Discrete Poisson solver Discretize min JJVf-vll directly by Discretized gradient min∑(f-f6-Vm),=后,vp∈a2 <p,q>∩≠0 Discretized v: g(p)-g(q all pairs that are in Q2) p=Vpe9ha=(p∈S:Nm9≠0o O/oO for neighbors p and g with p+qy cc可视计算研究中心• Discretize directly by : • for neighbors p and q with Discrete Poisson Solver 18    -v 2 min f f =      − −  p p p p q p q pq f min f f v , f f , * , 0 2 ( ) f  = { fp, p}; = {p S \ : NP   0} pq p q vpq V • + = ) 2 ( Discretized v: g(p)-g(q) all pairs that are in Ω) Discretized gradient