# 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 | {% hint style="info" %} \* MOSIP adopters can change this if needed.\ \*\* Please refer [SBI specification documentation](broken://pages/-MQrs4fU2j_hVIXun-BX). {% endhint %} ### 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 | {% hint style="info" %} \* MOSIP adopters can change this if needed.\ \*\* Please refer [SBI specification documentation](broken://pages/-MQrs4fU2j_hVIXun-BX). {% endhint %} ### 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 | {% hint style="info" %} \* MOSIP adopters can change this if needed.\ \*\* Please refer [SBI specification documentation](broken://pages/-MQrs4fU2j_hVIXun-BX). {% endhint %} {% hint style="info" %} *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)* {% endhint %} 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](/1.1.5/biometrics/cbeff-xml.md). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.mosip.io/1.1.5/biometrics/biometric-specification.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.