清空筛选条件
清空筛选条件

How to calculate spatial frequencies in fft2 of an image

30 次查看（过去 30 天）
Marina
Marina 2014-8-8
评论： Aymane 2024-4-24
I apply fft2 on an image and get amplitudes for each spatial frequency. But what are these frequencies? How can I calculate them, knowing the size of the image in pixels and the dimension of the area in km shown on the image? I need to get these frequencies as cycles per km. Thank you.

请先登录，再回答此问题。

回答（1 个）

Rick Rosson
Rick Rosson 2014-8-9

类别

在 Help Center 和 File Exchange 中查找有关 Fourier Analysis and Filtering 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by