[R] compare two fingerprint images

[Bernardo Rangel Tura]

On Sat, 2010-04-03 at 21:18 +0200, Juan Antonio Gil Pascual wrote:
> Hi Bernado
> 
> I need to compare two fingerprint images and let me know if you can do 
> with R. I have used the technique of minutiae but it seems to work 
> better with the cross-correlation and wanted to know if you can do with R.
> 
> Thank you very much
> 
> Juan
> 
> 
> Bernardo Rangel Tura escribió:
> > On Fri, 2010-04-02 at 20:52 +0200, Juan Antonio Gil Pascual wrote:
> >   
> >> Hello
> >> I wanted to compare two fingerprint images. How do you do with R?.
> >> Is there a role for cross-correlation of images?
> >>
> >> Thanks
> >>
> >>     
> >
> > Hi juan,
> >
> > You was a quite vage in your question, so I don't know exactly what you
> > need but try this;
> >
> > require(ReadImages)
> > x <- read.jpeg(image1)
> > x1 <- read.jpeg(image2)
> > table(x1==x)
> >
> >
> >   
> 

Juan,

I don't know cross-correlation to images but I know this for time series
in this case:


ccf(ts(as.numeric(x)),ts(as.numeric(x1)))


-- 
Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology
Brazil