Inverse of padarray()?

2 次查看（过去 30 天）

jupiter 2016-12-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/315144-inverse-of-padarray

评论： Adam 2016-12-3

I am working on MRI image processing, wherein I work with 3D arrays. To increase the resolution while taking the FFT of the array, I use padarray() and double the size of the image. After the FFT is done, I want to make the size of the resultant array, the same as that of the original array. Is there a way to do it other than looping over and deleting the extra voxels?

For example, if I have 64*64*64 matrix and I increase its size to 128*128*128, and even the resultant will have the same size. I want to change the resultant to a size 64*64*64. To keep it short, is there some kind of inverse padarray?

4 个评论
显示 2更早的评论隐藏 2更早的评论

jupiter 2016-12-3

@Image Analyst, Thanks for the answer. Ok, I am doing * ifftn(fft(x).*fft(y))* . So if I do the zero padding to x and y before taking fft it does not change anything is what you are saying?