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Computer-Assisted Facial Image Identification System, Tables 1-5, by Yoshino, Matsuda, Kubota, Imaizumi, and Miyasaka (Forensic Science Communications, January 2001)

January 2001 - Volume 3 - Number 1

Tables 1 – 5

Computer-Assisted Facial Image Identification System
Mineo Yoshino, Hideaki Matsuda, Satoshi Kubota,
Kazuhiko Imaizumi, and Sachio Miyasaka

Table 1.

Anthropometrical Data for the 3D and 2D
Facial Images in Figure 4

Anthropometric points	Reference numbers	Distance (mm)		Anthropometric points	Reference numbers	Angle (degree)
Anthropometric points	Reference numbers	3D	2D	Anthropometric points	Reference numbers	3D	2D
al-al	5-6	38.4	38.4	al-sto-al	5-8-6	63.0	62.9
ch-ch	9-10	39.1	38.5	al-gn-al	5-15-6	28.7	28.3
sn-gn	7-15	67.0	66.5	ch-sn-ch	9-7-10	73.9	77.7
sto-gn	8-15	45.3	45.7	ch-gn-ch	9-15-10	48.1	46.2
go-sba	13-17	151.7	149.1	go-gn-sba	13-15-17	90.1	88.2

al = alare; sto = stomion; ch = cheilion; gn = gnathion; sn = subnasale; go = gonion; and sba = subaurale.

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Table 2.

Reciprocal Point-to-Point Difference Between the
3D and 2D Facial Images in Figure 6

Anthropometric point	Reference number	Distance (mm)	Anthropometric point	Reference number	Distance (mm)
Anthropometric point	Reference number	Distance (mm)	Anthropometric point	Reference number	Distance (mm)
r-en	1	2.0	r-ch	9	0.9
l-en	2	0.9	l-ch	10	1.3
r-ex	3	3.2	r-zy	11	2.5
l-ex	4	1.4	r-go	13	0.6
r-al	5	1.4	gn	15	1.8
l-al	6	1.8	l-sa	16	3.8
sn	7*	0	l-sba	17	3.4
sto	8	2.0	l-t	18	3.6

Mean = 1.9; SD = 1.1; Min = 0; and Max = 3.8. r-en = right entocanthion;
r-ch = right cheilion; l-en = left entocanthion; l-ch = left cheilion; r-ex = right ectocanthion; r-zy = right zygion; l-ex = left ectocanthion; r-go = right gonion; r-al = right alare; gn = gnathion; l-al = left alare; l-sa = left superaurale; sn = subnasale; l-sba = left subaurale; sto = stomion; l-t = left tragion. * = standard.

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Table 3.

Descriptive Statistics for the Average Distance of the
Reciprocal Points Between the 3D and 2D
Facial Images of the Same Person (N = 25)

E	n	Mean	SD	Distance (mm)		E	n	Mean	SD	Distance (mm)
E	n	Mean	SD	Min	Max	E	n	Mean	SD	Min	Max
1	10	2.0	0.3	1.5	2.6	14	10	2.4	0.2	2.0	2.8
2	10	2.1	0.3	1.9	2.6	15	10	2.6	0.2	2.3	2.8
3	10	2.5	0.2	2.2	3.0	16	10	2.3	0.3	1.8	2.7
4	10	2.4	0.3	2.4	3.0	17	10	2.5	0.2	2.3	2.9
5	10	2.6	0.3	1.9	3.0	18	10	2.2	0.3	1.5	2.6
6	10	2.2	0.2	2.0	2.6	19	10	2.5	0.3	1.9	3.0
7	10	2.1	0.3	1.7	2.8	20	10	2.6	0.3	2.2	3.1
8	10	2.6	0.3	2.3	3.3	21	10	2.2	0.2	1.9	2.4
9	10	2.3	0.2	1.8	2.6	22	10	2.1	0.2	1.8	2.5
10	10	2.1	0.3	1.5	2.4	23	10	2.4	0.2	1.9	2.7
11	10	2.7	0.2	2.2	3.0	24	10	2.4	0.3	2.0	2.8
12	10	2.3	0.5	1.7	1.7	25	10	1.9	0.3	1.4	2.3
13	10	2.5	0.5	3.1	3.1

E = examinee.

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Table 4.

Descriptive Statistics for the Average Distance of the
Reciprocal Points Between the 3D and 2D
Facial Images in the Same and Different Persons

Superimposition Image	n	Mean	SD	Distance (mm)
Superimposition Image	n	Mean	SD	Min	Max
Same person	250	2.3	0.4	1.4	3.3
Different person	600	4.7	1.0	2.6	7.0

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Table 5.

Assessment of the Propriety of the Threshold for
Identifying the 2D and 3D Facial Images
(Target: Examinee 2)

Examinee	Average distance	Examinee	Average distance
Examinee	Average distance	Examinee	Average distance
1	3.6	14	5.8
2	2.2	15	4.5
3	4.1	16	4.3
4	4.6	17	4.6
5	3.1	18	3.7
6	3.6	19	3.0
7	4.2	20	3.6
8	5.0	21	4.3
9	5.8	22	3.6
10	4.0	23	4.3
11	4.2	24	4.5
12	4.1	25	3.9
13	4.1

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01.03.11

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