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Code Editor : gamma-lookup.ps

%%
%% Here is some Postscript for setting the gamma values using table lookup
%%
%% These tables don't do anything currently.  Its a straight 1-1 mapping.
%%
%% But maybe somebody will figure out some tables if I provide the template :-)
%%
%% This is for fooling around with color correction.  None of the
%% values in this file are tuned for the 2300 DL yet.  So far, I
%% have not come across a *process* for determining what should go
%% into this file.
%%
%% This defines a set of four PS procedures, one for each of C, M, Y, and K,
%% whose input is a value in the range 0.0..1.0, and whose output should be
%% a corrected value in the same range.
%%

%%
%% Lookup table for Cyan
%%
/c_lut [
%The first value is for the level 0 (darker)			%levels...
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15				%0 ... 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32			%16 ... 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47			%32 ... 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63			%48 ... 63
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79			%64 ... 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95			%80 ... 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111	%96 ... 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127	%112 ... 127
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143	%128 ... 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159	%144 ... 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175	%160 ... 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191	%176 ... 191
192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207	%192 ... 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223	%208 ... 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239	%224 ... 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255	%240 ... 255
%The last value is for level 255 (lighter).
] def

%%
%% Lookup table for Magenta
%%
/m_lut [
%The first value is for the level 0 (darker)			%levels...
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15				%0 ... 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32			%16 ... 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47			%32 ... 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63			%48 ... 63
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79			%64 ... 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95			%80 ... 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111	%96 ... 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127	%112 ... 127
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143	%128 ... 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159	%144 ... 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175	%160 ... 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191	%176 ... 191
192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207	%192 ... 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223	%208 ... 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239	%224 ... 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255	%240 ... 255
%The last value is for level 255 (lighter).
] def

%%
%% Lookup table for Yellow
%%
/y_lut [
%The first value is for the level 0 (darker)			%levels...
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15				%0 ... 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32			%16 ... 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47			%32 ... 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63			%48 ... 63
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79			%64 ... 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95			%80 ... 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111	%96 ... 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127	%112 ... 127
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143	%128 ... 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159	%144 ... 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175	%160 ... 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191	%176 ... 191
192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207	%192 ... 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223	%208 ... 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239	%224 ... 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255	%240 ... 255
%The last value is for level 255 (lighter).
] def

%%
%% Lookup table for Black
%%
/k_lut [
%The first value is for the level 0 (darker)			%levels...
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15				%0 ... 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32			%16 ... 31
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47			%32 ... 47
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63			%48 ... 63
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79			%64 ... 79
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95			%80 ... 95
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111	%96 ... 111
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127	%112 ... 127
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143	%128 ... 143
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159	%144 ... 159
160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175	%160 ... 175
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191	%176 ... 191
192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207	%192 ... 207
208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223	%208 ... 223
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239	%224 ... 239
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255	%240 ... 255
%The last value is for level 255 (lighter).
] def
{255 mul 0.5 add cvi c_lut exch get 255 div}
{255 mul 0.5 add cvi m_lut exch get 255 div}
{255 mul 0.5 add cvi y_lut exch get 255 div}
{255 mul 0.5 add cvi k_lut exch get 255 div}
setcolortransfer

${this.title}

Code Editor : gamma-lookup.ps