清空筛选条件
清空筛选条件

using imresize in the fourier domain

1 次查看（过去 30 天）
raheem mian
raheem mian 2020-2-12
回答： Farhath Fatima 2020-2-12
x = rand(200,200);
y = imresize(x,2);
v1 = fftn(y);
v = fftn(x);
v2 = imresize(v,1/2) ./ 2;
My question is would v1 and v2 be the same matrix ? or am I using the fourier scaling theorem incorrectly ?

请先登录，再回答此问题。

回答（1 个）

Farhath Fatima
Farhath Fatima 2020-2-12
Hi Raheem,
As per understanding, v1 and v2 would not be same matrix. First the sizes of both the matrices are not same. Size of v1 is 400*400 and size of v2 is 100*100.
v1 is obtained from y, which inturn is scaled to twice of size of x.
v2 is obtained from scaling v to ½ its size, which inturn is obtained from fourier of x.
First Scaling has to be proper to compare any two matrices.

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息

标签

产品


版本

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by