Binocular ranging and its correction method for large scenes in image monitoring of overhead power transmission channels

Abstract

The present disclosure relates to a large-scene binocular ranging and correction method in image monitoring of an overhead power transmission channel, including: (1) using a calibration rod method to calibrate the binocular camera in a long-distance large-scene field of view; (2) zooming The focal length parameter calibrated by the image is corrected to reduce the focal length difference between the two cameras; (3) The quasi-Newton method is used to optimize the rotation angle of the three-dimensional coordinate system, so that the camera coordinate system and the ground coordinate system coincide as much as possible. This disclosure can solve the problem that the traditional binocular distance measurement technology is difficult to calibrate in the large scene of the overhead line channel; the zoom of the image scale can be used to reduce the focal length difference of the calibration, and it can solve the focal length difference caused by the limitation of the camera itself and the left mechanical precision problem; an algorithm for optimizing the rotation angle of the coordinate system after 3D reconstruction using the quasi-Newton method is proposed, which can solve the problem of unclear or occluded border textures at the bottom of the object close to the ground.

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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