update on the application of photo standards in the e-mrtd ... · part 1 of icao doc 9303...
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Update on the Application of Photo Standards in the E-MRTD Issuing Process
Update on the Application of Photo Standards in the E-MRTD Issuing Process
Dr. Uwe Seidel Senior Scientist, Bundeskriminalamt, Germany
New Technology Working Group (NTWG)TAG/MRTD 18
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� Part 1 of ICAO Doc 9303 references the specifications set out in ISO/IEC 19794-5, Biometric Data Interchange Format - Face Image Data, for the compliance of biometrically suitable passport images.
� Experiences of various issuing authorities that have applied these specifications suggest that a number of key specifications within in the ISO/IEC 19794-5 Standard may need to be modified.
� The NTWG was given approval at TAG-17 to give immediate consideration to identifying potential solutions, including revised practices and/or tolerance adjustments, to ensure that issuing agencies are able to meet specifications for “Biometric Data Interchange Format - Face Image Data” within Part 1 of ICAO Doc 9303.
Introduction Introduction
� At its meeting in Tel Aviv, January 2008, the subcommittee ISO/JTC1/SC37 agreed on the Technical Corrigendum to the ISO/IEC 19794-5 standard “Biometric Data Interchange Formats – Part 5: Face Image Data”.
� It is now forwarded to ISO publication.� This Technical Corrigendum reflects the analysis and the
recommendations given by the NTWG work group at TAG/MRTD-17 in 2007.
Current Status Current Status
New ISO 19794-5 limits and tolerancesNew ISO 19794-5 limits and tolerances
0,90,750,70,55+INFNew – Max0,60,50,50,4590 pxNew – Min0,80,710,70,5+INFOld – Max0,70,50,50,590 pxOld – Min
Head HeightRatio
HeadWidthRatio
Relative Vertical
Position*
Relative Horizontal Position
Eye Distance
Limits
� The Corrigendum calls for relaxing the tolerance in head roll (tilt) to ±8°. The tolerances for the deviations from the frontal pose in the pitch- and the yaw-axis remain unchanged at ±5°.
The Pose IssueThe Pose Issue
Images with head roll angle of ±8°
� The modifications set out in the Technical Corrigendum to ISO/IEC 19794-5 will be backward compatible with the earlier provisions of ISO/IEC 19794-5 since only the normative requirements will be relaxed; best practice requirements remain unchanged and are strongly recommended for the application in the e-passport framework.
� This ensures that issuing authorities and/or photographers do not have to change their already-published photo requirements which are based on the best practice requirements of the earlier version of ISO/IEC 19794-5.
� Also, issuing authorities will now be able to accept more of thesubmitted photographs without degrading facial recognition performance.
Backward compatibility Backward compatibility
Backward compatibility contd.Backward compatibility contd.
ISO 19794-5 strict values
Newlowerlimit
Newupperlimit
Old and new best practiserequirements; unchanged
New normative requirements
No photo guidelines or policies have to be changed!It leads to less rejections in the application process!
Do we (still) have a problem? Do we (still) have a problem?
�Analysed 31 DG2-images from e-passport reference samples (from 31 countries)
�58% JPEG, 42% JPEG2000 image format used
�58% Full Frontal Image, 35% Token Frontal Image Type
�Average file size is 16.852 Bytes.
E-passport Image Analysis E-passport Image Analysis
Image Analysis – File Size Image Analysis – File Size
0
5.000
10.000
15.000
20.000
25.000
30.000
AUSAUTBELCHECZEDNK D ESPESTFINFRAGBRHUN IR
LIS
LJPN LIELTULUXLVANLDNOR
NZLPOLPRTRUSSGPSVKSVNSW
EUSA
country
file
size
[byt
es]
Average DG2 File Size = 16.852 Bytes
Image Analysis – Dimensions Image Analysis – Dimensions
200
250
300
350
400
450
500
550
600
650
700
AUSAUTBELCHECZEDNK D ESPEST FINFRAGBRHUN
IRL
ISL
JPN LIE
LTULUXLVANLDNOR
NZLPOLPRTRUSSGPSVKSVNSW
EUSA
country
imag
e d
imen
sio
n [
pix
el]
Image Width
Image Height
Image Analysis – Eye Distance Image Analysis – Eye Distance
0
20
40
60
80
100
120
140
160
AUSAUTBELCHECZEDNK D ESPESTFINFRAGBRHUN IR
LIS
LJPN LIELTULUXLVANLDNOR
NZLPOLPRTRUSSGPSVKSVNSW
EUSA
country
eye
dis
tanc
e [p
ixel
]
Image Analysis – Head Height Image Analysis – Head Height
0,000
0,100
0,200
0,300
0,400
0,500
0,600
0,700
0,800
0,900
1,000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
country (might be a diffe rent order as before !)
hea
d im
age
hei
gh
t ra
tio
Token Frontal Image Typeother tolerances apply
Token Frontal Image Typeother tolerances apply
Image Analysis – Head Width Image Analysis – Head Width
0,000
0,100
0,200
0,300
0,400
0,500
0,600
0,700
0,800
0,900
1,000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
country (might be a different orde r as before!)
hea
d im
age
wid
th r
atio
Token Frontal Image Typeother tolerances apply
� Analysis shows, that the relaxed tolerances are needed for a smooth e-passport issuing process.
� The NTWG welcomes the adjustments made to the standard ISO/IEC 19794-5, closely following its own analysis and recommendations.
� The way these adjustments are made guarantees solid ground, backward compatibility for already issued MRTDs.
� The NTWG will monitor the application of the modified photo standards to the issuance of passports with biometrically suitable passport images and report any new developments to TAG/MRTD.
Conclusions Conclusions
The NTWG invites the TAG/MRTD
� To acknowledge the adjustments made by a Technical Corrigendum to the standard ISO/IEC 19794-5, Biometric Data Interchange Format - Face Image Data, affecting the according reference of Part 1 of ICAO Doc 9303 (6th Edition) for passport photographs.
� To approve the continuation of on-going research in this area.
Actions by the TAG Actions by the TAG
