Identifying Criminals by Hands Visible in Images

8/16/2019 Identifying Criminals by Hands Visible in Images

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Peel Regional Police

Forensic Identification Services

Identifying Criminals by

Hands Visible in Images

SHANE TURNIDGE

AFIS ANALYST

[email protected]

3M Cogent Users Group International Conference

October 3 ! "o#ember $% &'( )ohnert *ar+% California% U,-


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Identifying Criminals by Hands Visible in Images

Sources of evidence

Methodolog !onsider"tions !"li#r"tion

!ell $hone i%"ges T&itter !"se stud The $"th "he"d

*resentation O#er#ie


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!ell $hones T"#lets ' !o%$uters

!"%er"s Internet ( Soci"l Medi"

,ources of /#idence


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0oo+ for reasonable close1upimages of hands and2or digits


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Methodology

)*Hori+ont"l Fli$$ing

,*Inverting

-*!l"rific"tion

.*!"li#r"tion

Image *rocessing


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Hand orientation ! *rint Orientation


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To snchroni+e " $hoto &ith " set of $rints ou %ust hori+ont"ll fli$either the i%"ge or the /no&n i%$ressions*


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In i%"ges0 the furro&s "nd the %"1or "nd %inor cre"ses usu"ll "$$e"rd"r/er "nd the to$s of the ridges usu"ll "$$e"r lighter*

Inverting the i%"ge0 essenti"ll cre"ting " neg"tive0 %"/es the surf"ce of theridges d"r/ "nd snchroni+es the ridges to the /no&n i%$ressions*

Image in#erting


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To undert"/e " co%$"rison ou %" &"nt to invert the$hotogr"$h*


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,ynchroni4ed5

)idges are no blac+ in both images6his is an e7cellent time to Clarify the image 8If you need to9


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:ualitati#e Considerations

Clarity

Much more than ;ust file si4e5


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Resolution

Focus Lighting Move%ent &hile the i%"ge #eing "c2uired 3$tics of the c"%er" Si+e of the !!D 4!h"rged !ou$led Device5 chi$ or !M3S

4!o%$le%ent"r Met"l 36ide Se%iconductor5 chi$ Meg"$i6els I%"ge co%$ression %ethod H"nd 3rient"tion

Clarity in Images


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:uantitati#e Considerations

Second"r "nd so%e Minor cre"ses %" not #e visi#le inthe i%"ge


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:uantitati#e Considerations

All ridge det"il visi#le0 including the det"il in the furro&s M" not #e visi#le in the i%$ression


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A friction ridge co%$"rison is c"rried out # %e"ns of " ridge

to ridge $rocess*

The e6"ct %"gnific"tion of one i%"ge to the other does not%"tter "s long "s the ridge to ridge $rocess is follo&ed*

Th"t s"id7 to "ssist " court0 1ur0 or " trier of f"ct0 #oth theevidence "nd i%$ression i%"ges should #e c"li#r"ted toe2u"l si+e &here $ossi#le*

Comparison


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6he e#identiary image must be of the same resolution as the +nonrecord image.


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8no&n Record


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8no&n Record

9hen using " /no&nrecords friction s/in to

c"li#r"te t&o i%"ges0 $ic/

t&o fe"tures "s f"r "$"rt

"s $ossi#le


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8no&n Record !ro$$ed i%"ge

Using the cro$ fe"ture0 $ic/ t&o $oints "nd cro$ the i%"ge*


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!ro$$ed i%"ge

:ec"use the cro$$ed i%"ge is vertic"l0 t"/e note of the height;


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Ag"in0 the cro$$ed i%"ge is vertic"l* Note the height in this i%"ge is )-*==c%*


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9e no& un>clic/ the res"%$le i%"ge #o6 "nd7

In$ut the


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Hori+ont"ll Fli$$ed

Evidenti"r I%"ge

9e unchec/ the res"%$le i%"ge #o6 "nd in$ut the

resolution v"lue fro% the cro$$ed i%"ge*

Hit 3/* The i%"ge is no& );) 4Actu"l si+e5


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Hori+ont"ll Fli$$ed

Evidenti"r I%"ge

!lic/ on the Res"%$le I%"ge #o6 "nd

enter the -@@$$i v"lue "nd clic/ 38*

The i%"ge is no& );) "nd -@@$$i*


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Calibration5

>oth images are no and ha#e the same resolution


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,itching gears


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i*hone (s


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i*hone


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,amsung ,3


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,amsung ,(


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,amsung ,


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>lac+berry A3'


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,ony Bperia A


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!r"igslist



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6itter case

An investig"tor &"s /ee$ing t"#s on the soci"l %edi" $osting of

/no&n g"ng %e%#ers* And he c"%e "cross this $osting of " g"ng

%e%#er th"t h"d " &e"$ons(e6$losives $rohi#ition "s $"rt of his

recogni+"nce*


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6itter case


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6itter case


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6itter case


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I%"ges "re onl going to /ee$ getting #etter "nd #etter* Need to develo$ #est $r"ctices* More "nd %ore c"se&or/? More gener"l "cce$t"nce*

S3BsC 3SA!BsC For%"li+"tionC St"nd"rdi+"tionC Finger$rint Source#oo/C

6he *ath -head


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)eferences Ash#"ugh0 D"vid R0 u"ntit"tive>u"lit"tive Friction Ridge An"lsis* An introduction to :"sic "nd

Adv"nced Ridgeolog* !R! ress 0)

N"tion"l Institute of ustice0 The Finger$rint Source#oo/

!hris Grice0 Sh"ne Turnidge; Identifing !ri%in"ls # H"nds isi#le in I%"ges7 Evidence Technolog

M"g"+ine; olu%e )-0 nu%#er .0 $"ges < ' )-* 4htt$;((&&&*evidence%"g"+ine*co%(v)-n.*ht%5

I%"ge "nd $hoto credits;

Slide ,; The 3nion 4Des/ c"lend"r5

Slide .; &&&*technics#log*co%0 &&&*cell$hone%dus"*co%0 ">el*#logs$ot*co%0 &&&*forl"nds""s*co%

Slide ; * Turnidge0 * Fr"ser0 M* Fischer0 D* !rder%"n0 M* flug

Slide =0


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)eferences

Understanding Palm Prints

I%"ge "nd $hoto credits continued7

Slide --; D* S$in/s

Slide -.; R* N"uffts

Slide -; M* flug

Slide -=; &&&*/i1i1i*co%

Slide -< > .); Evidence i%"ges; S* Turnidge

http://www.kijiji.com/http://www.kijiji.com/


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Peel Regional Police

Forensic Identification Services

Identifying Criminals by

Hands Visible in Images

SHANE TURNIDGE

AFIS ANALYST

[email protected]

3M Cogent Users Group International Conference

Documents

Identifying Criminals by Hands Visible in Images