5 FBI Laboratory

The results of Section 5 are based on searches of the sequestered dataset FBI Laboratory. This dataset consists of 49 operational latent distal phalanx probes. Members of the FBI manually annotated the probe images and confirmed the ground truth mate. All probes searched were a single sample depicting a region from a distal phalanx. EFS data provided with the probe image may include:

  • Pattern classification
  • Minutia locations (unconfirmed source)

5.1 Failures

Table 5.1 shows the number of failures to create templates. Table 5.2 shows the number of failures to produce a candidate list.

Table 5.1: Number of failures to create templates.
Image Type Content Failures Attempts
Exemplar Image 0 38
Probe Image + EFS 0 49
Probe Image 0 49
Table 5.2: Number of failures to produce a candidate list. This number includes any failures to create a probe template from Table 5.1.
Distractor Imp. Probe Content Failures Attempts
Plain Image 0 49
Roll Image 0 49
Plain Image + EFS 0 49
Roll Image + EFS 0 49

5.2 CMC Plots

The CMC plots in Figure 5.1 show the FNIR of dermalog+0002 when searching FBI Laboratory against enrollment database where a single mated identity for each search probe was present. The plots are faceted by the distractor impression type and whether probe EFS data was provided. Tabular versions of FNIR at select ranks can be viewed in Table 5.3.

CMC when searching FBI Laboratory probes, faceted by distractor impression type and whether probe EFS data was provided.

Figure 5.1: CMC when searching FBI Laboratory probes, faceted by distractor impression type and whether probe EFS data was provided.

5.3 CMC Table

The values in Table 5.3 correspond to Figure 5.1.

Table 5.3: Region FNIR values from CMC plotted in Figure 5.1.
Distractor Imp. Probe Content Rank 1 Rank  ≤ 50 Rank  ≤ 100
Plain Image 0.5306 0.2857 0.2857
Roll Image 0.4490 0.3061 0.2653
Plain Image + EFS 0.7551 0.4898 0.4898
Roll Image + EFS 0.6531 0.4490 0.4490

5.4 DET Plots

The DET plots in Figure 5.2 show the false positive and false negative identification rate tradeoffs of dermalog+0002 when searching FBI Laboratory against enrollment database where a single mated identity for each search probe was present. The plots are faceted by the distractor impression type and whether probe EFS data was provided. Tabular versions of FNIR at select FPIR can be viewed in Table 5.4.

DET when searching FBI Laboratory probes, faceted by the distractor impression type and whether probe EFS data was provided.

Figure 5.2: DET when searching FBI Laboratory probes, faceted by the distractor impression type and whether probe EFS data was provided.

5.5 DET Table

The values in Table 5.4 correspond to Figure 5.2.

Table 5.4: Region FNIR values corresponding to FPIR plotted in Figure 5.2.
Distractor Imp. Probe Content FPIR = 0.01 FPIR = 0.02 FPIR = 0.1
Plain Image 0.3714 0.3143 0.2286
Roll Image 0.2778 0.2500 0.0833
Plain Image + EFS 0.6800 0.6000 0.4800
Roll Image + EFS 0.7407 0.6296 0.5185