Effacer les filtres
Effacer les filtres

how to find Windowed Fourier Transform of an image? If possible function script is needed.

1 vue (au cours des 30 derniers jours)
Windowed fourier transform of an image is required. Is it same as STFT? Script for that is required. Thank you.

Réponse acceptée

Spandan Tiwari
Spandan Tiwari le 8 Fév 2014
STFT computation requires computing Fourier Transform of sub-blocks of the image. You can use fft2() to get Fourier Transform. For breaking the image in overlapping or non-overlapping blocks and processing each block, look at the function blockproc() in the Image Processing Toolboxs It can take care of dividing the image into sub-blocks and putting the output back together after computation.
  2 commentaires
ruchitesh le 8 Fév 2014
Thank you very much Mr.Tiwari. It would be very helpful if you can guide little more. Actually section of the WFT(circular window with r=16) at 10x10 location is required. can you tell me how to implement this?
Spandan Tiwari
Spandan Tiwari le 10 Fév 2014
From your question it sounds as if you are trying to find a Windowed FT around just one pixel ((10,10)? ). Is that correct? Or are you trying to find STFT for the entire image,going block-by-block? If its the former it is much easier.

Connectez-vous pour commenter.

Plus de réponses (0)


En savoir plus sur Continuous Wavelet Transforms dans Help Center et File Exchange


Community Treasure Hunt

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

Start Hunting!

Translated by