1. A method for determining a correspondence between a first set of data and a second set of data, representing a first brain and a second brain, respectively, comprising: a processor creating a first mesh from the first set of data and a second mesh from the second set of data; the processor determining a Laplacian matrix for a weighted graph representing a mesh; determining by eigendecomposition a first and a second spectrum related to the first and second mesh; assigning to each node in each mesh a coordinate based on one or more spectral components of the related spectrum; assigning to each node in each mesh an additional coordinate based on a quantified feature of the node; aligning the reordered first and second spectrum to determine a correspondence between the first and second mesh.