Method for searching visible light image similar to infrared image of electrical equipment
A technology of electrical equipment and infrared images, which is applied in the field of image processing, can solve the problems of high time complexity of the algorithm, and achieve the effects of guaranteed accuracy, good real-time performance, good resistance to scale transformation and anti-rotation transformation
Inactive Publication Date: 2018-03-09
SOUTH CHINA UNIV OF TECH
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However, the time complexity of the algorithm is relatively high, which is about 3 times that of the SURF algorithm.
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[0018] This embodiment provides a method for searching for infrared images of electrical equipment similar to visible light images, the flow chart of the method is as follows figure 1 shown, including the following steps:
[0019] 1) Establish a visible light image library of each electrical equipment in the substation, and provide an infrared image of a certain electrical equipment in the substation;
[0020] 2) Grayscale the visible light image in the visible light image library and the infrared image of the provided electrical equipment to obtain a grayscale image, and use the edge detection algorithm based on the line boundary gray value to analyze the visible light image in the visible light image library and the provided infrared image Edge extraction is performed on the infrared image of the electrical equipment to obtain the corresponding visible light edge image and infrared edge image; wherein the specific steps of the edge detection algorithm based on the line bound...
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The invention discloses a method for searching a visible light image similar to an infrared image of electrical equipment. According to the method, firstly, the edge extraction is conducted on a visible light image in a visible light image library and a provided infrared image based on a line boundary gray-value edge detection algorithm, and then corresponding edge images are obtained. Secondly, according to the SURF operator-based image sensing hash algorithm, the perceptual hash coding operation is conducted on the visible light edge image and the infrared edge image. Thirdly, the hamming distance between the hash code of the infrared edge image and the hash code of the visible light edge image is calculated, and then a visible light edge image set minimum in hamming distance to the hashcode of the infrared edge image is obtained. Finally, images in the visible light edge image set are respectively matched with the infrared edge image based on SURF feature points. Moreover, matchingpoint pairs are screened based on the slope consistency, so that correct matching points are screened out. In this way, a visible light image corresponding to the visible light edge image and most matched with the infrared edge image in matching point is obtained. The obtained visible light image is the searching result of the searching method provided in the invention.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a method for searching for infrared images of electrical equipment similar to visible light images. Background technique [0002] The heating failure of electrical equipment has always been an old problem in the power system, seriously affecting the normal load transportation of power supply equipment, and even causing accidents. Infrared thermal imaging cameras can not only be used for non-contact temperature measurement, but also can display the distribution and changes of the surface temperature of objects in real time, so they are often used to detect heating faults of electrical equipment. Because the infrared thermal imaging camera is less disturbed by factors such as light at night, the staff of the substation often use the infrared thermal imaging camera to check the power equipment at night. The substation staff can roughly determine the location of the thermal...
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IPC IPC(8): G06T7/13G06T7/246G06T9/00
Inventor 张金鹏余翔宇梁辉
Owner SOUTH CHINA UNIV OF TECH