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Power transmission line aerial photographing image splicing method

A technology for aerial imagery and power transmission lines, applied in image data processing, graphics and image conversion, instruments, etc., can solve time-consuming and time-consuming problems

Inactive Publication Date: 2015-12-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feature descriptors of SIFT and SURF are high-dimensional vectors, which are time-consuming for distance-based feature matching
However, the resolution of aerial images is relatively high, so the SURF method usually used will be more time-consuming.

Method used

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  • Power transmission line aerial photographing image splicing method
  • Power transmission line aerial photographing image splicing method
  • Power transmission line aerial photographing image splicing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] figure 1 It is a flow chart of the method for splicing aerial images of power transmission lines according to the present invention. Such as figure 1 As shown, the specific steps of the power transmission line aerial image stitching method of the present invention include:

[0067] S101: Obtain the aerial image sequence of the power transmission line:

[0068] The N transmission line aerial images that need to be spliced ​​are sorted according to the shooting time, either in forward or reverse order, and the transmission line aerial image sequence is obtained.

[0069] Obtain the image sequence I=(I 1 , I 2 ,...,I N ), remember image I i and I j The transformation relationship between is H ij , the value range of i and j is 1≤i≠j≤N. Since the sequence images generally only have overlapping relations between adjacent images, only the adjacent images need to be registered, and there is no need to perform registration between all images, which greatly reduces the ...

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Abstract

The invention discloses a power transmission line aerial photographing image splicing method. Firstly power transmission line aerial photographing image sequences are obtained; the images are preprocessed and then ORB characteristics are obtained through extraction; then fusion is performed in order; the spliced image Fn of the previous n images and an image In+1 are spliced; feature point matching is performed on a feature point descriptor set Pn and an image In+1 feature point descriptor set Qn+1 in splicing; then a transformation matrix of coordinate space from the spliced image Fn to the image In+1 is obtained according to the feature point matching pairs, and fusion weight is obtained according to distance of each pixel point to one side of an image In' and the image In+1 arranged in the overlapped area; and weight fusion is performed according to the fusion weight when the pixel points in the spliced image Fn+1 have corresponding effective pixel points in the spliced image Fn and the image In+1. The power transmission line aerial photographing image splicing method is simple and effective so that power transmission line aerial photographing image splicing can be rapidly and accurately realized.

Description

technical field [0001] The invention belongs to the technical field of image splicing, and more specifically, relates to an aerial image splicing method of power transmission lines. Background technique [0002] my country's power grids, especially high-voltage power grids, are generally distributed widely and have long transmission distances. Many of them are located in sparsely populated areas, especially plateau mountainous areas, which brings difficulties to the monitoring of the power grid. If manual regular inspections are completely used, the workload will be very heavy, and it will be difficult to achieve all-weather and wide coverage. The use of drone inspections can easily reach places that are difficult to cover manually, and transmit the images of the transmission lines back to the control center. The image information is analyzed to obtain the shelter of trees around the transmission line, the sag of the transmission line, snow, ice, foreign objects on the line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
CPCG06T3/4038
Inventor 邹见效周雪何建徐红兵姜鹏飞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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