Fast mutual information of two images or signals

Version 1.6 (2,26 KB) von Jose Delpiano
Optimized function for mutual information of two images or signals
4.4
(14)
16,2K Downloads
Aktualisiert 23. Feb 2015

Lizenz anzeigen

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)

Zitieren als

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. Abgerufen.

Kompatibilität der MATLAB-Version
Erstellt mit R2008b
Kompatibel mit allen Versionen
Plattform-Kompatibilität
Windows macOS Linux
Quellenangaben

Inspiriert: Image mutual information, image_MI.m

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Version Veröffentlicht Versionshinweise
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.