what is Frequency in a image

3 次查看（过去 30 天）
Gova ReDDy
Gova ReDDy 2011-12-20
Applying fourier transform to a image will convert it into frequency domain and the complex values are obtained. Can anyone explain... what does the frequency in a image represent or what does the frequency in a image means.

请先登录，再回答此问题。

回答（3 个）

David Young
David Young 2011-12-20
Walter Roberson
Walter Roberson 2011-12-20
For the first half of the fft results, fft bin index N corresponds to a pattern that occurs (N-1) times across the signal, with bin index 1 corresponding to a constant offset.
So for frequency in an image, substitute the word "image" for "signal" in the above.
Image Analyst
Image Analyst 2011-12-20
  2 个评论
Gova ReDDy
Gova ReDDy 2011-12-21
Thanks.....
How to select the cutoff frequency of the high pass filter for extracting frequencies of the line contained in this image i.e., the high frequencies
http://tinypic.com/view.php?pic=2yxr9lv&s=5
Image Analyst
Image Analyst 2011-12-21
I'm done with that. We've been over this in countless postings and you know my feelings on it already. You keep trying wrong approaches with a new angle in each new posting. Sorry, but I'm finished discussing that.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Discrete Fourier and Cosine Transforms 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by