24 lines
627 B
Matlab
24 lines
627 B
Matlab
function [newS_bar, newV] = mstep_update_shapebasis(P, E_z, E_zz, RR, Tr, S_bar, V)
|
|
%[newS_bar, newV] = mstep_update_shapebasis(P, E_z, E_zz, RR, Tr, S_bar, V)
|
|
|
|
% Computes an improved version of S_bar and V (Eq 21)
|
|
|
|
% E_z is KxT, E_zz is a (F*K)xK matrix
|
|
% V is (3*K)xJ and S_bar is 3xJ
|
|
|
|
K = size(E_z,1);
|
|
[T, J] = size(P); T = T/2;
|
|
|
|
Uc = P(1:T, :) - Tr(:,1)*ones(1,J);
|
|
Vc = P(T+1:2*T, :) - Tr(:,2)*ones(1,J);
|
|
|
|
vecH_hat = computeH(Uc, Vc, E_z, E_zz, RR);
|
|
|
|
H_hat = reshape(vecH_hat, 3*J, K+1);
|
|
|
|
newS_bar = reshape(H_hat(:,1), 3, J);
|
|
newV = zeros(3*K, J);
|
|
for kk=1:K,
|
|
newV((kk-1)*3+[1:3],:) = reshape(H_hat(:,kk+1), 3, J);
|
|
end
|