Inquiry on MOSIP Biometric Specifications and ICAO Image Standards

Dear MOSIP Team,

I have been reviewing the MOSIP Docs 1.2.0, particularly the section on Biometric Specifications and Biometric Devices , where the requirements for facial image quality are outlined:

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

I have some questions regarding these specifications and would appreciate your clarification.

  1. ICAO Requirements and Device/SBI Responsibility
    Are these image requirements intended to be implemented by the facial capture device and its associated SBI program? Based on my understanding of ICAO standards, the specifications include numerous detailed conditions, such as facial expression, obstruction by hair, use of glasses, headwear, and accessories. These require strict compliance and precise detection. Is the responsibility for enforcing these standards assigned to the capture device and SBI? If so, this seems to present significant technical challenges for devices.
  2. Relationship Between Device/SBI and Bio-SDK
    I understand that the bio-SDK integrated within the registration client performs biometric image quality assessments. How does the quality judgment performed by the bio-SDK relate to that performed by the device/SBI?
    Is it possible for a facial image to be deemed acceptable by the device (meeting the score specified in the capture request), but rejected by the bio-SDK? I believe differences in scoring algorithms may lead to variations, making it unlikely to achieve identical scores.