Effects of Sitting and Supine Positions on Tongue Color as Measured by Tongue Image Analyzing System and Its Relation to Biometric Information
Table 2
Color difference between the sitting and supine positions (n = 18).
No.
(,,)
ΔL′
ΔC′
ΔH′
ΔE00
Sitting position
Supine position
1
(52.5, 28.6, 4.2)
(54.0, 29.6, 6.6)
1.47
1.46
2.26
2.1
2
(41.6, 29.4, 3.2)
(40.4, 30.2, 2.4)
−1.20
0.82
−0.93
1.3
3
(40.5, 25.5, 0.7)
(41.1, 29.3, 4.0)
0.58
4.43
3.02
2.7
4
(36.0, 23.9, 2.4)
(43.5, 25.1, 5.3)
7.49
1.78
2.64
6.8
5
(44.5, 29.8, 4.5)
(47.7, 31.5, 7.6)
3.24
2.35
2.70
3.7
6
(46.1, 22.2, 6.7)
(45.6, 24.3, 6.2)
−0.46
2.22
−1.09
1.3
7
(42.1, 20.5, 2.7)
(47.6, 23.3, 4.7)
5.51
3.67
1.50
5.6
8
(38.6, 30.0, 5.8)
(39.3, 27.6, 4.1)
0.70
2.74
1.26
1.5
9
(35.9, 28.2, 3.0)
(35.2, 30.9, 4.1)
−0.67
2.95
0.80
1.4
10
(47.3, 26.1, 8.3)
(45.9, 29.0, 9.6)
−1.41
3.36
0.42
2.0
11
(46.4, 28.9, 10.1)
(43.8, 30.5, 9.8)
−2.60
1.43
−0.73
2.6
12
(43.0, 24.2, 5.7)
(38.6, 26.5, 5.0)
−4.38
2.43
−1.17
4.1
13
(38.8, 32.5, 6.9)
(36.5, 34.3, 7.2)
−2.27
1.88
−0.07
2.1
14
(42.1, 28.0, 8.7)
(38.2, 30.3, 8.2)
−3.94
1.89
−0.98
3.6
15
(50.0, 27.3, 8.3)
(43.9, 29.4, 7.5)
−6.09
2.01
−1.39
6.1
16
(41.2, 29.4, 5.0)
(40.6, 31.4, 5.8)
−0.60
2.29
0.42
1.1
17
(42.1, 23.6, 3.5)
(44.5, 26.2, 4.1)
2.36
3.04
0.24
2.5
18
(44.6, 25.3, 4.8)
(44.3, 26.1, 5.2)
−0.30
1.02
0.17
0.5
for lightness (brightness to darkness), for chromaticity (redness [+a] to greenness [−a], and for chromaticity (yellowness [+b] to blueness [−b)]). ΔL′: lightness difference, ΔC′: chromaticity difference, ΔH′: hue difference, ΔE00: color difference.
