Enlightening and entertaining - Thanks Charles :)
----------------Contact Details:------------------------------------------------------- Contact me: tal.gal...@gmail.com | 972-52-7275845 Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | www.r-statistics.com (English) ---------------------------------------------------------------------------------------------- On Sun, Apr 4, 2010 at 8:14 PM, Charles C. Berry <cbe...@tajo.ucsd.edu>wrote: > On Sun, 4 Apr 2010, Tal Galili wrote: > > Hi Jim, >> Another thing I am wondering is - even if you have a metric for comparing >> two images (which I admit I didn't come across and I don't know how to >> approach), would that be enough to decide if two images are "close" or >> not? >> My guess is that no - one would also need a database of other >> fingerprints, >> to compare how much a particular image is closer to another image, >> compared >> to how other images are close to that image. >> > > Well, I am not Jim, but there is a literature on fingerprint ID starting > before 1892 when Galton's "Finger Prints" was published (see below). > > > And yes, you need a database. > > "The main challenge in studies of fingerprint individuality is > to adequately capture the variability of fingerprint features > in a population. " > > from: > > Sarat C. Dass and Mingfei Li, Hierarchical mixture models for assessing > fingerprint individuality. Ann. Appl. Stat. Volume 3, Number 4 (2009), > 1448-1466. > > === > > See > > http://galton.org/fingerprinter.html > > for a summary of Francis Galton's work and a links to classic works like > his 1892 opus: > > "Let no one despise the ridges on account of their smallness, for they are > in some respects the most important of all anthropological data. " Galton > 1892. > > It is amusing to me to ponder how Galton might have revised that statement > in view of modern DNA sequencing technology. 'Let no one despise the > nucleotide bases on account of their smallness, ...' > > > HTH, > > Chuck > > > >> >> >> Tal >> >> >> ----------------Contact >> Details:------------------------------------------------------- >> Contact me: tal.gal...@gmail.com | 972-52-7275845 >> Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | >> www.r-statistics.com (English) >> >> ---------------------------------------------------------------------------------------------- >> >> >> >> >> On Sun, Apr 4, 2010 at 1:55 AM, Jim Lemon <j...@bitwrit.com.au> wrote: >> >> On 04/04/2010 05:18 AM, 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. >>>> >>>> Hi Juan, >>>> >>> If you're using minutiae, you will want something like character >>> recognition to identify the (admittedly arbitrary) elements of >>> fingerprints >>> like loops and whorls and their relative extents and positions. I don't >>> know >>> whether there is much character recognition stuff done in R, but it would >>> certainly be related. >>> >>> Jim >>> >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >>> >> [[alternative HTML version deleted]] >> >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >> > Charles C. Berry (858) 534-2098 > Dept of Family/Preventive > Medicine > E mailto:cbe...@tajo.ucsd.edu UC San Diego > http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901 > > > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
