D.3.3 Implementation of the Grayscale Standard Display Function
The measured Characteristic Curve is interpolated for the available DDLs yielding 256 Luminance levels LI,m. The Grayscale Standard Display Function is also interpolated between JNDmin and JNDmax (DJND = [JNDmax - JNDmin]/255) yielding 256 Standard Luminance levels LI,STD.
For every LI,STD, the closest LJ,m is determined. The data pair I,J defines the transformation between Dinput and Doutput (Table D.3-1 and Figure D.3-2) by which the Luminance response of the Display System is made to approximates the Grayscale Standard Display Function.
Table D.3-1. Look-Up Table for Calibrating Reflection Hardcopy System
P-Value
|
DDL
|
|
P-Value
|
DDL
|
|
P-Value
|
DDL
|
|
P-Value
|
DDL
|
0
|
6
|
|
1
|
9
|
|
2
|
12
|
|
3
|
15
|
4
|
18
|
|
5
|
20
|
|
6
|
27
|
|
7
|
29
|
8
|
30
|
|
9
|
31
|
|
10
|
31
|
|
11
|
32
|
12
|
33
|
|
13
|
33
|
|
14
|
34
|
|
15
|
36
|
16
|
38
|
|
17
|
40
|
|
18
|
41
|
|
19
|
42
|
20
|
43
|
|
21
|
44
|
|
22
|
45
|
|
23
|
59
|
24
|
60
|
|
25
|
61
|
|
26
|
62
|
|
27
|
62
|
28
|
63
|
|
29
|
63
|
|
30
|
64
|
|
31
|
64
|
32
|
65
|
|
33
|
65
|
|
34
|
65
|
|
35
|
66
|
36
|
66
|
|
37
|
67
|
|
38
|
67
|
|
39
|
68
|
40
|
70
|
|
41
|
74
|
|
42
|
75
|
|
43
|
76
|
44
|
78
|
|
45
|
84
|
|
46
|
85
|
|
47
|
86
|
48
|
87
|
|
49
|
87
|
|
50
|
88
|
|
51
|
89
|
52
|
89
|
|
53
|
91
|
|
54
|
92
|
|
55
|
94
|
56
|
95
|
|
57
|
96
|
|
58
|
97
|
|
59
|
97
|
60
|
98
|
|
61
|
99
|
|
62
|
99
|
|
63
|
100
|
64
|
101
|
|
65
|
102
|
|
66
|
103
|
|
67
|
104
|
68
|
105
|
|
69
|
106
|
|
70
|
107
|
|
71
|
108
|
72
|
109
|
|
73
|
110
|
|
74
|
112
|
|
75
|
114
|
76
|
116
|
|
77
|
118
|
|
78
|
119
|
|
79
|
120
|
80
|
121
|
|
81
|
122
|
|
82
|
122
|
|
83
|
123
|
84
|
123
|
|
85
|
124
|
|
86
|
125
|
|
87
|
125
|
88
|
126
|
|
89
|
126
|
|
90
|
127
|
|
91
|
127
|
92
|
128
|
|
93
|
129
|
|
94
|
130
|
|
95
|
131
|
96
|
133
|
|
97
|
134
|
|
98
|
135
|
|
99
|
136
|
100
|
136
|
|
101
|
137
|
|
102
|
138
|
|
103
|
138
|
104
|
139
|
|
105
|
139
|
|
106
|
140
|
|
107
|
141
|
108
|
143
|
|
109
|
145
|
|
110
|
147
|
|
111
|
148
|
112
|
149
|
|
113
|
150
|
|
114
|
151
|
|
115
|
152
|
116
|
153
|
|
117
|
154
|
|
118
|
154
|
|
119
|
155
|
120
|
156
|
|
121
|
156
|
|
122
|
157
|
|
123
|
158
|
124
|
159
|
|
125
|
160
|
|
126
|
160
|
|
127
|
162
|
128
|
163
|
|
129
|
164
|
|
130
|
165
|
|
131
|
166
|
132
|
167
|
|
133
|
168
|
|
134
|
169
|
|
135
|
170
|
136
|
170
|
|
137
|
171
|
|
138
|
172
|
|
139
|
172
|
140
|
173
|
|
141
|
174
|
|
142
|
175
|
|
143
|
175
|
144
|
176
|
|
145
|
177
|
|
146
|
178
|
|
147
|
179
|
148
|
179
|
|
149
|
180
|
|
150
|
181
|
|
151
|
182
|
152
|
182
|
|
153
|
183
|
|
154
|
184
|
|
155
|
184
|
156
|
185
|
|
157
|
186
|
|
158
|
186
|
|
159
|
187
|
160
|
187
|
|
161
|
188
|
|
162
|
188
|
|
163
|
189
|
164
|
189
|
|
165
|
190
|
|
166
|
190
|
|
167
|
190
|
168
|
191
|
|
169
|
191
|
|
170
|
192
|
|
171
|
192
|
172
|
192
|
|
173
|
193
|
|
174
|
194
|
|
175
|
194
|
176
|
195
|
|
177
|
195
|
|
178
|
196
|
|
179
|
197
|
180
|
198
|
|
181
|
199
|
|
182
|
199
|
|
183
|
200
|
184
|
200
|
|
185
|
201
|
|
186
|
202
|
|
187
|
202
|
188
|
203
|
|
189
|
203
|
|
190
|
204
|
|
191
|
204
|
192
|
205
|
|
193
|
205
|
|
194
|
206
|
|
195
|
207
|
196
|
207
|
|
197
|
208
|
|
198
|
209
|
|
199
|
210
|
200
|
211
|
|
201
|
212
|
|
202
|
213
|
|
203
|
214
|
204
|
214
|
|
205
|
215
|
|
206
|
216
|
|
207
|
216
|
208
|
217
|
|
209
|
218
|
|
210
|
219
|
|
211
|
219
|
212
|
220
|
|
213
|
220
|
|
214
|
221
|
|
215
|
222
|
216
|
222
|
|
217
|
223
|
|
218
|
223
|
|
219
|
224
|
220
|
224
|
|
221
|
225
|
|
222
|
226
|
|
223
|
226
|
224
|
227
|
|
225
|
228
|
|
226
|
228
|
|
227
|
230
|
228
|
231
|
|
229
|
232
|
|
230
|
234
|
|
231
|
235
|
232
|
236
|
|
233
|
238
|
|
234
|
238
|
|
235
|
239
|
236
|
240
|
|
237
|
241
|
|
238
|
242
|
|
239
|
242
|
240
|
243
|
|
241
|
244
|
|
242
|
245
|
|
243
|
246
|
244
|
247
|
|
245
|
248
|
|
246
|
249
|
|
247
|
250
|
248
|
250
|
|
249
|
251
|
|
250
|
251
|
|
251
|
252
|
252
|
252
|
|
253
|
253
|
|
254
|
253
|
|
255
|
254
|