Large-scene binocular range finding and correction method in overhead power transmission channel image monitoring

Abstract

The disclosure relates to a large-scene binocular range finding and correction method in overhead power transmission channel image monitoring. The method comprises the following steps: (1) calibratinga binocular camera by using a calibration rod method in a long-distance large-scene field view condition; (2) scaling down an image to correct a calibrated focal length parameter in order to reduce afocal length difference between two cameras; and (3) searching out an optimal rotation angle of a three-dimensional coordinate system by using a quasi-Newton method so that a camera coordinate systemcoincides with a ground coordinate system as much as possible. The method can solve the calibrating difficulty of a traditional binocular range finding technology in an overhead line channel large scene, and reduces a calibrated focal length difference by scaling down the image, can solve the focal length difference due to the limitations of the camera setting itself and the mechanical precision,provides the algorithm for searching out the optimal rotation angle of the three-dimensional reconstructed coordinate system by using the quasi-Newton method, and can solve the unclear or obscured boundary textures at the bottom of an object.

Description

technical field [0001] The invention belongs to the field of imaging, and in particular relates to a binocular ranging method for a large scene in image monitoring of an overhead power transmission channel and a correction method thereof. Background technique [0002] Electricity plays a vital role in today's rapidly developing society. High-voltage overhead lines are an indispensable part of electric power production, and their safety cannot be ignored. In recent years, the operating environment of transmission lines has become increasingly complex. With the rapid development of scale, the contradiction between overhead transmission lines and economic activities has become increasingly prominent. Accidents such as crane collisions and illegal constructions that cause transmission line outages are common and have become an impact. The main factor for the safe and stable operation of high-voltage lines seriously threatens the operation safety of the power grid and even causes...

AI Technical Summary

Problems solved by technology

In practical applications, the camera device is generally erected on the tower, and the height of the binocular camera is relatively high, and the distance between the cameras is relatively long. It is difficult to carry out calibration work in the laboratory or outdoors.

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