Bidirectional concatenation using cat (image zero-padding)

Question

Sordin 2017-4-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/335753-bidirectional-concatenation-using-cat-image-zero-padding

回答： Jan 2017-4-17

I am trying to zero-pad the borders of an image by a certain amount (xPad, yPad) using the cat function. It takes four lines of code to achieve this. For instance, for the padding in the y direction I have:

[x, y] = size(Image);
padI = cat(2, Image, zeros(x,yPad));
padI = cat(2, zeros(x,yPad),padI);

Is it possible to concatenate in both directions similataneously using a single line of code (i.e., using cat only once)?

Any suggestions are greatly appreciated.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2017-4-17

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/335753-bidirectional-concatenation-using-cat-image-zero-padding#answer_263345

在 MATLAB Online 中打开

You could write a function for this purpose:

function ImgP = ImagePad(Img, xPad, yPad)
siz  = size(Img);
ImgP = zeros(siz + 2 * [XPad, YPad], class(Img));
ImgP(XPad + 1:XPad + siz(1), YPad + 1:YPad + siz(2)) = Img;