Re: cross-correlation for image registration

[Matt Nicholas]

On 2/21/12 5:59 AM, Carnë Draug wrote:
> On 16 February 2012 17:04, Matthew Nicholas<address@hidden>  wrote:
> > > Quoting Carnë Draug<address@hidden>:
> > > > On 15 February 2012 21:15, Matt Nicholas<address@hidden>  wrote:
> > > > This might work for image registration with a small set of cases 
> > > > (eg bright spot on a dark background), 
> This is exactly my case. I do fluorescence microscopy, bright spots
> moving on a black background that I want to track. Since it also
> passes the example here
> http://www-rohan.sdsu.edu/doc/matlab/toolbox/images/normxcorr2.html I
> didn't bother about it anymore.

I also happen to be a microscopist, which is where I do most of my image 
processing (a side project led me to use normxcorr2 for other types of 
images), so it is nice to know that it works well in this case!

> > >   If I can find the time, I'll try to implement it and see how far I get.
> If you are able to implement this, that would be great. I'll gladly
> add it to the image package. I don't know thought if it would be
> better to fix the coeff option of xcorr2 and keep normxcorr2 a wrapper
> for it though.
That is a good point. To be honest, I am not sure whether the coeff 
option is 'wrong' or just follows some other definition of normalization 
than the one I want in this case. I'll try to figure this out and report 
back if I come up with anything.

Thanks again,
Matt