New Techniques for Raising and Identification of Fingerprints
| Author | Sorin Gîfei |
| Position | Security Advisor S.C. Blue Air Transport Aerian S.A. |
| Pages | 1-13 |
1
NEW TECHNIQUES FOR RAISING
AND IDENTIFICATION OF FINGERPRINTS
Col. (r) Ph.D. Sorin Gîfei
*)
Abstract
Forensic experts have discovered recently new techniques for identifying
fingerprints. New methods may now be used to identify hidden fingerprints, digital
impressions found on metals. Now fingerprints can be mathematically described
by a new model. Sexual offenders can be easier identified. Analyzing fingerprints
drugs and diseases antibodies could be detected. By using light sources a better
fingerprinting could be obtained. Analyzing fingerprints it can be established if a
suspect has been in contact with chemicals such as drugs and explosives.
Keywords: New forensic techniques; fingerprints; drugs; diseases;
criminality; researchers; trace; fingerprinting; fingerprints mathematically
model; explosives; desorption by electrospray ionisation
Introduction
,,There can be no crime without a trace. Homicide is based on the fact that an
offender, most often without his knowledge, leaves always traces at the scene”
1)
.
Edmond Locard formulated the basic principle of forensic science: “Every
individual who moves into an environment leaves traces”
2)
.
Broadly, crime trace means ,,the most varied changes that may occur in the
environment as a result of criminal actions”
3)
.
In a narrow sense, crime trace means ,,traces formed by reproducing the
exterior construction of an object on another object”
4)
.
In a comprehensive definition, crime trace means ,,any material changes
occurred because of the interaction between offender, the means used by the parts
of an environment where their criminal activity took place, changes which,
individually or fully examined, may lead to: scene setting, identification of the
perpetrator, the means used to clarify the circumstances of the case”
5)
.
*)
Security Advisor S.C. Blue Air Transport Aerian S.A.
1)
P. F. Ceccaldi, Forensics, Press Universitaires de France Publishing House, Paris, 1962, p. 6.
2)
http://en.wikipedia.org/wiki/Edmond_Locard.
3)
S. A. Golunski, Forensics, ŞtiinŃifică Publishing House, Bucharest, 196 1, p.82.
4)
C. Suciu, Forensics, Didactică şi Pedagogică Publishing House, Bucharest, 1 972, p.200.
5)
Gh. Păşescu, Treaty of Forensic Practice, Ministr y of Interior Publishing House, Bucharest,
vol. I, 1976, p.117-118.
2
Crime trace means any material change occurred in terms of committing a
criminal act between the deed and the change produced being a causal link”
6)
.
Regarding traces classification, Edmond Locard distinguished ,,prints (digital,
tangible, clothing, animals, etc.) and traces (objects left by the offender, burglary
tools, hair etc.)”
7)
.
French forensics offers a modern classification of traces, respectively
indeterminate traces (which may have chemical nature, biological or non-biological
but do not indicate the author) and determined traces which have physical nature,
produced by pressing, rubbing or pulling, allowing the identification”.
The forensic chapter dealing with the forensic examination and classification
of papillary relief, and after that the identification of its details is called
dactiloscopy
8)
.
Finger traces found at the scene are called fingerprints, those taken are called
experimental digital impressions and photos papillary relief obtained by
photographing the traces and impressions are called dactilograme
9)
, which
otherwise are the object of study in forensic identification process
10)
.
Human traces refer to: ,,the changes created by hands, feet, forehead, nose,
lips, ears, and biological traces of human blood, saliva, hair, semen”
11)
.
Fingerprints have a crucial role in criminal investigations. They are most
commonly used as forensic evidence worldwide because a person's fingerprints are
unique. Even for identical twins, who share the same DNA, no fingerprints were
identical and they do not change throughout the whole life. Papillary traces can be
collected on the spot or on different objects - sample spot and identify potential
suspects, victims and others who have reached the area concerned, to make the
connection between certain crimes or to place the suspect at the crime scene.
Papillary drawings are distinguished by shape and characteristic details,
whose number and variety are not to be possible meeting of two identical digital
impressions
12)
.
Francis Galton concluded that only a total of 64 billion digital impressions
might meet two perfectly identical ones
13)
.
6)
E. Stancu, Forensic Treaty, Actami Publishing House, Bucharest, 2001, p.114-115.
7)
E. Locard, Forensic Treaty. Fingerprints and traces in investigations inquiries, Desvigne
Publishing House, Lyon, 1931, vol. I, p. 9.
8)
M. Minovici, Full Forensics Treaty, vol. II, Bucharest, 1930, p .1039-1041.
9)
V. Sava, Manual of Dactiloscopy, BucHAREST, 1943, p.35.
10)
I. Mircea, Forensics, 2
nd
edition, Printing House of ,,Chemarea” Foundation Iaşi, 1994,
p.72.
11)
L. Ionescu, Forensics. Course Notes, Dimitrie Cantemir Christian University, 2002,
Bucharest, p.27-34.
12)
L. Cârjan, Forensics, Pinguin Book Publishing House, Bucharest, 2005 , p. 188.
13)
F. Galton, Finger-Prints, McMillan Publishing House, London, 1892, p.109.
3
Findings confirmed mathematical calculations related to dactiloscopy.
Although this method of identification is almost ten decades of police
enforcement in all civilized countries, so far there have not been reported any
likeness between two digital impressions
14)
.
Digital design remain immutable from birth until the time when, by
putrefaction skin decays. If the overall dimensions of the body and its parts and
declines over time according to different influences, while skin and hair color,
facial expressions, features, gestures and even writing change with age, just digital
impressions remain constant and identical to themselves.
This property should not be considered in a fixist way because it cannot be
exceeded the probability of changes that are not able to cause a qualitative
difference between papillary drawings of the same person
15)
.
There are three general groups of methods used to make visible traces of
latent papillary respectively: physical methods, chemical methods and
instrumental methods.
Digital footprints can be of surface and deep. Trail surface may be, in turn,
visible and invisible (latent).
Traces, which are also called colored, are left by fingers contaminated with
colored substances such as blood, paint, ink, mud, dust, cement, soot, chalk, ink, etc.
In some cases, colorful digital traces left on objects not in perfect conditions
retained design features papillary stain is simple, because of the substance soaking
ditches separating the papillary ridges.
Papillary invisible traces (also called latent) are those ones obtained by filling
remain human sweat and grease from the skin, the effect of touching with hand or
plant, voluntarily or involuntarily, of certain objects.
The means and invisible traces are as well the ones that are visible to some
extent, but to be properly considered to be revealed.
Traces remain in print papillary depth profile of papillary ridges in various
plastics.
Digital footprints are searched very carefully because they are small,
sometimes reproducing only fragments of the drawings papillary which could be
barely seen. When searching for traces extreme caution is needed in order not to
leave their traces or inadvertently, to remove those that are delinquent
16)
.
In recent years, scientists have discovered a number of new techniques for
raising and then identifying fingerprints.
14)
L. Cârjan, Cited Book, p. 189.
15)
J. I. Thornton, The doctrine of dessimilation of the unique identification dactiliscopique,
R.I.P.C., nr. 306, martie, 1977, p. 89.
16)
Gh. Păşescu, Ion. R. Constantin, Fingerprints secrets, NaŃional Publi shing House,
Bucharest, 1996, p.139-142.
4
A. New fingerprint breakthrough by forensic scientists
University of Leicester and Northamptonshire Police research reveals new
techniques for identifying prints on metals
17)
.
The new method will allow forensic specialists to visualize fingerprints even
after they have been raised on the spot.
Even more interesting is that this new technique using a fingerprint that was stored
on a small metal tube before firing cartridge may even increase after the drawdown
18)
.
The research group leader, dr. John Bond, said: ,,For the first time there can
be obtained fingerprints from people who have manipulated the cartridge before it
is fired”
19)
.
This discovery allows specialists to reopen old criminal cases even decades.
The researchers have also found that fingerprints can corrode metal surfaces.
Delete, washing with warm soapy water makes no difference to the heat and
percussion cartridge facilitates this new forensic identification process.
The new technique discovered works by applying an electrical charge on a
metal, such as a gun or cartridge case which has been in contact with a powder
similar to that used photo copiers
20)
.
Even if the fingerprint has been washed, it leaves a slight corrosion metal and
powder draws the load is applied, thus removing a fingerprint record that this new
method can be raised in good conditions.
The technique described can be used on any metal pipe from a box of
cartridges to guns.
The heat evaporates normal clues, but police will be able to prove who
handled a particular gun.
Experts say that using this method, even after decades, old criminal cases can
be reopened, because fingerprints do not disappear again. The new technique also
works in cases where traces could be left on other types of metals
21)
.
According to dr. Bond, the only way to avoid being identified as a result of
digital traces to be cleaned with an abrasive object, causing the removal of a layer
of that metal
22)
.
This research has demonstrated the ease with which created the possibility
that the eccrine rich fingerprints to corrode over a wide range of metal surfaces,
including alloys. Corrosion process depends on the chemical concentration of
chloride ions present in eccrine sweat
23)
.
17)
http://www.eurekalert.org/pub_releases/2008-06/uol-nfb060208 .php.
18)
http://www.northants.police.uk.
19)
http://www.thisis leicestershire.co.uk/news/police-plea-Leicester-fingerprint-expert/article-
1931650-detail/article.html.
20)
http://www.le.ac.uk/forensic-research/.
21)
http://www.blackwellpublishing.com/jfo.
22)
http://www.le.ac.uk/forensic/research/drjohnbondfellow.html.
23)
http://crime.about.com/od/forensics/a/metal_prints.htm.
5
Water makes up over 99% of the digital prints. Water content of the
fingerprint residues acts as an electrolyte and allows galvanic corrosion to take
place on the outer surface of the metal.
Corrosion of metal surface was analyzed by using these innovative forensic
techniques
24)
.
For this reason the metal surface to be loaded with up to 2,500 KV electricity
to be used as a granular powder.
Although this new technique is being patented, has already been used to
demonstrate that it is one viable solution to the extremely difficult problem of
increasing the fingerprint placed in the cartridge shell fire before execution.
This technique was published in the journal Forensic Science, titled ,,View of
latent fingerprints on metallic surfaces”
25)
.
Experts have studied the chemical reactions produced between fingerprints
and a variety of metal surfaces investigated by heating the metals to a temperature
of 600° C after the submission of fingerprints. Ionic salts present in fingerprints
corrode metal surfaces and provides a fingerprint image that is durable and
resistant to cleaning metal
26)
.
Zoom level fingerprint is independent by the time that has elapsed between
the fingerprint storage and heating but it depends very much on the metal
composition and salt secretion level of the person who left the fingerprint.
The results obtained so far allow practical applications to enhance fingerprints
that are spot fires, contaminated by spray paint or deposited on brass cartridge
tubes before running fire
27)
.
Corrosion of metal surface is further used to perform fingerprint increase the
electrostatic charge on the metal and then metal dust adhesion to the surfaces
corroded metal parts.
Due to lack of evidence, crime produced 15 years ago, for example, could not
be elucidated.
U.S. Police have called the support team of researchers and positive results
did not appear immediately.
Last year, dr. Bond has helped rising and then identifying a fingerprint on a
cartridge case which had been lifted from the spot where a murder committed in
Texas, U.S.A. The fingerprint is very good and the only remaining issue to be
determined is to identify the person to whom it belongs
28)
.
24)
http://www.moreinspiration.com/Innovation.aspx?id=3544.
25)
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1556-4029.2 008.00738.x.
26)
http://www.mcs.le.ac.uk.
27)
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1556-4029.
28)
http://www.amw.com/fugitives/brief.cfm?id=59727.
6
B. New technique to help catch sexual offenders
Experts from Sheffield Hallam University have discovered a new technique
that can be used to identify sexual offenders. Sexual offenders hoping to fool the
police using a condom during the commission of crimes can be deprived of the
chance to escape unpunished thanks to a new technique performed by specialists
from Sheffield Hallam University, who can prove that they have had contact with
a condom and it can place it to place where the crime
has been committed
29)
.
Due to the risk of transmission of sexually
transmitted diseases and to prevent transfer of DNA
evidence in recent years an increase in condom use by
sexual offenders from the system has been observed.
The method discovered by researchers at the
University Center for Biomedical Research referred
allow lifting and fingerprint identification of condom
lubricant left on the spot by the suspect.
This new technique can make the link between a
suspect, identified by fingerprints, and crime. Thus,
police may have helped to establish and if the crime occurred. It is hoped that this
method can be used to link the fingerprint and grease residues identified from
vaginal swabs collected from the victim
30)
.
Researchers have successfully detected for the first time fingerprint oils from
two brands of condoms widely available and this innovative method has proven to
be successful even for fingerprints that were not collected several weeks before
analysis.
Experts hope that this technique can be used to identify certain types of
grease, being able to indicate a specific manufacturer or even a particular brand
condom. This would allow any forensic case to have a greater role to prove
whether the acts were committed or not.
For this study, researchers used MSI MALDI (matrix-assisted laser desorption
/ ionization mass spectrometry imaging), a powerful technology that can be used
to map the ridge patterns of fingerprints
31)
.
Dr. Simona Francese, from the same university, said: ,,Criminals are increasingly
aware of the consequences of acts committed, and discovered techniques to prove
them. However, the sexual offenders do not take into account the possibility that the
condom lubricant can transfer fingerprints left at the scene”
32)
.
29)
Article p ublished on 19.01.2011 in the magazi ne of Hallam University from She ffield
Great Britain, retrieved electronically on http://www.shu.ac.uk/news/release. html?ID=765.
30)
http://www.medical-valley-emn.de/services/news/global?page=142.
31)
http://www.skdb.info/.
32)
http://www.sciencedaily.com/releases/2011/01/110119132517.ht m.
7
Dr. Rosalind Wolstenholme, co-author of the research, said: ,,If the condom
lubricants fingerprints can be identified, it would improve the evidence needed for
criminal prosecution as may be established with the author on the spot and very
importantly, he had contact with a condom. This would allow specialists to
provide additional support for the collection of evidence necessary to solve cases
of alleged sexual assault”
33)
.
C. Identifying hidden fingerprints
Hidden fingerprints can now be revealed quickly and reliably thanks to two
new discoveries in nanotechnology
34)
.
Currently, the method used for fingerprint detection coverage area requires an
aqueous suspension of gold nanoparticles and citrate ions. In acidic conditions,
gold particles positively charge particles placed in print. Then print is developed
using a solution of silver ions, which react chemically to give a form of silver
along the ridges of the print
35)
.
However, the solution used by this method is unstable, and the results are
difficult to be repeated. Therefore, Dr. Daniel Mandler, Ph.D. Joseph Almog and
their team at the Hebrew University of Jerusalem, Israel, used a more stable
solution by adding hydrocarbon chains of gold nanoparticles, which were
suspended in light oil
36)
.
Impressions produced using the new solutions have a very high quality, being
obtained after only three minutes of immersion.
The team used this technique on non-porous surfaces, using a petrol ether
suspension of cadmium selenide / zinc sulfide. In this case, by the chemical
reaction fluorescent impressions have been obtained, so there is still necessary a
further step.
Antonio Cantu, an expert in forensic science for the United States Secret
Service in Washington, said, ,,These revolutionary techniques are able to greatly
improve their saving and transforming latent impressions in the evidence”
37)
.
Dr. Claude Roux, director of the Center for Forensic Science at the University
of Technology Sydney, Australia, said: ,,This new nanotechnology using method
can bring fingerprints to identify practical solutions to develop and enhance latent
fingerprints, which would otherwise remain undetected”
38)
.
33)
http://www.alphagalileo.org/ViewItem.aspx?ItemId=93971&CultureCode=en.
34)
http://www.sciencedaily.com/releases/2007/03/070315132718.ht m.
35)
http://www.rsc.org/publishing/journals/cc/article.asp.
36)
M. Halon, Nanotechnology enables to obtain much better fingerprints, article retrieved
electronically on http://www.gizmag.com/go/6996/.
37)
http://www.nap.edu/openbook.php?record_id=11276&page=6.
38)
http://projects.nfstc.org/trace/index2007.htm.
8
D. New techniques for identifying crime discovered by specialists in
U.S.A.: Fingerprint analyses using the process of desorption by electrospray
ionisation (DESI)
39)
Current methods allows analysis of forensic analysis to identify the
fingerprints only.
A new technique, identified by U.S. experts and completed in August 2008,
allows forensic experts to determine, by analyzing fingerprints, the chemical
components which make up fingerprints. By analyzing them, it can be determined
whether a suspect has been in contact with chemicals such as drugs or explosives
40)
.
Fingerprints can now be used to detect traces of drugs or explosives, as it has
been proved recently in one of the most important discoveries in recent years of
forensics. The new discovery enables American experts to say much more about
people: what they have achieved, what they ate, what drugs they were used
41)
.
Additional information is of great importance in cases where it is necessary to
make a connection between a person and certain types of chemicals such as toxins
or explosives. Currently, scientists can determine not only who is an individual,
but also the substance used.
Police is now able to analyze fingerprint traces of cannabis, cocaine, other
drugs or explosives.
The new technique reveals in detail the chemical components that make up
the fingerprint. Now small traces of chemical components of different fingerprints
types may indicate the presence of diseases or ailments.
This method can be used directly on a fingerprint, even where the mark is
found, without the need for lifting and analysis in a laboratory.
Dr. Demian Ifa, Professor Graham Cooks, along with colleagues at Purdue
University in West Lafayette, U.S.A. explained how they had discovered a
technique, called desorbtion by electrospray ionization (DESI), which involves
spraying a solvent onto a surface that is a fingerprint and then analyzing the
droplets resulting from the release print with a method called mass spectroscopy.
This method could be used to establish if a person handled cocaine, explosives
or other materials which can be identified through a fingerprint analysis.
39)
S. Gîfei, New techniques for identifying crime discovered by specialists in the U.S.A.:
fingerprint analysis by using the process of desorbtion by electrospray ionisation (DESI), Law
Magazine, The Romanian Association of Jurists, nr. 1/2009, C.H. Beck Publishing House,
Bucharest, 2009, p. 171-173.
40)
Press Agency Xinhua, New techniques of establishing fingerprint chemical components, article
identified electronically on http://www.news.xinhuanet.com/english/2008-08/08/content_9041951.htm.
41)
D. Castelvecchi, Advanced technology for analyzing fingerprints, article identified
electronically on http://www.sciencenews.org/view/generic/id/35012/title/Fingerprints_go_high-tech.
9
The new technique relies on a device called mass spectrometer, which uses
electric and magnetic fields to analyze chemical compounds in order to identify a
sample of the material contained in a fingerprint
42)
.
According to dr. Cooks, this technique provides a ,,picture of the chemical
fingerprint”, with a higher resolution than those offered by any other forensic
techniques and can analyze a particle size which may be even a nanogram of
material.
The classic example of a fingerprint, which is a printing ink, show deltas and
loops used for identification, but analyzing fingerprints lifted from the field may
show a distribution of molecular components. Fingerprint is made up of natural
components of skin, and some of them are taken from other areas or materials that
a person has achieved.
Researchers can detect very small traces of chemical compounds marked with
dots on the footprint analysis, which represents the type of digital fingerprint left
by the person concerned.
This technique can help to raise small amounts of drugs (such as cocaine or
THC
43)
, the active ingredient derived from marijuana, and the rise of compounds
obtained from explosives).
Researchers have also established that this method is useful for identifying
compounds produced by metabolism or components can be identified in the
secretions of fingerprints, whose presence may signal other processes that occur
inside the human body.
Also, fingerprints can be analyzed using a standard software system to
attempt to identify the person and to determine whether fingerprints obtained do
not overlap with others.
Due to the fact that the distribution of compounds identified in each
fingerprint can be unique, this technique can be used to extract a fingerprint
beneath layers of other fingerprints.
Visualizing chemical compounds in this way, scientists can effectively
analyze fingerprints, they can separate from each other and can get a clear picture
of each fingerprint. Images can then be used on a fingerprint recognition software
in identifying the person
44)
.
The team of American researchers is now studying whether this technique
could be used as an alternative to blood or urine tests performed for athletes
45)
.
42)
E. K. Gardner, Fingerprints can provide solutions not only for establishing the identity of persons,
article retrieved electronically on http://www.purdue.edu/UNS/x/2008/b/080807CooksFingerprints.html.
43)
T.H.C. is a chemical compound, C
21
H
30
O
2
, obtained from cannabis or made synthetically,
which is the basic narcotic in marijuana and hashish.
44)
R. Highfield, A new method of analysis helps police D.N.A. investigations, article identified
electronically on http://www.telegraph.co.uk/earth/main.jhtml?xml=/earth/2008/08/07/sciprints107.xml.
45)
A new method for analysis of fingerprints can identify drugs and explosives, article
identified electronically on http://www.drugs-forum.co.uk/foru m/showthread.php?t=65159.
10
Debbie Krantz, a spokesman of Thermo Fisher Scientific Inc. said: ,,The unit
which made these devices, found that a mass spectrometer similar to that used by
American researchers will cost about 350,000$, compared to standard techniques
used today, which cost less than 100$
46)
.
New method of testing may be available in a year or two, but the process is
more expensive and lasts longer than the current procedure for analyzing
fingerprints, so to use the new technique of law enforcement agencies need much
greater financial resources.
E. Antibody tests on fingerprints to detect drugs and diseases
Currently, fingerprints are used only when the author has to be taken against a
measure or a person must be identified. Scientists in Great Britain have conducted
a research aiming at making possible to use fingerprints for drug discovery and
disease diagnosis
47)
.
The team of researchers from the University of East Norwich and King's
College London were able to use specific antibodies to differentiate between the
fingerprints of smokers and nonsmokers
48)
.
Forensic fingerprints are useful only when included in a database or can be
directly compared with those of a suspect.
Because of this new discovery, we now have the opportunity to obtain
information about the lifestyle of the person who left fingerprints, which could
reduce the circle of suspects.
Therefore, fingerprints are now used to detect drugs, medicines, foods that
were consumed and also to diagnose certain diseases.
Researchers want to combine all these secrets to be found in small traces of
perspiration that leaves an imprint on a surface. The research team demonstrated
the ease of the above, making a distinction between fingerprints made by smokers
and nonsmokers. To obtain correct results, researchers have developed a system to
detect cotinine, formed in the human body after consumption of nicotine.
The researchers soaked fingerprints with a solution containing gold
nanoparticles to which cotinine-specific antibodies were attached. It binds to
cotinine. Then a secondary antibody, which was applied a fluorescent dye binds to
cotinine antibodies, which are placed on a fingerprint. Since there are many
cotinine antibodies attached to each nanosphere, there is a significant leverage.
It was found that the fingerprints of smokers reveal fluorescent ridge patterns,
and not those of non-smokers.
46)
New combined services, article identified electronicall y on http://w ww.newsday.com/
services/newspaper/printedition/friday/health/ny-hsfore085793112aug08,0,411405.story.
47)
http://www.sciencedaily.com/releases/2007/05/070516123538.ht m.
48)
http://www.kcl.ac.uk/index.aspx.
11
Fingerprints are easily treated and can be lifted for comparison with known
impressions, just as with normal procedures. When this process is amplified, even
when sweating highlighted by tiny pores that run along the finger ridges are visible.
In addition to forensic applications, this method is used to detect doping.
Changes in the subjects tested samples would be very difficult, because each sample
is unique and each person is assigned based on the model examined the ridge.
Another application of this new method could be to identify drugs, without
taking blood samples from drivers such suspects.
F. Fingerprinting by using light sources allows a better control of crime
Researchers in Great Britain have discovered a fast way of fingerprinting for
improving the collection and analysis of fingerprints found at the scene
49)
.
Standard methods used to collect fingerprints found at the scene, such as
powders, amend valuable forensic clues, including traces of chemicals which may
be digital impressions. In the new study, Sergei G. Kazarian at Imperial College
London and colleagues used a special gelatin tape to collect fingerprints from
several different areas, including a door handle, handle a cup, a glass surface bent
and a computer screen. They exposed the imprinted gels to a highly sensitive
instrument using a beam of light in the infrared detector array to obtain digital
fingerprint images collected.
This method has revealed valuable information about the chemical
composition of impressions, providing information about individuals who have
made (for example smoker, vegetarian) and the presence of contaminants in
impressions. This may be offered clues about what the suspects were manipulated
(for example food, drugs) and therefore could be useful in identifying an offender.
In addition, new methods using the original fingerprint can be kept intact and are
available for further analysis
50)
.
G. Fingerprints, described by a new mathematical model
Vladimir Goudkov, from Chelyabinsk State University, Department of
Applied Mathematics and Computer Science, Russia, proposed an innovation that
can be applied globally, according to his new mathematical model representation
of fingerprints
51)
.
The discovery is protected by no less than 16 patents, which have received
approval from the Russian Federal Institute of Industrial Property and the Russian
Federal Department responsible for intellectual property.
49)
http://pubs.acs.org/doi/full/10.1021/ac070580j.
50)
http://www2.imperial.ac.uk/imedia/videos/view/186/professor-sergei-kazaria n.
51)
http://www.ziare.com/magazin/cercetare/amprentele-digitale-descrise-de-un-nou-model-matematic-
1052197.
12
The paper is in fact the author's doctoral thesis entitled "Mathematical models
and methods of typing digital imaging”.
The novelty of this work is that the author has built a trace analysis system
based on topological vector.
The system automatically reads a fingerprint image, not as a mere image, but
as a relief map with a certain orientation.
This method allows identifying and fingerprinting of poor quality, with traces
of fat, deformed, or with various defects.
The mathematical model proposed is based on software whose use requires
only a computer, a digital fingerprint sensor and a database of fingerprint images.
Models, programs and methods developed can be used in the passports and visa
systems, where control systems and systems of movement and access.
Conclusions
New methods of identifying and lifting fingerprints can now be used to
identify hidden fingerprints, a digital impressions found on metals, to identify the
treatment of sexual offenders. Thanks to the new techniques used antibodies can
be analyzed to detect fingerprints on drugs and diseases. Fingerprints can now be
described by a new mathematical model. If used, light sources can make a better
fingerprint impression. Analyzing fingerprints it can be established if a person
dealt with chemicals such as drugs and explosives.
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