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

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Windowed fourier transform of an image is required. Is it same as STFT? Script for that is required. Thank you.

Accepted Answer

Spandan Tiwari
Spandan Tiwari on 8 Feb 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.
Spandan Tiwari
Spandan Tiwari on 10 Feb 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.

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