Question

我试图在MATLAB上实现主动外观模型的光度标准化步骤，如此处所述http://www2.imm.dtu.dk/~aam/main/node13.html#SECTION04350000000000000000

我的代码如下：

function g=AAM_NormalizeAppearance3D(gim_mat)

n_texs = size(gim_mat,1); % Number of array elements
s = size(gim_mat,2); % Number of textures

mean_tex = gim_mat(:,1); % First mean texture is considered to be the first one in the set

tex_error = 1;

oneloop = false;

while tex_error > 0.001 % Convergence criteria

    mean_tex = mean_tex - mean(mean_tex); % Standardize mean texture
    sig = sqrt(sum(mean_tex.^2)/n_texs);
    mean_tex = mean_tex/sig;

    if oneloop % prev_mean_tex is still not defined in first iteration
        tex_error = sum(abs((prev_mean_tex - mean_tex)));
    end

    for i=1:s
        alpha = dot(gim_mat(:,i), mean_tex);
        beta = mean(gim_mat(:,i)); 

        gim_mat(:,i) = (gim_mat(:,i) - beta)/ alpha; % Normalized texture vector
    end

    prev_mean_tex = mean_tex; % Store previous mean texture
    mean_tex = mean(gim_mat,2); % New mean texture

    oneloop = true;
end

g = gim_mat;

现在，我不知道我是否解释了我从中得到的结果或者代码中是否有任何错误，但我得到的标准化纹理值非常小。也就是说，对于值范围从0到1的输入纹理矢量，我得到具有10 ^ -5数量级的最大值的归一化矢量。难道这不会收敛到更高的值吗？

主动外观模型纹理规范化

0 个答案: