6 Certification flag MF MV 0x00 (was: Facial images shall be compressed using a compression ratio no higher than 15:1. However, when facial images)
All changes in this version
Title changed
Before · SP 800-76-1
Facial images shall be compressed using a compression ratio no higher than 15:1. However, when facial images
After · SP 800-76-2
Facial images shall be compressed using a compression ratio no higher than 15:1.Certification However,flag whenMF facialMV images0x00
Control changed
Before · SP 800-76-1
are stored on PIV Cards JPEG 2000 should be used with ROI compression. The innermost region should be centered on the face and compressed at no more than 24:1. 7. Face recognition performance is a function of the spatial resolution of the image. [FACESTD] does not specify a minimum resolution for the Full Frontal Image Type. For PIV, faces shall be acquired such that a 20 centimeter target placed on, and normal to, a camera's optical axis at a range of 1.5 meters shall be imaged with at least 240 pixels across it. This ensures that the width of the head (i.e. dimension CC in Figure 8 of [FACESTD]) shall have sufficient resolution for the printed face element of the PIV Card. This specification and Section 8.3.4 of [FACESTD] implies that the image width shall exceed 420 pixels. This resolution specification shall be attained optically without digital interpolation. The distance from the camera to the subject should be greater than or equal to 1.5 meters (for distortion reasons discussed in [FACESTD, Annex A.8]). The size specification is a minimum: When images are to be used for automated face recognition higher resolution is likely to yield lower error rates. 8. Facial image data shall be converted to the sRGB color space if it is stored. As stated in Section 7.4.3.3 of [FACESTD] this requires application of the color profile associated with the camera in use. 6. Common header for PIV biometric data
All PIV biometric data shall be embedded in a data structure conforming to Common Biometric Exchange Formats Framework [CBEFF]. This specifies that all biometric data shall be digitally signed and uniformly encapsulated. This covers: the PIV Card fingerprints mandated by [FIPS]; any other biometric data agencies elect to place on PIV Cards; any biometric records that agencies elect to retain (including purely proprietary, or derivative, elements); and any biometric data retained by, or for, agencies or Registration Authorities. The EFTS transaction data described in section 3.6 is exempt. All such data shall be signed in the same manner as prescribed in [FIPS 201] and [800-73] for the mandatory biometric elements. The signature is present for integrity and shall be stored in the CBEFF signature block. The overall arrangement is depicted in Table 7.
Table 7: Simple CBEFF structure
CBEFF STRUCTURE CBEFF_HEADER CBEFF_BIOMETRIC_RECORD CBEFF_SIGNATURE_BLOCK Section 6 Sections 3.4, 3.5 and 5.2 FIPS 201 INCITS 398 5.2.1 INCITS 398 5.2.2 INCITS 398 5.2.3
The CBEFF Header specified in Table 8 and its notes will be established by NIST as Patron Format "PIV". This format will be established as a formal Patron Format per the provisions of [CBEFF, 6.2]. It adds definitive data types and the FASC-N field mandated by [FIPS] to a subset of the fields given in Patron Format A [CBEFF, Annex A]. It exists independently of Patron Format A. All fields of the format are mandatory.
Table 8: Patron format PIV specification
Patron Format PIV Field (Numbers in parentheses are [CBEFF] clause numbers) Length Bytes Data Type PIV Conformance Required Value
After · SP 800-76-2
are stored on PIV Cards JPEG 2000 should be used with ROI compression. The innermost region should be centered on the face and compressed at no more than 24:1. 7. Face recognition performance is a function of the spatial resolution of the image. [FACESTD] does not specify a minimum resolution for the Full Frontal Image Type. For PIV, faces shall be acquired such that a 20 centimeter target placed on, and normal to, a camera's optical axis at a range of 1.5 meters shall be imaged with at least 240 pixels across it. This ensures that the width of the head (i.e. dimension CC in Figure 8 of [FACESTD]) shall have sufficient resolution for the printed face element of the PIV Card. This specification and Section 8.3.4 of [FACESTD] implies that the image width shall exceed 420 pixels. This resolution specification shall be attained optically without digital interpolation. The distance from the camera to the subject should be greater than or equal to 1.5 meters (for distortion reasons discussed in [FACESTD, Annex A.8]). The size specification is a minimum: When images are to be used for automated face recognition higher resolution is likely to yield lower error rates. 8. Facial image data shall be converted to the sRGB color space if it is stored. As stated in Section 7.4.3.3 of [FACESTD] this requires application of the color profile associated with the camera in use. 6. Common header for PIV biometric data
All PIV biometric data shall be embedded in a data structure conforming to Common Biometric Exchange Formats Framework [CBEFF]. This specifies that all biometric data shall be digitally signed and uniformly encapsulated. This covers: the PIV Card fingerprints mandated by [FIPS]; any other biometric data agencies elect to place on PIV Cards; any biometric records that agencies elect to retain (including purely proprietary, or derivative, elements); and any biometric data retained by, or for, agencies or Registration Authorities. The EFTS transaction data described in section 3.6 is exempt. All such data shall be signed in the same manner as prescribed in [FIPS 201] and [800-73] for the mandatory biometric elements. The signature is present for integrity and shall be stored in the CBEFF signature block. The overall arrangement is depicted in Table 7.
Table 7: Simple CBEFF structure
CBEFF STRUCTURE CBEFF_HEADER CBEFF_BIOMETRIC_RECORD CBEFF_SIGNATURE_BLOCK Section 6 Sections 3.4, 3.5 and 5.2 FIPS 201 INCITS 398 5.2.1 INCITS 398 5.2.2 INCITS 398 5.2.3
The CBEFF Header specified in Table 8 and its notes will be established by NIST as Patron Format "PIV". This format will be established as a formal Patron Format per the provisions of [CBEFF, 6.2]. It adds definitive data types and the FASC-N field mandated by [FIPS] to a subset of the fields given in Patron Format A [CBEFF, Annex A]. It exists independently of Patron Format A. All fields of the format are mandatory.
Table 8: Patron format PIV specification
Patron Format PIV Field (Numbers in parentheses are [CBEFF] clause numbers) Length Bytes Data Type PIV Conformance Required Value