Development*of*NFIQ*2.0*

elham.tabassi@nist.gov

h:p://www.nist.gov/itl/iad/ig/development_nfiq_2.cfm

April*26,*2013*

Winchester,*UK*
2010*workshop*

2004*M*present*

2004* •Release*of*NFIQ*1.0*

•Novel*definiPon*of*biometric*

quality**

•performance*related*

•accepted*by*the*community*

•Interoperability**

•uniform*interpretaPon*

•tuned*to*a*class*of*matcher**

•Open*source*

•Extensively*examined*

•by*NIST*and*others*

•tools*for*quality*

summarizaPon,*slap,*...*

•Workshop*on*March*6,*2010*

(IBPC*2010)*

•NFIQ%2.0%wish-list%as of

March%2010%

•Several*opPons*for*NFIQ*2.0*

were*discussed

•h:p://biometrics.nist.gov/

cs_links/ibpc2010/

opPons_for_NFIQ2.0.pdf*

•The*community*

overwhelmingly*

recommended*a*new,*open*

source,*generalized*version*of*

NFIQ*to*be*developed*in*

consultaPon*and*

collaboraPon*with*users*and*

industry.*

•Same*technical*approach,*

but*be:er,*bigger,*faster,*

etc.**

*porksh 2012*wo

•Workshop*on*March*5,*2012*

(IBPC*2012)

•Community*asked*for:*

•AcPonable*flags*

•providerID*

•Versioning*

•Latent?*

NFIQ 2.0 wish-list as of March 2010 

Components as of March 2012 

 

 
NFIQ*2.0*Community*

Team%Members% Sponsors%

 NIST*(US)*

 BSI*(Germany)*

 BKA*(Germany)*

 Fraunhofer*IGD*

 Hochschule*Darmstadt*/*CASED*

 Secunet*Security*Networks*AG*

 NFIQ*2.0*ParPcipants*

 ...and%the%whole%biometrics%

community%
****

Framework*

Input*/*Output*

Interface*

Quality*Feature*

ExtracPon*Interface*

Image*Format*

Converter*

NFIQ*2.0*Development*

Tools* NFIQ*2.0* Input*/*Output* Module* Quality*Feature* ExtracPon*Module*

UPlity*EsPmaPon*

Module*

Machine*Learning*

Module*

UPlity*EsPmaPon*

Interface*

Machine*Learning*

Interface*

‒ Fingerprint*images*

‒ Quality*features*

‒ Feature*extracPon* ‒ UPlity*computaPon*

‒ Fusion*and*binning*

‒ PredicPon*

‒ Training*

‒ Comparison*scores*

‒ UPlity*Values*

Database* Filesystem* Quality*feature*x* UPlity*x*

MLP**

Architecture*of*NFIQ*2.0*Framework*
NFIQ*2.0*comparison*score*provider*

1F_07_poebva_p2p 1T_02_poebva_p2p id3_07_poebva_p2p pb_02_poebva_p2p

1F_02_poebva_p2p 1Y_07_poebva_p2p id3_02_poebva_p2p R_07_poebva_p2p

1O_07_poebva_p2p 1Y_02_poebva_p2p dermalog_07_poebva_p2p R_02_poebva_p2p

1O_02_poebva_p2p 2B_07_poebva_p2p dermalog_02_poebva_p2p

1T_07_poebva_p2p 2B_02_poebva_p2p pb_07_poebva_p2p

FNMR

0.002

0.005

0.010

0.020

0.050

0.100

0.000010 0.000020 0.000050 0.000100 0.000200 0.000500 0.001000 0.002000 0.005000 0.010000 0.020000 0.050000 0.100000 0.200000

FMR
NFIQ*2.0*features*

Image/signal%processing% MinuAae%based%

» Local*clarity*score* » FingerjetFx*

» Ridge*valley*uniformity* • Open*source*implementaPon*

from*digitalPersona* » OrientaPon*certainty*level* • Digitalpersona.com/fingerjejx » OrientaPon*flow*

» Total*count*of*minuPa*

» Frequency*domain*analysis*

» Count*of*minuPa*in*region*of* » Radial*power*spectrum* interest**

» Gabor*filters*(several*variants)* • Various*selecPon*of*ROI*

Standardized*features*allow*for*plug*and*play*of*feature*computaPon*

implementaPons*that*are*semanPcally*conformant*to*the*standard*(i.e.,*

ISO/IEC*29794M4*and*ISO/IEC*19794M4).*

Different*implementaPons*are*disPnguished*via*providerID.*
NFIQ*2.0*features*

1F 1O 1T 1Y 2B dermalog id3 pb R

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0.25

0.50

0.75

1.00

0

2

4

0.00

0.25

0.50

0.75

1.00

−0.2

−0.1

0.0

0.1

0.0

0.5

1.0

1.5

2.0

0.25

0.50

0.75

1.00

0

1

2

3

4

1

2

3

4

0.0

0.2

0.4

0.6

0.8

0.00

0.25

0.50

0.75

0.00

0.25

0.50

0.75

1.00

0.4

0.5

0.6

0.7

0.8

0.9

ocl rvu32 rps mmb gab msb ruv16 fda lcs gsh of gsg

1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10

Comparison score quantile.

Quality score
NFIQ*2.0*features*M*3*

0.00 0.05 0.10 0.15 0.20 0.25 0.30 

0.07 0.08 0.09 0.10 0.11 

fraction of genuine comparisons rejected 

 Comparator 2B − Dataset poebva − Finger 02 

false non−match rate 

ocl rvu32 rps mmb gab msb rvu16 fda lcs gsh of 
Machine*Learning*

Random%Forest%

» Ensemble*classifier*using*

stochasPc*process*

• Use*vote*to*determine*class*

memberships*

• Provides*class*probability*in*

predicPons*

» Training*

• All*features**

• 4874*samples*in*each*of*the*low*

and*high*performers*classes*

• 1000*trees*in*forest*

» Test*

• 287*895*comparison*scores*

Two%class%predicAon%

» High*vs.**Low*performers*

• 1:*High*performers*are*images*that*

result*in*high*genuine*scores**

• >*CDFM1(0.95)*

• 0:*Low*performers*are*images*that*

result*in*false*reject*

• Threshold*at*FMR=0.0001*

• Quality*score*is*the*probability*that*a*given*

image*belongs*to*class*1.*

» Map*quality*score*to*recogniPon*rate.*
0.00 

1.00 

0.00 1.00 

Probability of sample score > 90th percentile 

1F 1O 1T 1Y 2B dermalog id3 pb R 

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0.25 

0.50 

0.75 

1.00 

0.25 

0.50 

0.75 

0.00 

0.25 

0.50 

0.75 

azla dhs2 poebva 

1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 

Quantile 

NFIQ*2.0*prototype*
NFIQ*2.0*prototype*

0.00 0.05 0.10 0.15 0.20 0.25 0.30 

0.07 0.08 0.09 0.10 0.11 

fraction of genuine comparisons rejected

Comparator 1Y − Dataset all − Finger 02 

false non−match rate 

q nfiq1 

0.00 0.05 0.10 0.15 0.20 0.25 0.30 

0.07 0.08 0.09 0.10 0.11 

fraction of genuine comparisons rejected

Comparator R − Dataset all − Finger 02 

false non−match rate 

q nfiq1 

0.00 0.05 0.10 0.15 0.20 0.25 0.30 

0.07 0.08 0.09 0.10 0.11 

fraction of genuine comparisons rejected

Comparator 1O − Dataset all − Finger 02 

false non−match rate 

q nfiq1 

0.00 0.05 0.10 0.15 0.20 0.25 0.30 

0.07 0.08 0.09 0.10 0.11 

fraction of genuine comparisons rejected

Comparator 2B − Dataset all − Finger 02 

false non−match rate 

q nfiq1 

Enrolment q 

Verification q 

(−0.0176,1.79] 

(1.79,5.17] 

(5.17,10.5] 

(10.5,18.1] 

(18.1,28.2] 

(28.2,39.7] 

(39.7,51.2] 

(51.2,63.3] 

(63.3,75.4] 

(75.4,86.7] 

(86.7,95.5] 

(95.5,100] 

(−0.0176,1.79]

(1.79,5.17](5.17,10.5](10.5,18.1](18.1,28.2](28.2,39.7](39.7,51.2](51.2,63.3](63.3,75.4](75.4,86.7](86.7,95.5]

(95.5,100] 

0.0 

0.1 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

Enrolment q 

Verification q 

(−0.0176,1.79] 

(1.79,5.17] 

(5.17,10.5] 

(10.5,18.1] 

(18.1,28.2] 

(28.2,39.7] 

(39.7,51.2] 

(51.2,63.3] 

(63.3,75.4] 

(75.4,86.7] 

(86.7,95.5] 

(95.5,100] 

(−0.0176,1.79]

(1.79,5.17](5.17,10.5](10.5,18.1](18.1,28.2](28.2,39.7](39.7,51.2](51.2,63.3](63.3,75.4](75.4,86.7](86.7,95.5]

(95.5,100] 

0.4 

0.6 

0.8 

1.0 

1.2 

1.4 

1.6 

Enrolment q 

Verification q 

(−0.019,1.41] 

(1.41,5.05] 

(5.05,10.7] 

(10.7,17.1] 

(17.1,26.3] 

(26.3,36.5] 

(36.5,48.8] 

(48.8,60.8] 

(60.8,74] 

(74,86.1] 

(86.1,95] 

(95,100] 

(−0.019,1.41]

(1.41,5.05](5.05,10.7](10.7,17.1](17.1,26.3](26.3,36.5](36.5,48.8](48.8,60.8]

(60.8,74](74,86.1](86.1,95]

(95,100] 

0.0 

0.1 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

Enrolment q 

Verification q 

(−0.019,1.41] 

(1.41,5.05] 

(5.05,10.7] 

(10.7,17.1] 

(17.1,26.3] 

(26.3,36.5] 

(36.5,48.8] 

(48.8,60.8] 

(60.8,74] 

(74,86.1] 

(86.1,95] 

(95,100] 

(−0.019,1.41]

(1.41,5.05](5.05,10.7](10.7,17.1](17.1,26.3](26.3,36.5](36.5,48.8](48.8,60.8]

(60.8,74](74,86.1](86.1,95]

(95,100] 

0.4 

0.6 

0.8 

1.0 

1.2 

1.4 

1.6 

Enrolment q 

Verification q 

(−0.0185,1.5] 

(1.5,4.77] 

(4.77,9.41] 

(9.41,16] 

(16,25.8] 

(25.8,37.3] 

(37.3,49.7] 

(49.7,63.5] 

(63.5,77] 

(77,88.1] 

(88.1,95.8] 

(95.8,100] 

(−0.0185,1.5]

(1.5,4.77]

(4.77,9.41]

(9.41,16](16,25.8]

(25.8,37.3](37.3,49.7](49.7,63.5]

(63.5,77](77,88.1]

(88.1,95.8]

(95.8,100] 

0.0 

0.2 

0.4 

0.6 

0.8 

1.0 

Enrolment q 

Verification q 

(−0.0185,1.5] 

(1.5,4.77] 

(4.77,9.41] 

(9.41,16] 

(16,25.8] 

(25.8,37.3] 

(37.3,49.7] 

(49.7,63.5] 

(63.5,77] 

(77,88.1] 

(88.1,95.8] 

(95.8,100] 

(−0.0185,1.5]

(1.5,4.77]

(4.77,9.41]

(9.41,16](16,25.8]

(25.8,37.3](37.3,49.7](49.7,63.5]

(63.5,77](77,88.1]

(88.1,95.8]

(95.8,100] 

0.4 

0.6 

0.8 

1.0 

1.2 

1.4 

1.6 

Enrolment q 

Verification q 

(−0.0193,1.53] 

(1.53,4.21] 

(4.21,9.46] 

(9.46,16.8] 

(16.8,25.6] 

(25.6,37.4] 

(37.4,47.7] 

(47.7,59.9] 

(59.9,72.5] 

(72.5,84.9] 

(84.9,94.6] 

(94.6,100] 

(−0.0193,1.53]

(1.53,4.21](4.21,9.46](9.46,16.8](16.8,25.6](25.6,37.4](37.4,47.7](47.7,59.9](59.9,72.5](72.5,84.9](84.9,94.6]

(94.6,100] 

0.1 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

Enrolment q 

Verification q 

(−0.0193,1.53] 

(1.53,4.21] 

(4.21,9.46] 

(9.46,16.8] 

(16.8,25.6] 

(25.6,37.4] 

(37.4,47.7] 

(47.7,59.9] 

(59.9,72.5] 

(72.5,84.9] 

(84.9,94.6] 

(94.6,100] 

(−0.0193,1.53]

(1.53,4.21](4.21,9.46](9.46,16.8](16.8,25.6](25.6,37.4](37.4,47.7](47.7,59.9](59.9,72.5](72.5,84.9](84.9,94.6]

(94.6,100] 

0.4 

0.6 

0.8 

1.0 

1.2 

1.4 

1.6 
AcPonable*quality*

Feed%back%to%user/operator% QuesAons?%

» Wet*/*dry* » Sensor*sensiPvity?*

• High/low*pressure** » Algorithm*sensiPvity?*

» Centeredness » Already*covered*by*features?*

• Singularity*detecPon* » Any*addiPon*or*delePon?*

» Incompleteness*

• Singularity*detecPon*

» Ghost*images*

• Fingerness?*

• Alteredness?*

• correctness*of*phalanx?*
Comparison

scores

Train Self-organizing Train Training set map random forest

Validation

set Activation histogram SOM Codebook

Random forest

Test Predicted 

comparison score Activation histogram set 

NFIQ*2.0*Lite/Mobile*

Requirements% SOM%code%book%

» Low*computaPon*complexity*

• processing*power**

• Processing*Pme*

» Therefore,*feature*computaPon*

not*feasible!*

» Look*up*table?*
0.0025 

0.0000 

0.0025

−

0.0050 −

NFIQ*2.0*Lite*prototype*

Features%

0.0000 

0.0025 

0.0050 

0.0075 

0.0000 

0.0025 

0.0050 

0.0075 

High Lo w 

performance%

0.00 0.05 0.10 0.15 0.20 0.25 0.30 

0.070 0.080 0.090 0.100 

fraction of genuine comparisons rejected 

false non−match rate 

network size 24 network size 32 network size 64 orientationFlow 

0 128 256 384 512 640 768 896 1024 

SOM Unit 0.75 

5 0.70 5

0.65 

4 4 

1 2 3 4 5 

0.60 

0.55 

0.50 

Verification Quality Verification Quality 

3 

1 2 3 4 5 

2.4 

2.2 

2.0

Difference 

0 128 256 384 512 640 768 896 1024 

SOM Unit 

3 

2 0.45 2 

0.40 

1 1 

0.35 

Enrolment Quality Enrolment Quality 

1.4 

1.2 

1.0 

1.8 

1.6 
•

NFIQ*2.0*computaPon*Pme*

Lite%

» ~*65*ms/image*

• PC*M*2.3*GHz*Intel*Core*i7**

• 16*GB*of*memory.**

network*size*of*dim*=*24**

• block*size*of*n*=*24**

• With*gray*scale*normalizaPon*

» ~*82*ms/image.**

• PC*M*2.3*GHz*Intel*Core*i7**

• 16*GB*of*memory.**

• network*size*of*dim*=*24**

• block*size*of*n*=*64**

» This*is*prior*to*any*code*

opPmizaPon*

NFIQ%2.0%

» ~*19.45*msec/image**

• MacBook*Air,*Mid*2011*

• Processor:**1.7*GHz*Intel*Core*i5*

(dual*core)*

• Memory*:*4*GB*1333*MHz*DDR3**

(256*KB*L2*cache,*3MB*L3*cache)*

• Sosware:**OS*X*10.8.3*(12D78)

• for*OCL*M*Expect*about*the*same*

for*other*features*

» ~85*msec/image*

• MinuPa*based*

» This*is*prior*to*any*code*

opPmizaPon*
Current*Status*

Completed%

» Framework*design**

• Modular,*plug*and*play*

» Framework*implementaPon*

» Feature*selecPon*and*prototype*

implementaPon*complete*

• h:p://biometrics.nist.gov/

cs_links/quality/NFIQ_2/

NFIQM2_Quality_Feature_DefinM

Ver05.pdf

» Feature*evaluaPon*complete*

Underway%

» Feature*ImplementaPon*M*MATLAB*to*

to*C/C++**

• Thanks*to*FBI*

» Exploring*machine*learning*

• Random*forest,*SVM.*

» NFIQ*2.0*Lite*

• Self*organizing*map*

» ImplementaPon*of*acPonable*flags*for*

detecPon*and*miPgaPon*of*bad*

presentaPons*

• Incomplete*finger*(Pp,*etc.)*+*Wet*/*dry*

+*Pressure*

» StandardizaPon*of*NFIQ*2.0*feature*

(ISO/IEC*29794M4)*

• Allows*for*plugMandMplay*of*features*for*

implementaPons*that*saPsfy*semanPc*

conformance*to*the*requirements*of*

the*ISO/IEC*29794M4*standard*
NFIQ*2.0*

Promises,%promises% So%far,%we%have%achieved%

» Improved*feature*

» More*level*(0M100)*

» Faster,*lighter*

» AcPonable*feedback*

» NFIQ*2.0*mobile*

» Slap*

» Be:er*performance*

» Modular*design*

» CalibraPon*

» Conformance*tesPng*

» Improved*feature*

» More*level*(0M100)*

» Faster*–*we*hope*

» AcPonable*feedback*

» Towards*NFIQ*Mobile*

» MM*

» Be:er*performance*–*we*hope*

» Plug*and*play**
Coming*up*

1* PublicaPon*of*NFIQ*2.0*Feature*EvaluaPon*(NIST*IR)* June*2013*

2* PublicaPon*of*use*of*machine*learning*techniques*in*NFIQ*2.0*(NIST*IR)* August*2013*

3* Biometric*quality*workshop*at*BCC*2013*M**Tampa,*FL* Sept*17,*1040–1200*

Present*NFIQ*2.0*with*possible*demo*at*NIST*booth* Room*20**

4* StandardizaPon*of*NFIQ*2.0*features*(ISO/IEC*29794M4)* 2015+*
Thank%You.%

Elham*Tabassi*

301*975*5292*

tabassi@nist.gov