I collected several images and then i applied this xcorr2(a,b) function. Now i got a value like 3.0281, after one minute I applied same function and got a result of 3.0282 like this. What is this value represents and why it is changing?

normxcorr2(a,b)
corr2(a,b)
autocorr(a)
autocorr(a,lags)

What is the output represented by above mentioned functions: I knew somewhat, what this functins are doing but bit confused while coming to output of these functions is that are pixel intensities or image densities etc, don't know..!!

[madhan ravi]

vpa( xcorr2(a,b) ) % what does it show ? suspect it's a floating point round off

[GUDIVADA ROKESH KUMAR]

Thank you, but what this floating point value represents?

[madhan ravi]

search floating-point as a tag in this forum and you will find a lot of discussions