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Thread Subject:
subpixel registration

Subject: subpixel registration

From: THU ??

Date: 15 Jul, 2010 11:30:22

Message: 1 of 3

Hi all,
I want to realize subpixel registration by phase correlation, but how can I get two known sub-pixel accuracy images, which also called ground truth? Thank you all!

Subject: subpixel registration

From: Sean

Date: 15 Jul, 2010 13:14:04

Message: 2 of 3

"THU ??" <hhj09@tsinghua.edu.cn> wrote in message <i1mrge$2tu$1@fred.mathworks.com>...
> Hi all,
> I want to realize subpixel registration by phase correlation, but how can I get two known sub-pixel accuracy images, which also called ground truth? Thank you all!

Take a look at this FEX submission: %quick and easy way
http://www.mathworks.com/matlabcentral/fileexchange/18401-efficient-subpixel-image-registration-by-cross-correlation

Also, this thread: %Really thorough explanation
http://www.mathworks.se/matlabcentral/newsreader/view_thread/269829

Subject: subpixel registration

From: ST H

Date: 16 Jul, 2010 00:55:05

Message: 3 of 3

Thank you!
In the FEX ,I can't understand this line:
 phase=2;g = ifft2(fft2(f).*exp(i*2*pi*(deltar*Nr/nr+deltac*Nc/nc))).*exp(-i*phase);
why he add a phase of 2 radians to g(x,y)?


"Sean " <sean.dewolski@nospamplease.umit.maine.edu> wrote in message <i1n1is$shg$1@fred.mathworks.com>...
> "THU ??" <hhj09@tsinghua.edu.cn> wrote in message <i1mrge$2tu$1@fred.mathworks.com>...
> > Hi all,
> > I want to realize subpixel registration by phase correlation, but how can I get two known sub-pixel accuracy images, which also called ground truth? Thank you all!
>
> Take a look at this FEX submission: %quick and easy way
> http://www.mathworks.com/matlabcentral/fileexchange/18401-efficient-subpixel-image-registration-by-cross-correlation
>
> Also, this thread: %Really thorough explanation
> http://www.mathworks.se/matlabcentral/newsreader/view_thread/269829

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