2 Timing Sample Dataset

A fixed sample of images randomly selected from the PFT III datasets are used to assess whether or not an implementation adheres to the minimum timing requirements set forth in the PFT III test plan. This sample is also used to provide an estimate on template size. The images and comparisons are identical to the “1K Sample Evaluation” from NIST’s PFT II evaluation, with the exception of the “IARPA N2N” dataset, which is new in PFT III. Table 2.1 shows information about the maximum dimensions and resolutions of the images in each of the timing sample datasets.

Table 2.1: Maximum dimensions in pixels and capture resolution in pixels per inch (PPI) for the images in each of the subsets comprising the timing sample dataset.
AZ LA County DHS 2 POE+BVA IARPA N2N
Max Dimensions (pixels) 800 x 800 412 x 1 000 368 x 368 500 x 500 1 600 x 1 500
Resolution (PPI) 500 500 500 500 1 000

2.1 Template Size

Figure 2.1 and Table 2.2 show the distribution of file sizes of templates. Failures of any kind reported during template generation result in NIST code writing 0 byte files. These files are excluded from the template size analysis in this section.

Box plots of template sizes in bytes of templates created from a fixed sample of data from the PFT III evaluation. An overall plot is shown, as well as individual plots per data origin. Tabular versions of this data are shown in Table 2.2.

Figure 2.1: Box plots of template sizes in bytes of templates created from a fixed sample of data from the PFT III evaluation. An overall plot is shown, as well as individual plots per data origin. Tabular versions of this data are shown in Table 2.2.

Table 2.2: Sizes in bytes of templates created from a fixed sample of data from the PFT III evaluation. The bottom row, Failures, shows the number of failures to create a template, which are not included in these statistics. Box plots of this data are shown in Figure 2.1.
Overall AZ LA County DHS 2 POE+BVA IARPA N2N
Min 601 10 709 601 601 1 133 9 379
25 % 14 433 27 201 24 009 12 305 12 039 27 201
Median 22 413 28 797 27 201 14 433 14 167 27 201
Mean 21 885 30 729 25 770 14 458 14 299 28 747
75 % 27 201 33 319 27 201 16 827 16 295 29 329
Max 68 431 54 067 45 289 26 935 27 201 68 431
Failures 0 0 0 0 0 0

2.2 Template Creation Time

Figure 2.2 and Table 2.3 show the distribution of durations of time consumed when creating templates. Failures of all kinds are incorporated into these statistics, since this time would be observed by the end user of a template creation algorithm.

Times are measured by running a single process on an isolated compute node equipped with an Intel Xeon Gold 6254 CPU.

Box plots of elapsed milliseconds when creating templates from a fixed sample of data from the PFT III evaluation. All times are used, even if a failure occurred. Tabular versions of this data are shown in Table 2.3.

Figure 2.2: Box plots of elapsed milliseconds when creating templates from a fixed sample of data from the PFT III evaluation. All times are used, even if a failure occurred. Tabular versions of this data are shown in Table 2.3.

Table 2.3: Elapsed milliseconds when creating templates from a fixed sample of data from the PFT III evaluation. All times are used, even if a failure occurred. The bottom row, Failures, shows the number of failures to generate a template. Failures are included in these statistics. Box plots of this data are shown in Figure 2.2.
Overall AZ LA County DHS 2 POE+BVA IARPA N2N
Min 164.7 403.6 206.5 164.7 188.4 374.3
25 % 323.3 586.1 473.4 293.9 295.8 569.5
Median 455.4 604.6 499.0 317.4 322.8 572.1
Mean 451.8 625.3 490.8 318.0 327.3 589.2
75 % 580.2 653.1 516.1 343.1 355.3 595.7
Max 1 096.4 881.3 696.3 453.9 495.0 1 096.4
Failures 0 0 0 0 0 0

2.3 Template Comparison Time

Figure 2.3 and Table 2.4 show the distribution of durations of time consumed when comparing templates. Failures of any kind are incorporated into these statistics, since this time would be observed by the end user of a template comparison algorithm.

Times are measured by running a single process on an isolated compute node equipped with an Intel Xeon Gold 6254 CPU.

Box plots of elapsed microseconds when comparing two templates from a fixed sample of data from the PFT III evaluation. All times are used, even if a failure occurred. Tabular versions of this data are shown in Table 2.4.

Figure 2.3: Box plots of elapsed microseconds when comparing two templates from a fixed sample of data from the PFT III evaluation. All times are used, even if a failure occurred. Tabular versions of this data are shown in Table 2.4.

Table 2.4: Elapsed microseconds when comparing two templates from a fixed sample of data from the PFT III evaluation. The bottom row, Failures, shows the number of failures to compare. Failures are included in these statistics. Box plots of this data are shown in Figure 2.4.
Overall AZ LA County DHS 2 POE+BVA IARPA N2N
Min 112.4 365.9 238.8 112.4 142.1 257.1
25 % 504.6 951.3 822.2 444.8 459.8 452.0
Median 871.7 1 279.8 1 038.4 590.1 697.6 522.4
Mean 1 108.2 1 760.3 1 373.8 762.7 924.3 713.8
75 % 1 444.8 2 497.5 2 008.7 1 053.8 1 368.7 789.2
Max 62 466.0 62 466.0 6 350.2 2 564.4 3 672.9 4 722.5
Failures 0 0 0 0 0 0