Databases Reference
In-Depth Information
value will be required to shift away from the ideal color and that the majority of color transitions
toward the nonideal colors will be compressed into the regions closest to the edges of the window
or the nonideal regions.
The two-color mapping schemes are illustrated in Table 5.9. If the sample application is run,
notice that it takes much longer for the logarithmic mapping scheme to deviate from the ideal color
(green), whereas the linear mapping scheme shifts equidistant increments of color over the entire range.
TABLE 5.9
Linear vs. Log Color Map Schemes
Linear
Log
Deviation from Ideal
80
80
1.000
81
81
0.950
82
82
0.900
83
83
0.850
84
84
0.800
85
85
0.750
86
86
0.700
87
87
0.650
88
88
0.600
89
89
0.550
90
90
0.500
91
91
0.450
92
92
0.400
93
93
0.350
94
94
0.300
95
95
0.250
96
96
0.200
97
97
0.150
98
98
0.100
99
99
0.050
100
100
0.000
101
101
0.050
102
102
0.100
103
103
0.150
104
104
0.200
105
105
0.250
106
106
0.300
107
107
0.350
108
108
0.400
109
109
0.450
110
110
0.500
111
111
0.550
112
112
0.600
113
113
0.650
114
114
0.700
115
115
0.750
116
116
0.800
117
117
0.850
118
118
0.900
119
119
0.950
120
120
1.000
