File Exchange

image thumbnail

Resize N-D arrays and images

version 1.3 (6.42 KB) by

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

12 Downloads

Updated

View License

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);
figure,imshow(I),figure,imshow(J),figure,imshow(K)

------
Enter "help resize" to obtain other examples.

Comments and Ratings (3)

Thank you for this. Useful in my work for voxel array sampling for further use with Floyd-Warshall algorithm. Large voxel arrays take obscene quantities of time with Floyd-Warshall, so periodic sampling is useful.

Thank you also for packaging the two required files.

Lili

Lili (view profile)

Nice job! Thanks!!

us

us (view profile)

why do you not put the required functions DCTN and IDCTN into the package as well(?)...

us

Updates

1.3

.

1.2

The functions IDCTN and DCTN are now in RESIZE

1.1

DCTN and IDCTN are now included, as requested

MATLAB Release
MATLAB 7.11 (R2010b)

Download apps, toolboxes, and other File Exchange content using Add-On Explorer in MATLAB.

» Watch video