Pattern Comparison

Hi

I have two patterns:

https://picasaweb.google.com/105273225475657516590/ChladniResearch?authuser=0&authkey=Gv1sRgCKf1y864xZKPtgE&feat=directlink

How can I compare the patterns' similarity- mathematically Something like... Pattern 2 is 60% 'like' Pattern 1 [Base] ~~

Can anybody suggest me a matlab script todo so

Thanks in advance P.S. I am also new to matlab

Answer 1

[Image Analyst]

You might want to look at spatial statistics ( http://en.wikipedia.org/wiki/Spatial_analysis) or optical flow ( http://www.csd.uwo.ca/faculty/barron/)if you're trying to quantify those orange dots and how they change position and clustering or randomness. Chapter 15 of Brian Ripley's ( http://www.stats.ox.ac.uk/~ripley/ ) on "Modern Applied Statistics with S" has a chapter on spatial stats. One common way is to count the number of neighbors within a circle of a given radius.

[Mohit]

Thank you Image Analyst, optical flow looks like a suitable method to use.

But do you know anything that can give me percentage [or on a scale 0-1] on the amount of similarity between two images?

I have looked at Digital Image Correlation & Image Registration but I can't find any matlab files which give a percentage value... Please help, THANKS

[Image Analyst]

No, I haven't used optical flow yet for any of my projects. Correlation won't give you good results if you have discrete objects that are changing location. You can go here http://iris.usc.edu/Vision-Notes/bibliography/contents.html for further research on other methods.

[Mohit]

Hi, I looked at a few optical flow matlab programs.

Download Source Code:

http://people.csail.mit.edu/celiu/OpticalFlow/

Can somebody please tell me why I am getting this error when I run the 'demoflow.m' file in matlab:(I have also saved all the files in my matlab work folder)

-------

Warning: Name is nonexistent or not a directory:

mex.

> In path at 110

In addpath at 87

In demoflow at 1

??? Attempt to execute SCRIPT Coarse2FineTwoFrames

as a function:

/Users/*********/Documents/MATLAB/Coarse2FineTwoFrames.m

Error in ==> demoflow at 27

[vx,vy,warpI2] =

Coarse2FineTwoFrames(im1,im2,para);

------------

Thanks