C Upper Palm (“FiveInch” Data)

C.1 Bootstrap Confidence for Segmentation Statistics

This section shows the same detailed results of segmentation of FiveInch data from Section 4.3, 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 C.1, results are shown of how successful dermalog+0002 segmented fingers for each subject in the test corpus. Table C.2 shows success for specific finger positions over the entire test corpus. Similarly, Table C.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 C.4 shows success for combinations of all fingers, Table C.6 for the all except the little finger, and Table C.5 for just the index and middle fingers.

Table C.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 [98.3, 99.6] 99.1 [98.4, 99.7] 99.1 [98.3, 99.7]
2 97.6 [96.4, 98.7] 97.6 [96.4, 98.7] 97.8 [96.7, 98.8]
3 94.7 [93.1, 96.3] 94.7 [93.0, 96.3] 94.9 [93.1, 96.3]
4 91.2 [89.2, 93.1] 91.8 [89.9, 93.7] 92.4 [90.3, 94.2]
5 83.7 [80.8, 86.2] 84.3 [81.7, 86.7] 84.5 [81.7, 87.2]
6 75.4 [72.1, 78.4] 76.0 [73.0, 79.1] 77.1 [74.3, 80.1]
7 61.7 [58.2, 64.8] 63.1 [59.7, 66.8] 65.3 [61.9, 68.8]
8 37.8 [34.3, 41.4] 38.7 [35.2, 42.3] 42.4 [38.7, 46.2]
Table C.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 83.8 [81.2, 86.4] 83.9 [81.4, 86.4] 84.0 [81.4, 86.4]
Middle 83.0 [80.1, 85.8] 83.2 [80.5, 85.8] 84.0 [81.5, 86.7]
Ring 84.7 [81.8, 87.2] 86.0 [83.5, 88.4] 87.0 [84.6, 89.2]
Little 79.1 [76.3, 82.0] 79.4 [76.5, 82.2] 82.3 [79.5, 85.1]
Left
Index 80.9 [77.9, 83.4] 81.0 [78.2, 83.8] 81.7 [78.9, 84.4]
Middle 80.9 [77.9, 83.7] 81.6 [78.8, 84.4] 81.8 [79.0, 84.7]
Ring 83.6 [80.8, 86.1] 85.1 [82.5, 87.5] 85.5 [83.0, 88.1]
Little 70.3 [66.8, 73.6] 70.3 [67.0, 73.7] 72.1 [68.8, 75.1]
Table C.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 93.3 [91.3, 95.1] 93.4 [91.6, 95.1] 93.5 [91.8, 95.3]
Both 70.1 [66.8, 73.0] 70.2 [66.9, 73.3] 70.9 [67.5, 74.2]
Middle
Either 92.8 [90.9, 94.5] 92.9 [91.0, 94.6] 93.0 [91.2, 94.7]
Both 69.8 [66.7, 72.9] 70.6 [67.6, 73.6] 71.5 [68.5, 74.6]
Ring
Either 94.1 [92.4, 95.7] 95.0 [93.4, 96.4] 95.3 [93.7, 96.7]
Both 72.9 [69.7, 76.0] 74.8 [71.7, 77.9] 75.9 [72.9, 78.8]
Little
Either 91.8 [90.0, 93.8] 91.8 [89.9, 93.7] 92.6 [90.6, 94.6]
Both 56.4 [52.7, 59.6] 56.7 [52.7, 60.3] 60.6 [57.0, 64.0]
Table C.4: Percentage of segmentation success by hand for combinations of all eight fingers of a FiveInch 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 95.5 [94.8, 96.8] 95.5 [94.8, 96.9] 95.5 [95.0, 96.9]
At Least Two 91.0 [87.8, 91.0] 91.0 [88.2, 91.2] 91.0 [88.2, 91.4]
At Least Three 80.9 [78.1, 82.3] 81.5 [78.6, 82.7] 82.6 [79.4, 83.7]
All Four 63.3 [55.2, 60.2] 64.6 [56.4, 61.5] 68.4 [59.5, 64.3]
Left
Any 96.2 [94.8, 96.8] 96.3 [94.8, 96.9] 96.6 [95.0, 96.9]
At Least Two 87.9 [87.8, 91.0] 88.6 [88.2, 91.2] 88.7 [88.2, 91.4]
At Least Three 79.4 [78.1, 82.3] 80.0 [78.6, 82.7] 80.6 [79.4, 83.7]
All Four 52.1 [55.2, 60.2] 53.2 [56.4, 61.5] 55.3 [59.5, 64.3]
Table C.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 91.2 [88.9, 92.0] 91.2 [89.0, 91.8] 91.2 [88.8, 91.9]
Both Index and Middle 75.5 [71.6, 76.0] 75.9 [72.3, 76.6] 76.9 [73.3, 77.6]
Left
Either Index or Middle 89.5 [88.9, 92.0] 89.5 [89.0, 91.8] 89.5 [88.8, 91.9]
Both Index and Middle 72.3 [71.6, 76.0] 73.1 [72.3, 76.6] 74.0 [73.3, 77.6]
Table C.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 93.8 [92.4, 94.9] 93.8 [92.8, 95.0] 93.8 [92.6, 95.2]
At Least Two 86.4 [83.5, 87.1] 86.7 [83.9, 87.5] 87.0 [84.1, 87.6]
All Three 71.3 [66.9, 71.6] 72.7 [68.5, 73.2] 74.3 [69.9, 74.3]
Left
Any 93.6 [92.4, 94.9] 94.0 [92.8, 95.0] 94.2 [92.6, 95.2]
At Least Two 84.1 [83.5, 87.1] 84.7 [83.9, 87.5] 85.0 [84.1, 87.6]
All Three 67.6 [66.9, 71.6] 69.0 [68.5, 73.2] 69.9 [69.9, 74.3]

C.2 Jaccard Index

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

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

Table C.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 ≥0.98
1 99.5 99.5 99.5 99.1 94.2 44.1 25.6
2 98.4 98.4 98.4 97.5 79.8 20.7 17.8
3 96.0 96.0 95.4 94.5 61.0 14.0 13.3
4 94.6 94.2 93.0 89.9 38.1 10.0 9.9
5 87.9 87.4 86.2 80.8 20.3 6.5 6.5
6 81.3 80.6 79.4 70.6 9.6 4.9 4.9
7 73.3 73.0 71.5 57.6 4.7 4.0 4.0
8 65.3 63.8 59.7 35.7 2.9 2.9 2.9
Table C.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 11.6 0.5 1.1 3.6 37.2 46.0
Middle 12.0 0.8 1.5 6.9 39.2 39.6
Ring 10.6 0.1 1.1 4.3 33.4 50.5
Little 11.2 0.3 0.9 10.1 48.9 28.6
Left
Index 15.2 0.3 0.7 5.0 35.7 43.1
Middle 14.3 0.8 1.8 6.0 32.1 45.0
Ring 11.5 0.5 0.7 4.4 38.1 44.8
Little 11.7 0.1 2.1 17.8 52.8 15.5
Table C.9: Percentage of segmentation obtaining a Jaccard index in the indicated ranges, by hand, for combinations of all ten fingers of a FiveInch slap.
Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95 ≥0.98
Right
Any 96.9 96.9 96.8 96.4 84.2 28.7 19.3
At Least Two 92.8 92.7 92.4 90.0 50.8 13.0 11.7
At Least Three 86.2 86.0 84.6 80.1 21.8 7.6 7.6
All Four 78.7 77.3 74.6 57.0 8.0 5.2 5.2
Left
Any 97.5 97.5 97.1 95.6 77.7 29.7 18.6
At Least Two 90.6 90.2 89.3 86.7 45.6 11.3 10.9
At Least Three 83.3 83.2 82.6 75.1 19.5 7.6 7.4
All Four 75.9 74.7 71.2 49.6 5.6 4.8 4.8
Table C.10: Percentage of segmentation obtaining a Jaccard index in the indicated ranges, by hand, for combinations of index and middle fingers of a FiveInch slap.
Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95 ≥0.98
Right
Either Index or Middle 93.5 93.4 93.0 91.4 64.6 21.9 16.5
Both Index and Middle 83.0 81.8 79.7 70.7 21.0 7.7 7.4
Left
Either Index or Middle 90.6 90.6 90.3 88.3 63.3 24.4 15.9
Both Index and Middle 79.8 78.8 76.5 67.5 24.8 7.6 7.4
Table C.11: Percentage of segmentation obtaining a Jaccard index in the indicated ranges, by hand, for combinations of index, middle, and ring fingers of a FiveInch slap.
Fingers ≥0.5 ≥0.6 ≥0.7 ≥0.8 ≥0.9 ≥0.95 ≥0.98
Right
Any 95.5 95.3 94.9 94.0 79.3 27.0 18.4
At Least Two 89.5 89.4 88.6 85.6 42.3 12.2 11.0
All Three 80.9 79.7 77.3 66.4 14.6 6.5 6.5
Left
Any 95.2 95.0 94.3 93.1 74.9 28.6 17.9
At Least Two 86.3 86.2 85.7 82.6 41.9 10.9 10.5
All Three 77.3 76.1 74.1 63.0 16.0 6.5 6.4