INCITS/ISO/IEC 19794-3 : 2007

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.