BS ISO/IEC 19794-3:2006

Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Symbols and abbreviated terms
6 Data conventions
   6.1 Byte and bit ordering
   6.2 Coordinate system
   6.3 Greyscale precision
   6.4 Image polarity
   6.5 Angle direction of rotation
   6.6 Phase and propagation angles
7 Determination of finger pattern spectral data
   7.1 Overview
   7.2 Step 0) [Optional] Image pre-processing
   7.3 Step 1) Cellular partitioning
   7.4 Step 2) Spectral component selection
       7.4.1 Quantized co-sinusoidal triplets
       7.4.2 Discrete Fourier Transform
       7.4.3 Gabor filters
   7.5 Quality
8 Finger pattern spectral data record
   8.1 Record header
       8.1.1 Format identifier
       8.1.2 Version number
       8.1.3 Length of record
       8.1.4 Number of single finger records
       8.1.5 x (horizontal) resolution
       8.1.6 y (vertical) resolution
       8.1.7 Number of cells in x-direction
       8.1.8 Number of cells in y-direction
       8.1.9 Number of pixels in cells in x-direction
       8.1.10 Number of pixels in cells in y-direction
       8.1.11 Number of pixels between cell centres in x-direction
       8.1.12 Number of pixels between cell centres in y-direction
       8.1.13 Spectral component selection method
       8.1.14 Type of window
       8.1.15 Standard deviation
       8.1.16 Number of frequencies
       8.1.17 Frequencies
       8.1.18 Number of orientations
       8.1.19 Number of spectral components to be retained per cell
       8.1.20 Bit-depth of propagation angle of co-sinusoidal
              function
       8.1.21 Bit-depth of wavelength of co-sinusoidal function
       8.1.22 Bit-depth of phase
       8.1.23 Bit-depth of magnitude
       8.1.24 Bit-depth of quality score
       8.1.25 Cell quality group granularity
       8.1.26 Reserved bytes
  8.2 Single finger record
       8.2.1 Header
       8.2.2 Finger pattern spectral data block
       8.2.3 Extended data block
  8.3 Summary of finger pattern spectral data record
9 Finger pattern spectral data card format
Annex A (informative) Finger pattern spectral data
                      record examples - quantized
                      co-sinusoidal triplet spectral
                      component selection method
A.1 Example 1
A.2 Example 2
A.3 Size comparisons
Annex B (informative) Finger pattern spectral data record
                      examples - Discrete Fourier Transform
                      spectral component selection method
B.1 Example 1
B.2 Example 2
Annex C (informative) Finger pattern spectral data record
                      example - Gabor filter spectral
                      component selection method
Bibliography

Describes the interchange format for the exchange of spectral-based fingerprint data.

This part of ISO/IEC 19794 specifies the interchange format for the exchange of spectral-based fingerprint data.