二维图像三维显示

% 读取图象数据到矩阵
[A, map] = imread('E:\\test.jpg');
% 得到图象信息
info = imfinfo('E:\\test.jpg');
w = info.Width;
h = info.Height;
% 创建与图象大小相对应的网格
[x,y] = meshgrid(1:w,1:h);
z = x - y + y - x;
i = 1;
j = 1;
% 用图象灰度值填充高度值
while (i - 1) * w + j <= w * h
z(i,j) = A(i,j);
j = j + 1;
if j > w
j = 1;
i = i + 1;
end 
end;
% 绘制三维图象
meshc(x,y,z);
% 绘制表面
surf(x,y,z,'FaceColor','interp','EdgeColor','none','FaceLighting','phong')