The invention discloses a three-dimensional dynamic
reconstruction method for a long-gap
discharge channel, and the method comprises the steps: collecting a multi-view synchronous
image sequence of a
discharge process through at least two cameras which are disposed on the same plane and are synchronously triggered, carrying out the graying, binaryzation and time correction
processing of a synchronous image group at each time point, and carrying out the calculation of the multi-view synchronous
image sequence. Obtaining a binarized image with
time alignment; performing
visual angle correction on the image, and extracting
discharge channel edge points line by line in the corrected image to form an edge
point set; then, constructing an overdetermined equation set by utilizing the edge
point set based on epipolar constraint, and solving through
singular value decomposition to obtain a three-dimensional space coordinate set; and finally, generating a three-dimensional
static model of a single time point by calculating central points and radiuses of sections with different heights, and combining the static models of continuous time points in sequence to finally reconstruct a three-dimensional dynamic model of the discharge channel. According to the method, high-precision and high-efficiency three-dimensional dynamic reduction of the transient evolution process of the discharge channel is realized.