Introduction - If you have any usage issues, please Google them yourself
(L) proposed a free-form deformation based on least squares of the grid technology. The least square grid as the original low-resolution mesh grid, the difference between the two high frequency frames with local codes, to maintain the mesh of the surface geometry details of the purpose. The basic idea is to use grid algorithm is free-form deformation techniques (mean coordinates) to control low-resolution least-squares grid, rather than direct control of the original mesh and then re-encoded frame by local deformation of the grid.