updownsample

Version 1.0.0.0 (3,1 ko) par Ohad Gal
up/down sample an input matrix using the fourier domain.
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Mise à jour 22 nov. 2004

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Up/down sample an image/matrix/vector (can be of complex numbers) using the frequency domain.
The matrix/vector should be continuous of a high degree (has continuous derivatives) in order to obtain a reasonable up/down sampling

Speed-up can be achieved if the user up-samples to a near power of 2. no optimization is done inside this code for efficient fft usage.

Documentation is found inside the *.m file.

type "updownsample" for the example

Citation pour cette source

Ohad Gal (2026). updownsample (https://fr.mathworks.com/matlabcentral/fileexchange/4658-updownsample), MATLAB Central File Exchange. Extrait(e) le .

Compatibilité avec les versions de MATLAB
Créé avec R12.1
Compatible avec toutes les versions
Plateformes compatibles
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Remerciements

Inspiré par : fft_upsample

Version Publié le Notes de version
1.0.0.0

I found a linear phase distortion in the output image (only when looking at a complex or real output image), due to spatial misplace of the input image in the fourier domain