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
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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
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Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
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