signal similarity measurement - cross-correlation

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oblivious
oblivious 2014-4-21
评论： Mohammad Al Nagdawi 2018-8-2
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?

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回答（1 个）

Image Analyst
Image Analyst 2014-4-21
Have you tried normalized cross correlation? If it's an image you can use SSIM, which is popular.
  2 个评论
Image Analyst
Image Analyst 2014-4-21
There is a function normxcorr2() in the Image Processing Toolbox, if you have it.
Mohammad Al Nagdawi
Mohammad Al Nagdawi 2018-8-2
the output of normxcorr2() is matrix. Is there is cross-correlation function output is single value similar to MI

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