Fast mutual information of two images or signals

Version 1.6 (2,26 ko) par Jose Delpiano
Optimized function for mutual information of two images or signals
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16,2K téléchargements
Mise à jour 23 fév. 2015

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Usage: I=mi(A,B), where A and B are equally sized images/signals.
Function hist2 (included) is used to determine the joint histogram of the images/signals.

Assumptions: 1) 0*log(0)=0, 2) mutual information is obtained on the intersection between the supports of partial histograms.

Example (in mi_test.m):

disp('Test: Mutual information between two images')
load mri
A=D(:,:,8);
B=D(:,:,9);
mi(A,B)

disp('Test: Mutual information between two signals')
load garchdata
nasdaq = price2ret(NASDAQ);
nyse = price2ret(NYSE);
mi(nasdaq,nyse)

Citation pour cette source

Jose Delpiano (2024). Fast mutual information of two images or signals (https://www.mathworks.com/matlabcentral/fileexchange/13289-fast-mutual-information-of-two-images-or-signals), MATLAB Central File Exchange. Récupéré le .

Compatibilité avec les versions de MATLAB
Créé avec R2008b
Compatible avec toutes les versions
Plateformes compatibles
Windows macOS Linux
Remerciements

A inspiré : Image mutual information, image_MI.m

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Version Publié le Notes de version
1.6

Available as toolbox
1.5.0.0

Speed improvements suggested in comments by Andrew Hill.
1.1.0.0

Added support for signals (1D matrices) and for non-double images.
1.0.0.0

Needed modification of input arguments. Example added.