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