matlab-动图

matlab中的gif动图

% 彩色图像，举个例子，n个图片
% 对于实际图形，常用到frame = getframe(fig);im(idx)=frame2im(frame);
n = 100;
for i = 1:n
    img{i} = im2uint8(rand(512,512,3));
end
% 将图片组合成gif图
filename = 'test_rgb.gif';
for idx = 1:n
    [A, map] = rgb2ind(img{idx},256); % RGB图像转化为索引图像，A是索引，map是颜色图
    if idx == 1
        imwrite(A, map, filename,'gif','LoopCount',Inf,'DelayTime',1/25);
        % LoopCount=Inf,动画连续循环；DelayTime表示每张图片之间的延迟
    else
        imwrite(A, map, filename,'gif','WriteMode','append','DelayTime',1/25);
    end
end

　　灰色图像gif动图则不需要求颜色图

for idx = 1:n
    if idx == 1
        imwrite(img{idx},filename,'gif','LoopCount',Inf,'DelayTime',1/25);
    else
        imwrite(img{idx},filename,'gif','WriteMode','append','DelayTime',1/25);
    end
end