Non-rigid three-dimensional shape description method and device, storage medium and equipment

The invention provides a non-rigid three-dimensional shape description method and device, a storage medium and equipment. The method comprises the following steps: constructing a target spectrum shape descriptor based on a BKS scale feature function and a feature value vector; determining a Gaussian curvature function representing the curved surface bending degree of any vertex on the surface of the target shape model; for the shape to be matched, constructing a feature fusion descriptor based on a target spectrum shape descriptor and a Gaussian curvature function; performing standardization processing on original variables in the feature fusion descriptors to obtain target feature fusion descriptors; and performing shape feature description on the target shape model by using the target feature fusion descriptor to obtain model feature data. Therefore, the IBKS descriptor is established on the basis of a biharmonic kernel signature, inherits the stability of a shape hinge structure region, ensures the descrip