零填充矩阵 [英] zero padding a matrix

问题描述

我有一个16X16的矩阵.我必须将其添加到256X256矩阵中.谁能帮我把16X16矩阵变成256X256并用零填充其余部分?

I have a 16X16 matrix. I have to add it to a 256X256 matrix. Can anyone help me how to make this 16X16 matrix into 256X256 filling the remaining with zeros?

推荐答案

如果您为原始尺寸以外的元素分配内容，Matlab将自动填充零.

Matlab automatically pads with zeros if you assign something to an element outside of the original size.

>> A = rand(16, 16);
>> A(256, 256) = 0;
>> size(A)
ans =
   256   256

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