【讨论】三维图像生成

[herzy_huang]

有这样一个程序：
clc
for i=1:2
n=strcat(num2str(i-1),'1111.tif');
[x,m]=imread(n);
D(:,:,i)=x;
end;
[x y z D]=reducevolume(D,[3 3 1]);
D=smooth3(D,'gaussian');
fv=isosurface(x,y,z,D,'noshare');
p1=patch(fv,'FaceColor','green','EdgeColor','none');
isonormals(x,y,z,D,p1);
fvc=isocaps(x,y,z,D,'noshare');
p=patch(fvc,'FaceColor','green','EdgeColor','none');
view(3); axis tight; daspect([1,1,0.4])
colormap(gray(100))
camlight left; camlight; lighting gouraud

出现了：
??? Subscripted assignment dimension mismatch.

Error in ==> three at 5
D(:,:,i)=x;

这一行是把X放到D的第i层，但是实现不了，请问怎么错了？