms of image processing algorithms, the fractal coding smoke detection algorithm proposed by Japanese scholar Nobuyuki et al. uses mapping calculations, lacks real-time performance, and the algorithm is time-consuming; B UgurToreyin uses a method based on wavelet transform to detect video smoke. In the case of smog, the background becomes blurred in the smoke, and the high-frequency energy in the image becomes lower. However, this algorithm has higher requirements on the edge and texture of the background image, and its versatility is affected; Xueming Shu et al. System, particle imaging system, detect smoke by obtaining the particle shape of smoke, but it needs to be realized by hardware, and the cost is high; Khananian A et al. combine neural network and remote sensing images to detect smoke produced by forest fires, which requires the support of satellite remote sensing, and the same Lack of economy

Images