Image Processing Reference
In-Depth Information
TABLE 6.6 (continued)
Example of a Printer Forward Map (CMY to L*a*b*)
C
M
Y
L*
a*
b*
85
85
85
67.73
7.81
5.02
85
85
170
67.82
2.65
32.37
85
85
255
66.72
1.31
61.35
85
170
0
56.67
40.60
28.83
85
170
85
57.40
31.75
0.64
85
170
170
57.65
27.53
23.35
85
170
255
56.89
25.47
47.26
85
255
0
42.76
70.00
30.95
85
255
85
44.53
62.14
6.25
85
255
170
45.45
57.65
13.12
85
255
255
45.60
54.93
30.82
170
0
0
66.30
29.96
41.98
170
0
85
65.11
39.47
9.95
170
0
170
64.37
44.19
18.92
170
0
255
63.69
46.42
49.90
170
85
0
54.01
1.44
43.99
170
85
85
54.92
11.56
14.10
170
85
170
54.96
16.24
11.53
170
85
255
53.84
18.73
37.31
45.74
170
170
0
44.03
23.42
170
170
85
45.67
13.91
17.88
170
170
170
45.60
9.06
5.44
170
170
255
45.80
6.20
26.89
170
255
0
32.07
53.10
47.14
170
255
85
34.28
44.77
22.91
170
255
170
35.64
40.48
3.57
170
255
255
36.49
37.66
13.50
255
0
0
54.56
38.18
55.13
255
0
85
54.79
51.25
24.05
255
0
170
54.76
57.79
4.20
255
0
255
54.54
61.72
34.77
255
85
0
44.41
12.50
55.51
255
85
85
45.39
24.51
27.21
255
85
170
45.94
30.78
2.37
255
85
255
46.10
34.92
23.72
255
170
0
35.67
11.46
56.40
255
170
85
37.20
0.42
30.48
255
170
170
38.40
5.71
7.77
255
170
255
39.12
10.12
14.22
255
255
0
24.98
42.17
57.67
255
255
85
26.99
33.01
35.15
255
255
170
28.80
27.68
16.30
255
255
255
30.04
23.55
1.02
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