Three-dimensional flow field reconstruction method based on slice type optical measurement image

The invention discloses a three-dimensional flow field reconstruction method based on a slice-type optical measurement image, and the method comprises the steps: carrying out the slicing of a supersonic flow field in the width direction, and obtaining a plurality of two-dimensional flow field images on each slice section based on an NPLS technology; performing time-averaging processing on the two-dimensional flow field image obtained by each slice section to obtain a two-dimensional time-averaging flow field image corresponding to each slice section, and performing filtering processing on each two-dimensional time-averaging flow field image; performing edge extraction on the two-dimensional time-averaging flow field image to obtain an edge extraction image corresponding to each slice section; and fitting the edge extraction image of each slice section, and generating curved surface point cloud data of the flow field based on an edge fitting curve to complete three-dimensional flow field reconstruction. The me