D Full Palm (“EightInch” Data)

D.1 Bootstrap Confidence for Segmentation Statistics

NOTE: The following segmentation statistics are based on a limited subset (approximately 15%) of the anticipated Full Palm dataset. This analysis will be updated as soon as NIST can obtain the remainder of the dataset.

This section shows the same detailed results of segmentation of EightInch data from Section 5.3, but with an added bootstrap confidence interval. For each observation, a bootstrap routine with 1 000 replicates was run, and a 95 % confidence interval extracted. The lower and upper confidence from that confidence interval are printed in each column within square brackets.

In Table D.1, results are shown of how successful Idemia+0904 segmented fingers for each subject in the test corpus. Table D.2 shows success for specific finger positions over the entire test corpus. Similarly, Table D.3 shows success for segmenting the same finger position from both hands.

The remainder of the tables show success per subject when considering combinations of subsets of the fingers in each slap image. Table D.4 shows success for combinations of all fingers, Table D.6 for the all except the little finger, and Table D.5 for just the index and middle fingers.

Table D.1: For each subject, the percentage that at least Number of Fingers fingers were correctly segmented, regardless of hand, for a maximum of eight correctly-segmented fingers. In Standard Scoring, scoring rules are followed exactly. In Ignoring Bottom Y, the bottom left and bottom right Y coordinates are ignored. Ignoring Bottom X and Y only checks the locations of the top left and top right coordinates. Values in square brackets represent a 95 % confidence interval after bootstrapping with 1 000 replicates.
Number of Fingers Standard Scoring Ignoring Bottom Y Ignoring Bottom X and Y
1 99.1 [98.4, 99.7] 99.1 [98.4, 99.7] 99.1 [98.4, 99.7]
2 98.6 [97.8, 99.3] 98.7 [97.9, 99.4] 98.9 [98.2, 99.5]
3 97.1 [96.0, 98.3] 97.9 [97.0, 98.9] 98.0 [97.0, 99.0]
4 92.4 [90.7, 94.2] 93.4 [91.7, 95.1] 93.7 [92.0, 95.3]
5 89.0 [86.9, 91.0] 89.5 [87.5, 91.6] 89.8 [87.4, 91.7]
6 86.8 [84.4, 89.0] 88.0 [85.9, 90.0] 88.2 [86.0, 90.2]
7 79.0 [76.2, 81.5] 83.7 [81.5, 86.1] 84.8 [82.3, 87.2]
8 57.8 [54.8, 60.9] 67.8 [64.6, 71.1] 69.7 [66.6, 72.5]
Table D.2: For all subjects, Percentage that a particular friction ridge generalized position was correctly segmented. In Ignoring Bottom Y, the bottom left and bottom right Y coordinates are ignored. Ignoring Bottom X and Y only checks the locations of the top left and top right coordinates. Values in square brackets represent a 95 % confidence interval after bootstrapping with 1 000 replicates.
Finger Standard Scoring Ignoring Bottom Y Ignoring Bottom X and Y
Right
Index 92.4 [90.5, 94.1] 93.9 [92.3, 95.4] 94.4 [92.6, 95.7]
Middle 93.9 [92.2, 95.5] 94.1 [92.5, 95.6] 94.5 [92.9, 96.0]
Ring 95.5 [94.0, 96.8] 96.3 [95.1, 97.6] 96.4 [95.2, 97.6]
Little 80.5 [77.8, 83.0] 86.8 [84.1, 89.0] 87.1 [84.8, 89.1]
Left
Index 87.1 [84.8, 89.4] 87.6 [85.2, 89.8] 87.8 [85.7, 89.8]
Middle 85.2 [82.9, 87.7] 85.5 [83.1, 87.7] 86.0 [83.7, 88.3]
Ring 88.9 [86.6, 90.8] 89.4 [87.2, 91.4] 89.8 [87.7, 91.6]
Little 76.3 [73.3, 79.1] 84.6 [82.1, 87.0] 86.1 [83.6, 88.3]
Table D.3: Percentage that a particular type of fingerprint was correctly segmented on Either or Both hands. In Ignoring Bottom Y, the bottom left and bottom right Y coordinates are ignored. Ignoring Bottom X and Y only checks the locations of the top left and top right coordinates. Values in square brackets represent a 95 % confidence interval after bootstrapping with 1 000 replicates.
Fingers Standard Scoring Ignoring Bottom Y Ignoring Bottom X and Y
Index
Either 97.1 [96.1, 98.3] 97.9 [96.9, 98.9] 98.0 [97.0, 99.0]
Both 82.4 [80.0, 85.1] 83.6 [81.1, 86.0] 84.1 [81.6, 86.4]
Middle
Either 97.5 [96.3, 98.5] 97.7 [96.7, 98.6] 97.7 [96.7, 98.6]
Both 81.6 [79.1, 84.0] 82.0 [79.3, 84.6] 82.8 [80.1, 85.2]
Ring
Either 97.7 [96.7, 98.6] 98.0 [97.1, 99.0] 98.2 [97.2, 99.1]
Both 86.7 [84.6, 88.9] 87.7 [85.3, 89.9] 88.0 [86.0, 90.1]
Little
Either 88.4 [86.1, 90.5] 92.6 [90.9, 94.3] 93.1 [91.4, 94.6]
Both 68.4 [65.4, 71.6] 78.7 [76.0, 81.5] 80.1 [77.5, 82.8]
Table D.4: Percentage of segmentation success by hand for combinations of all eight fingers of a EightInch slap. In Ignoring Bottom Y, the bottom left and bottom right Y coordinates are ignored. Ignoring Bottom X and Y only checks the locations of the top left and top right coordinates. Values in square brackets represent a 95 % confidence interval after bootstrapping with 1 000 replicates.
Fingers Standard Scoring Ignoring Bottom Y Ignoring Bottom X and Y
Right
Any 98.0 [93.8, 95.8] 98.2 [93.9, 96.0] 98.2 [94.0, 96.0]
At Least Two 96.3 [92.3, 94.5] 96.8 [92.6, 94.9] 97.1 [92.6, 95.1]
At Least Three 93.8 [89.1, 91.8] 94.9 [90.2, 92.9] 95.3 [90.8, 93.3]
All Four 74.1 [68.9, 73.2] 81.3 [76.8, 80.6] 81.8 [78.2, 82.0]
Left
Any 91.6 [93.8, 95.8] 91.8 [93.9, 96.0] 91.8 [94.0, 96.0]
At Least Two 90.6 [92.3, 94.5] 90.7 [92.6, 94.9] 90.7 [92.6, 95.1]
At Least Three 87.1 [89.1, 91.8] 88.3 [90.2, 92.9] 88.9 [90.8, 93.3]
All Four 68.2 [68.9, 73.2] 76.3 [76.8, 80.6] 78.3 [78.2, 82.0]
Table D.5: Percentage of segmentation success by hand when only considering combinations of index and middle fingers. In Ignoring Bottom Y, the bottom left and bottom right Y coordinates are ignored. Ignoring Bottom X and Y only checks the locations of the top left and top right coordinates. Values in square brackets represent a 95 % confidence interval after bootstrapping with 1 000 replicates.
Fingers Standard Scoring Ignoring Bottom Y Ignoring Bottom X and Y
Right
Either Index or Middle 97.2 [92.4, 94.8] 97.4 [92.8, 95.1] 97.5 [93.0, 95.2]
Both Index and Middle 89.1 [84.0, 87.2] 90.7 [84.9, 88.2] 91.4 [85.7, 88.9]
Left
Either Index or Middle 90.1 [92.4, 94.8] 90.5 [92.8, 95.1] 90.6 [93.0, 95.2]
Both Index and Middle 82.2 [84.0, 87.2] 82.6 [84.9, 88.2] 83.2 [85.7, 88.9]
Table D.6: Percentage of segmentation success by hand when only considering combinations of index, middle, and ring fingers. In Ignoring Bottom Y, the bottom left and bottom right Y coordinates are ignored. Ignoring Bottom X and Y only checks the locations of the top left and top right coordinates. Values in square brackets represent a 95 % confidence interval after bootstrapping with 1 000 replicates.
Fingers Standard Scoring Ignoring Bottom Y Ignoring Bottom X and Y
Right
Any 97.7 [93.5, 95.5] 97.9 [93.8, 95.7] 97.9 [93.6, 95.9]
At Least Two 95.9 [91.0, 93.6] 96.3 [91.5, 93.9] 96.8 [91.9, 94.3]
All Three 88.3 [82.9, 86.3] 90.1 [84.4, 87.5] 90.6 [84.9, 88.1]
Left
Any 91.4 [93.5, 95.5] 91.6 [93.8, 95.7] 91.6 [93.6, 95.9]
At Least Two 88.9 [91.0, 93.6] 89.2 [91.5, 93.9] 89.4 [91.9, 94.3]
All Three 80.9 [82.9, 86.3] 81.7 [84.4, 87.5] 82.5 [84.9, 88.1]

D.2 Jaccard Index

Boxplot of Jaccard similarity indices as compared to the traditional success metrics. Outliers have been removed for clarity.

Figure D.1: Boxplot of Jaccard similarity indices as compared to the traditional success metrics. Outliers have been removed for clarity.

Boxplot of Jaccard similarity indices for each friction ridge generalized position. Outliers have been removed for clarity.

Figure D.2: Boxplot of Jaccard similarity indices for each friction ridge generalized position. Outliers have been removed for clarity.

Table D.7: For each subject, the percentage that at least Number of Fingers fingers were segmented with a Jaccard index in the indicated range.
Number of Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95
1 99.1 99.1 99.1 97.2 9.7 0.5
2 99.0 99.0 98.4 92.5 1.4 0
3 98.5 98.2 97.4 86.6 0.2 0
4 94.7 94.0 92.4 77.7 0.1 0
5 90.3 89.9 89.0 66.4 0 0
6 89.0 88.0 85.7 51.8 0 0
7 86.9 84.8 78.9 32.6 0 0
8 78.6 73.4 62.2 12.6 0 0
Table D.8: For all subjects, percentage that a particular friction ridge generalized position was segmented with a Jaccard index in the indicated range.
Finger 0-0.5 0.5-0.6 0.6-0.7 0.7-0.8 0.8-0.9 0.9-1.0
Right
Index 4.0 0.4 3.2 28.6 62.9 0.9
Middle 2.8 0.3 0.8 15.9 77.3 2.9
Ring 2.7 0.9 1.5 15.2 76.9 2.8
Little 10.6 3.7 7.2 33.8 44.2 0.5
Left
Index 11.0 0.5 1.5 28.2 58.0 0.8
Middle 10.0 0.1 1.6 15.3 71.8 1.2
Ring 9.2 0.6 0.9 16.0 71.2 2.1
Little 13.6 3.2 6.7 32.5 43.7 0.3
Table D.9: Percentage of segmentation obtaining a Jaccard index in the indicated ranges, by hand, for combinations of all ten fingers of a EightInch slap.
Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95
Right
Any 98.4 98.4 98.2 92.5 6.6 0.3
At Least Two 97.6 97.2 96.2 82.3 0.5 0.0
At Least Three 96.7 95.7 93.0 63.1 0.0 0.0
All Four 87.2 83.2 74.5 30.5 0.0 0.0
Left
Any 91.8 91.8 91.5 87.4 3.8 0.1
At Least Two 90.9 90.7 90.1 79.0 0.6 0.0
At Least Three 89.5 89.0 87.6 57.0 0.0 0.0
All Four 83.9 80.3 72.0 25.9 0.0 0.0
Table D.10: Percentage of segmentation obtaining a Jaccard index in the indicated ranges, by hand, for combinations of index and middle fingers of a EightInch slap.
Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95
Right
Either Index or Middle 97.8 97.6 97.0 86.2 3.7 0.3
Both Index and Middle 95.4 94.9 91.5 57.8 0.1 0
Left
Either Index or Middle 90.6 90.5 90.0 81.7 2.0 0
Both Index and Middle 88.4 87.9 85.3 50.1 0 0
Table D.11: Percentage of segmentation obtaining a Jaccard index in the indicated ranges, by hand, for combinations of index, middle, and ring fingers of a EightInch slap.
Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95
Right
Any 97.9 97.7 97.6 91.5 6.1 0.3
At Least Two 97.5 97.1 95.5 79.4 0.5 0
All Three 95.1 94.0 90.2 52.8 0 0
Left
Any 91.6 91.5 91.3 86.7 3.6 0.1
At Least Two 89.9 89.7 88.7 74.0 0.5 0
All Three 88.3 87.5 84.6 44.5 0 0