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118 lines
5.8 KiB
PostScript
118 lines
5.8 KiB
PostScript
%%
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%% Here is some Postscript for setting the gamma values using table lookup
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%%
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%% These tables don't do anything currently. Its a straight 1-1 mapping.
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%%
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%% But maybe somebody will figure out some tables if I provide the template :-)
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%%
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%% This is for fooling around with color correction. None of the
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%% values in this file are tuned for the 2300 DL yet. So far, I
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%% have not come across a *process* for determining what should go
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%% into this file.
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%%
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%% This defines a set of four PS procedures, one for each of C, M, Y, and K,
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%% whose input is a value in the range 0.0..1.0, and whose output should be
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%% a corrected value in the same range.
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%%
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%%
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%% Lookup table for Cyan
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%%
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/c_lut [
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%The first value is for the level 0 (darker) %levels...
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 %0 ... 15
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16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 %16 ... 31
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32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 %32 ... 47
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48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 %48 ... 63
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64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 %64 ... 79
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80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 %80 ... 95
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96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 %96 ... 111
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112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 %112 ... 127
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128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 %128 ... 143
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144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 %144 ... 159
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160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 %160 ... 175
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176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 %176 ... 191
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192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 %192 ... 207
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208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 %208 ... 223
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224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 %224 ... 239
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240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 %240 ... 255
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%The last value is for level 255 (lighter).
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] def
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%%
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%% Lookup table for Magenta
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%%
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/m_lut [
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%The first value is for the level 0 (darker) %levels...
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 %0 ... 15
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16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 %16 ... 31
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32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 %32 ... 47
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48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 %48 ... 63
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64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 %64 ... 79
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80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 %80 ... 95
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96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 %96 ... 111
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112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 %112 ... 127
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128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 %128 ... 143
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144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 %144 ... 159
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160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 %160 ... 175
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176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 %176 ... 191
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192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 %192 ... 207
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208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 %208 ... 223
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224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 %224 ... 239
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240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 %240 ... 255
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%The last value is for level 255 (lighter).
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] def
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%%
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%% Lookup table for Yellow
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%%
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/y_lut [
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%The first value is for the level 0 (darker) %levels...
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 %0 ... 15
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16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 %16 ... 31
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32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 %32 ... 47
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48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 %48 ... 63
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64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 %64 ... 79
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80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 %80 ... 95
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96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 %96 ... 111
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112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 %112 ... 127
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128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 %128 ... 143
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144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 %144 ... 159
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160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 %160 ... 175
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176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 %176 ... 191
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192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 %192 ... 207
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208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 %208 ... 223
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224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 %224 ... 239
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240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 %240 ... 255
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%The last value is for level 255 (lighter).
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] def
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%%
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%% Lookup table for Black
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%%
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/k_lut [
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%The first value is for the level 0 (darker) %levels...
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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 %0 ... 15
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16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 %16 ... 31
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32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 %32 ... 47
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48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 %48 ... 63
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64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 %64 ... 79
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80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 %80 ... 95
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96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 %96 ... 111
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112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 %112 ... 127
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128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 %128 ... 143
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144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 %144 ... 159
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160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 %160 ... 175
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176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 %176 ... 191
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192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 %192 ... 207
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208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 %208 ... 223
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224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 %224 ... 239
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240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 %240 ... 255
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%The last value is for level 255 (lighter).
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] def
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{255 mul 0.5 add cvi c_lut exch get 255 div}
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{255 mul 0.5 add cvi m_lut exch get 255 div}
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{255 mul 0.5 add cvi y_lut exch get 255 div}
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{255 mul 0.5 add cvi k_lut exch get 255 div}
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setcolortransfer
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