Resize N-D arrays and images

Y = RESIZE(X,newsize) resizes input array X using a discrete cosine transform.


Updated 12 Oct 2014

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Y = RESIZE(X,NEWSIZE) resizes input array X using a DCT (discrete cosine transform) method. X can be any array of any size. Output Y is of size NEWSIZE.
Input and output formats: Y has the same class as X.
As an example, if you want to multiply the size of an RGB image by a factor N, use the following syntax:
newsize = size(I).*[N N 1];
J = resize(I,newsize);

% Upsample and stretch an RGB image
I = imread('onion.png');
sizeJ = size(I).*[2 2 1];
J = resize(I,sizeJ);
sizeK = size(I).*[1/2 2 1];
K = resize(I,sizeK);

Enter "help resize" to obtain other examples.

Cite As

Damien Garcia (2023). Resize N-D arrays and images (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes


The functions IDCTN and DCTN are now in RESIZE

DCTN and IDCTN are now included, as requested