Aerodynamic optical thermal radiation effect correction method and device based on NURBS curved surface fitting

The invention relates to a pneumatic optical thermal radiation effect correction method and device based on NURBS curved surface fitting. The method comprises the following steps: acquiring a degraded image of a pneumatic thermal radiation effect; filtering high-frequency components in the degraded image by adopting a Gaussian pyramid to obtain a Gaussian pyramid top image; extracting the pixel points in the Gaussian pyramid top layer image as fitting pixel points of the NURBS curved surface; respectively calculating node vectors of the fitting pixel points in the row direction and the column direction, and constructing a basis function matrix of the NURBS curved surface by using the node vectors in the row direction and the column direction; calculating a control point vector of the NURBS curved surface based on an NURBS curved surface inverse algorithm, and performing curved surface correction according to the control point vector to obtain a new weight factor of the NURBS curved surface; establishing a the