i have done 2d dft for image without using function(fft2) and received dft image.now i have to get magnitude and phase image of dft image.help me..

1 次查看（过去 30 天）
saroram r
saroram r 2013-12-30
回答： Walter Roberson 2013-12-30
how can i get separated magnitude and phase image..i have done 2d dft without using built-in function.

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2013-12-30
magnitude image is abs() of the dft, plotted as an image. phase image is angle() of the dft, plotted as an image.
Remember that dft may have a large component for the first entry, representing the total offset from 0 (sum() of the signal). This tends to swamp everything else, and you need to decide how you are going to deal with it. You can use imshow(TheArray,[]) or imagesc(TheArray) but you might not get much readable in most of the image.

类别

在 Help Center 和 File Exchange 中查找有关 Images 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