Method and system for extracting laser welding penetration curve according to OCT point cloud

The invention discloses a method and system for extracting a laser welding fusion depth curve according to OCT point cloud.The method comprises the steps that the mean value of reference light is removed from interference signals, new interference signals are obtained, non-uniform inverse Fourier transform is conducted on the new interference signals, two-dimensional point clouds containing fusion depth information are extracted, and the fusion depth curve is obtained; carrying out peak denoising on the fusion depth information and extracting peak scatter points; grid division is carried out on the range of the two-dimensional point cloud to generate a plurality of grid areas, the noise probability of each grid area is calculated through standardized poisson distribution, if the noise probability corresponding to a certain grid area is larger than or equal to a preset noise threshold value, the certain grid area is defined as a noise area, all peak scatter points in the noise area are deleted, and the noise p