Biometric Specification

Introduction

Biometrics images for various modalities are represented and exchanged as per the below specifications.

Change History

Date
Changes

7th May 2021

NFIQ v2.0 has been removed from the supported quality score for fingerprint authentication device

Image formats

Fingerprint

Refer ISO 19794-4:2011 Specifications.

Factor
Registration Devices
Authentication Devices

Image Specification

ISO 19794-4:2011 Annex B1

ISO 19794-4:2011 Annex B2

Minimum Resolution

>= 500 native DPI. Higher densities are preferred.

>= 500 native DPI.

Minimum Active Platen Area or Capture area*

>=1.6 x 1.5 inches for 1 to 2 fingers >=3.2 x 2.0 inches for 4 fingers

>=0.5 x 0.65 inches*

Greyscale Density

8 bits (256 grey levels)

8 bits (256 grey levels)

Image Format

JPEG 2000 Lossless

JPEG 2000 Lossy or WSQ

Compression Ratio

Lossless

Up to 15:1

Quality Score

NFIQ v2.0

NFIQ v1.0

Capture Mode

Auto Capture

Auto Capture

Preview

> 3 FPS M-JPEG frames with NFIQ 2.0 score superimposed

Not Applicable

ESD

>= 8kv

>= 8kv

EMC Compliance

FCC class A or equivalent

FCC class A or equivalent

Operating Temperature*

0 to 50 °C

0 to 50 °C

FTM**

SBI 1.0 - Use host based security (and above)

SBI 2.0 - FTM supported security

* MOSIP adopters can change this if needed. ** Please refer SBI specification documentation.

Iris

RRefer to ISO 19794-6:2011 Specifications.

Factor
Registration Devices
Authentication Devices

Image Specification

ISO 19794-6:2011 Annex B

ISO 19794-6:2011 Annex B

Minimum Iris Diameter

>=210 pixels

>=150 pixels

Grey Scale Density

8 bits (256 grey levels)

8 bits (256 grey levels)

Spatial Resolution

>=60% @ 2Lp/mm

>= 50% @ 1Lp/mm

Pixel Resolution

>10 pixels/mm

>10 pixels/mm

Capture Distance

>=10CM

>=10CM

Imaging Wavelength

Approximately 700-900 nm

Approximately 700-900 nm

Illumination

The eye should be illuminated using infrared or any other source that could produce high-quality gray scale image

The eye should be illuminated using infrared or any other source that could produce high-quality gray scale image

Image Format

IMAGE_TYPE_VGA (K2) OR IMAGE_TYPE_CROPPED (K3)

IMAGE_TYPE_CROPPED_AND_MASKED (K7)

Compression

JPEG 2000 Lossless

JPEG 2000 Lossy

Compression Ratio

Lossless

Up to 15:1 (>= 3.5 KB)

Aspect Ratio

1:1

1:1

Capture Mode

Auto Capture

Auto Capture

Scan Type

Progressive

Progressive

Preview

>= 3 FPS M-JPEG frames with quality score superimposed

Not Applicable

EMC compliance

FCC Class A or equivalent

FCC Class A or equivalent

Operating Temperature*

0 to 50 °C

0 to °50 C

FTM**

SBI 1.0 - Use host-based security (and above)

SBI 2.0 - FTM supported security

* MOSIP adopters can change this if needed. ** Please refer SBI specification documentation.

Face Capture

Refer ISO 19794-5:2011 Specifications.

Factor
Registration Devices
Authentication Devices

Image Specification

ISO/IEC 19794-5:2011

ISO/IEC 19794-5:2011

Camera Specification

1080p with 90 degree FoV or above

720p or above

Skin Tone

All

All

Exception Image Specification

Full Frontal with FACE features, two palms next to the face, waist up photo. 60mm(width) X 40mm(height)

Not Applicable

Image quality

ICAO - Full frontal image, +/- 5 degrees rotation, 24 bit RGB, white background 35 mm(width) X 45mm(height)

ICAO is not mandated

Image format

JPEG 2000 Lossless

JPEG 2000 Lossy

Compression Ratio

Lossless

Up to 15:1

EMC compliance

FCC Class A or equivalent

FCC Class A or equivalent

Operation Temperature*

0 to 50 °C

0 to 50 °C

FTM**

SBI 1.0 - Use host based security (and above)

SBI 2.0 - FTM supported security

* MOSIP adopters can change this if needed. ** Please refer SBI specification documentation.

Capture Time across modalities should be less than 4 Seconds (time taken for providing a final capture response to the calling application, when the biometrics are well placed on the sensors)

We recommend that countries look at ergonomics, accessibility, ease of usage, and common availability of devices while choosing devices for use in registration and authentication scenarios.

XML Container

The biometric data is wrapped in CBEFF XML.

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