%-------------------------------------------------------------------------------
% UF Sparse Matrix Collection, Tim Davis
% http://www.cise.ufl.edu/research/sparse/matrices/Yoshiyasu/mesh_deform
% name: Yoshiyasu/mesh_deform
% [image mesh deformation problem, Y. Yoshiyasu, Keio Univ, Japan]
% id: 2249
% date: 2009
% author: Y Yoshiyasu
% ed: T. Davis
% fields: name title A id date author ed kind b notes aux
% aux: D
% kind: computer graphics/vision problem
%-------------------------------------------------------------------------------
% notes:
% This problem one is template deformation using the vector field from the   
% Yoshiyasu/image_interp problem, solved with v=(A2'*D*A2)/(A2'*D*b2), where 
% D is a diagonal matrix containing weights.  Structures of A2 and b2 are a  
% little bit more complex than A1 and b1 (in the image_interp problem), but  
% they are similar.  Both systems are not very time-consuming themselves, but
% this process iterates more than 10 times for 10 views.  [Note by T. Davis: 
% since C is of high rank, update/downdate will not be effective, since it is
% meant for low-rank changes.]                                               
%-------------------------------------------------------------------------------
