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.
Figure D.3-2. Transformation for modifying the Characteristic Curve of the printer to a Display Function that 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 |