signal similarity measurement - cross-correlation

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Hi,
I am simulating an ultrasound imaging system. Here I need to compare two large time series using xcorr(). But, the computation time is higher than I expected and cross-correlation is taking up most of the time. I tried things such as phase zero search in analytic signal etc. But, I need something other than cross-correlation. Is there any other algorithm than cross-correlation to measure the similarity between two signals?

Answers (1)

Image Analyst
Image Analyst on 21 Apr 2014
Have you tried normalized cross correlation? If it's an image you can use SSIM, which is popular.
  2 Comments
Image Analyst
Image Analyst on 21 Apr 2014
There is a function normxcorr2() in the Image Processing Toolbox, if you have it.
Mohammad Al Nagdawi
Mohammad Al Nagdawi on 2 Aug 2018
the output of normxcorr2() is matrix. Is there is cross-correlation function output is single value similar to MI

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