explore the PDFium CMYK_to_sRGB

Author: svgeesus

css-color-4/workings/MacBeth-PDFium.txt

@@ -0,0 +1,27 @@
+rgb(0.411765,0.266667,0.207843)
+rgb(0.745098,0.537255,0.466667)
+rgb(0.309804,0.447059,0.580392)
+rgb(0.278431,0.380392,0.215686)
+rgb(0.462745,0.466667,0.662745)
+rgb(0.313726,0.752941,0.670588)
+
+rgb(0.874510,0.482353,0.168627)
+rgb(0.227451,0.380392,0.678431)
+rgb(0.772549,0.313726,0.364706)
+rgb(0.305882,0.184314,0.392157)
+rgb(0.572549,0.741176,0.282353)
+rgb(0.894118,0.607843,0.156863)
+
+rgb(0.105882,0.270588,0.611765)
+rgb(0.192157,0.584314,0.298039)
+rgb(0.709804,0.121569,0.203922)
+rgb(0.925490,0.764706,0.149020)
+rgb(0.725490,0.321569,0.596078)
+rgb(0.043137,0.505882,0.603922)
+
+rgb(0.949020,0.945098,0.925490)
+rgb(0.733333,0.752941,0.752941)
+rgb(0.572549,0.584314,0.588235)
+rgb(0.411765,0.423529,0.427451)
+rgb(0.262745,0.274510,0.286275)
+rgb(0.101961,0.109804,0.125490)

css-color-4/workings/Macbeth.txt

@@ -21,6 +21,12 @@ xicclu -ff -ir PSOcoated_v3.icc
 
 sRGB2 is lab2 converted to sRGB.
 
+f39 is FOGRA39 CMYK
+TAC 300%
+xicclu -fb -ir Coated_Fogra39L_VIGC_300.icc
+
+gRGB is f39 CMYK converted to sRGB with PDFium AdobeCMYK_to_sRGB
+
 sample calculation:
 
 mr_lab=[51.711, 47.694, 16.857]
@@ -40,158 +46,198 @@ Array(3) [ 0.795503737776, 0.19912581837599996, 0.473224735209 ]
 
 ========================= data below ========================
 
+row 1
+
 dark skin
 lab     38.358 13.802 14.646
 lch     38.358, 20.124624716997833, 46.6993622491831
 sRGB    0.45870209092590125, 0.32007132252023746, 0.26381334009797147
 pso     0.324832 0.599138 0.602548 0.485780
+f39     0.204222 0.534465 0.568083 0.584089
 nRGB    0.34718488896, 0.20613125764000007, 0.20437776744000002
 lab2    38.355787 13.718771 14.634213
 sRGB2   0.4582187372166619, 0.32026895559707236, 0.2638486736088391
+gRGB    0.411765,0.266667,0.207843
 
 light skin
 lab     66.056 17.737 17.848
 lch     66.056 25.16251722304428 45.17872167764671
 sRGB    0.7801707995054818 0.5819574034194599 0.5077367244326566
 pso     0.163688 0.432714 0.425879 0.092646
+f39     0.122705 0.419838 0.426357 0.158770
 nRGB    0.7588310384479999 0.514729221244 0.520930985834
 lab2    66.129284 17.669899 17.807828
 sRGB2   0.7805176035161692, 0.5829073185641944, 0.5087401105289944
+gRGB    0.745098,0.537255,0.466667
 
 blue sky
 lab     50.090  -4.407 -22.51
 lch     50.09 22.937343983120627 258.92276283824305
 sRGB    0.35861374256727024 0.4806652888422717 0.6165556939500282
 pso     0.668291 0.411277 0.141541 0.149605
+f39     0.631933 0.359941 0.106092 0.260416
 nRGB    0.282083675055 0.500647095585 0.730029241305
 lab2    50.117317 -4.421669 -22.509928
 sRGB2   0.35875115219527526, 0.48096599854692784, 0.6168384685511774
+gRGB    0.309804,0.447059,0.580392
 
 foliage
 lab     43.204 -13.464 21.73
 lch     43.204 25.5631022374046 121.78253045403237
 sRGB    0.3495819784053142 0.4234457970321011 0.2542085775554397
 pso     0.554549 0.256601 0.759120 0.456182
+f39     0.500543 0.152431 0.741138 0.547711
 nRGB    0.24224427191800002 0.404273757382 0.13099487984000002
 lab2    43.247288 -13.473697 21.727580
 sRGB2   0.3499226420099233, 0.4238844849496026, 0.25461719810452926
+gRGB    0.278431,0.380392,0.215686
 
 blue flower
 lab     55.356   8.891 -24.82
 lch     55.356 26.36441315485706 289.7084979581484
 sRGB    0.5129520005814212 0.5041314384420632 0.6891861857957071
 pso     0.549989 0.491789 0.062328 0.024350
+f39     0.521836 0.470595 0.031484 0.117416
 nRGB    0.43905323215000003 0.49583606215 0.9148396867999999
 lab2    55.407536 8.848533 -24.786018
 sRGB2   0.5132734852465152, 0.5047422707613722, 0.6894986443758445
+gRGB    0.462745,0.466667,0.662745
 
 bluish green
 lab     70.700 -32.892 -0.24
 lch     70.7, 32.8928755811954, 180.4180573712323
 sRGB    0.3687923577561622, 0.7436846055136055, 0.6747488404682519
 pso     0.619655 0.000000 0.384641 0.000000
+f39     0.633690 0.000000 0.408456 0.000000
 nRGB    0.38034500000000004, 1, 0.615359
 lab2    70.628876 -32.567650 -0.106069
 sRGB2   0.372989512735539, 0.7423372172978121, 0.6730831350137813
+gRGB    0.313726,0.752941,0.670588
+
+row 2
 
 orange
 lab     62.559 35.135 58.050
 lch     62.559, 67.85477672942413, 58.81540553823881
 sRGB    0.8737289596078436, 0.48743013287545317, 0.17203723560187653
 pso     0.030043 0.574539 0.912639 0.073987
+f39     0.003757 0.578048 0.920334 0.095832
 nRGB    0.898192791441, 0.39398241699299996, 0.08089742169300007
 lab2    62.577187 35.127123 57.970828
 sRGB2   0.8738681678776227, 0.4876500343386742, 0.17299853216999808
+gRGB    0.874510,0.482353,0.168627
 
 purplish blue
 lab     40.178   9.551 -44.289
 lch     40.178, 45.307142063917475, 282.16956757875397
 sRGB    0.27056023971670246, 0.36068663956511976, 0.6579706647059643
 pso     0.844520 0.680119 0.000000 0.000000
+f39     0.840644 0.670839 0.000000 0.000000
 nRGB    0.15547999999999995, 0.31988099999999997, 1
 lab2    39.528723 8.485752 -42.112271
 sRGB2   0.2672365291065321, 0.35634121892764137, 0.6366766805131686
+gRGB    0.227451,0.380392,0.678431
 
 moderate red
 lab     51.711 47.694 16.857
 lch     51.711, 50.58533468308775, 19.46548035000572
 sRGB    0.782365578265228, 0.3299609364735502, 0.38206099086629175
 pso     0.095888 0.773688 0.462167 0.120127
+f39     0.021308 0.765123 0.435755 0.191336
 nRGB    0.795503737776, 0.19912581837599996, 0.473224735209
 lab2    51.746686 47.576278 16.846156
 sRGB2   0.7821732524867637, 0.3308898756914544, 0.38243679535004477
+gRGB    0.772549,0.313726,0.364706
 
 purple
 lab     30.375 21.131 -20.30
 lch     30.375, 29.30203339360598, 316.14905286918514
 sRGB    0.3602612680842865, 0.23316052206020216, 0.40644889811705104
 pso     0.672001 0.844106 0.160514 0.315601
+f39     0.616052 0.791967 0.071197 0.427333
 nRGB    0.22448218760100003, 0.10669369770600001, 0.574543378914
 lab2    30.411496 21.061348 -20.318246
 sRGB2   0.3601681773047287, 0.2337026527115698, 0.40690694991553045
+gRGB    0.305882,0.184314,0.392157
 
 yellow green
 lab     72.492 -23.462 57.07
 lch     72.492, 61.70454070811969, 112.34801292482507
 sRGB    0.6237512399897851, 0.7401843871288837, 0.2479420452626609
 pso     0.403959 0.032823 0.879513 0.060450
+f39     0.431908 0.017645 0.900370 0.072336
 nRGB    0.56001032155, 0.90871115035, 0.11320356085000005
 lab2    72.508214 -23.408051 57.073785
 sRGB2   0.6243402679456442, 0.7402564895470182, 0.2481094860598959
+gRGB    0.572549,0.741176,0.282353
 
 orange yellow
 lab     71.963 19.486 67.998
 lch     71.963, 70.73494327416967, 74.0094313244772
 sRGB    0.9046813185631295, 0.633661174512058, 0.15251462577238098
 pso     0.026882 0.373528 0.917099 0.064206
+f39     0.013742 0.382738 0.930336 0.080467
 nRGB    0.9106379856919999, 0.586248738768, 0.07757825839400001
 lab2    71.988196 19.474792 67.954180
 sRGB2   0.9048940271975158, 0.6339596890612941, 0.15339352561401925
+gRGB    0.894118,0.607843,0.156863
+
+row 3
 
 blue
 lab     28.653 15.600 -50.52
 lch     28.653, 52.87372126113312, 287.160091652553
 sRGB    0.15434596195192993, 0.24382769404212812, 0.577067166400983
 pso     1.000000 0.846365 0.000000 0.000000 <- out of cmyk gamut
+f39     1.000000 0.860826 0.000086 0.000000 <- out of cmyk gamut
 nRGB    0, 0.15363499999999997, 1
 lab2    30.757057 13.043556 -46.247492
 sRGB2   0.1885077418085538, 0.2669630435260571, 0.5716433494042713
+gRGB    0.105882,0.270588,0.611765
 
 green
 lab     55.046 -38.088 31.61
 lch     55.046, 49.496341723404164, 140.31003467778154
 sRGB    0.2638932762091318, 0.5813842341831656, 0.2868628888000584
 pso     0.713157 0.070127 0.861648 0.155189
+f39     0.716577 0.010590 0.868547 0.218896
 nRGB    0.242328121673, 0.785566939003, 0.11688129147199999
 lab2    55.076474 -38.063910 31.653426
 sRGB2   0.2646462627318877, 0.5816644325835935, 0.2868280450381334
+gRGB    0.192157,0.584314,0.298039
 
 red
 lab     42.182 54.893 28.785
 lch     42.182, 61.982398098169774, 27.671788697910042
 sRGB    0.713817099436228, 0.18067207842425287, 0.22093013045788767
 pso     0.057877 0.955528 0.744658 0.237287
+f39     0.003043 0.936976 0.709326 0.274589
 nRGB    0.718569459699, 0.03391937253599997, 0.194752662846
 lab2    42.245669 54.914956 28.770983
 sRGB2   0.7146677910900988, 0.18129201804963102, 0.22158169573232422
+gRGB    0.709804,0.121569,0.203922
 
 yellow
 lab     82.230   4.048 79.844
 lch     82.23, 79.94654864345301, 87.09765413971907
 sRGB    0.9404835651314826, 0.7835709856805116, 0.08810062284962886
 pso     0.022256 0.158332 0.932802 0.056649
+f39     0.033382 0.172587 0.948189 0.052197
 nRGB    0.922355780144, 0.793988349468, 0.06339130049800001
 lab2    82.274025 4.002809 79.974855
 sRGB2   0.9407993645532297, 0.7841539475893631, 0.08566175584729577
+gRGB    0.925490,0.764706,0.149020
 
 magenta
 lab     51.820 49.787 -13.90
 lch     51.82, 51.690960225168965, 344.4008329076339
 sRGB    0.7557397317132898, 0.32885676834031397, 0.5847761463440625
 pso     0.234213 0.793246 0.022206 0.012446
+f39     0.219151 0.791049 0.006654 0.054204
 nRGB    0.756256014998, 0.20418073971600004, 0.965624375876
 lab2    51.838108 49.793529 -13.890209
 sRGB2   0.7559961335162456, 0.3290130166090527, 0.5848995185260243
+gRGB    0.725490,0.321569,0.596078
 
 cyan
 lab     50.555 -27.973 -28.13
@@ -201,62 +247,76 @@ lch     50.555 33.7 225.1695015620979
 lab     50.555 -23.758898108744773 -23.89989039008933
 sRGB    0.0009044016966127655 0.5205697664872857 0.6288076105046994
 pso     0.797136 0.159738 0.165963 0.237161
+f39     0.786995 0.145292 0.174643 0.266541
 rRGB    0.15475257089600003, 0.6409846238179999, 0.636235951043
 lab2    50.577208 -23.813859 -24.002466
 sRGB2   -0.005719132979570607, 0.5209048947566058, 0.6297264649129999
+gRGB    0.043137,0.505882,0.603922
 
 white 9.5 (.05 D)
 lab     96.387  -0.404   2.238
 lch     96.387, 2.274172376931881, 100.23273666083813
 sRGB    0.9617491586334798, 0.9596837804789503, 0.9420309128191856
 pso     0.042452 0.031800 0.055804 0.000000
+f39     0.045478 0.031057 0.066461 0.000000
 nRGB    0.957548, 0.9682, 0.944196
 lab2    96.398996 -0.425662 2.241989
 sRGB2   0.9617244417454606, 0.9598717556997672, 0.9421314655249645
+gRGB    0.949020,0.945098,0.925490
 
 neutral 8 (.23 D)
 lab     81.014  -0.570   0.180
 lch     81.014, 0.5977457653551382, 162.47443162627712
 sRGB    0.7848759799508187, 0.7900901105897526, 0.787351861664225
 pso     0.222900 0.158683 0.159239 0.025770
+f39     0.245503 0.169889 0.190266 0.021639
 nRGB    0.7570741329999999, 0.8196362609100001, 0.81909458903
 lab2    81.097257 -0.584252 0.134028
 sRGB2   0.7855533776779254, 0.7910373765997412, 0.7885906000898528
+gRGB    0.733333,0.752941,0.752941
 
 neutral 6.5 (.44 D)
 lab     66.297  -0.434 -0.079
 lch     66.297, 0.44113149966874954, 190.3164636177376
 sRGB    0.6285501894340038, 0.6329284759216435, 0.632407706965441
 pso     0.356944 0.272657 0.260496 0.114909
+f39     0.317112 0.237954 0.248371 0.208352
 nRGB    0.569163078096, 0.643764743213, 0.6545283348640001
 lab2    66.317275 -0.432188 -0.054450
 sRGB2   0.6288354649705368, 0.6331318685228658, 0.6324472762315926
+gRGB    0.572549,0.584314,0.588235
 
 neutral 5 (.70 D)
 lab     50.830  -0.687 -0.268
 lch     50.83, 0.7374232163418779, 201.3108507096969
 sRGB    0.4691121777258797, 0.4760603564968741, 0.47621104289127564
 pso     0.477445 0.383105 0.349081 0.289582
+f39     0.346517 0.263343 0.268701 0.464599
 nRGB    0.37123247799000003, 0.43825331211000007, 0.462424574142
 lab2    50.817427 -0.700608 -0.287514
 sRGB2   0.4688462175707377, 0.4759681013575035, 0.4762143055769343
+gRGB    0.411765,0.423529,0.427451
 
 neutral 3.5 (1.05 D)
 lab     35.724  -0.521 -0.468
 lch     35.724, 0.7003320640953119, 221.93248294171104
 sRGB    0.32496296405417696, 0.33053531849566803, 0.3322574333971765
 pso     0.577187 0.473918 0.412416 0.524124
+f39     0.419185 0.328176 0.313476 0.667397
 nRGB    0.2012065591879999, 0.25034979783199995, 0.2796171235839999
 lab2    35.746030 -0.543022 -0.484248
 sRGB2   0.32498560042425684, 0.33078694025010386, 0.33256070783141206
+gRGB    0.262745,0.274510,0.286275
 
 black 2 (1.5 D)
 lab     20.706   0.025   -0.447
 lch     20.706, 0.44769855930078667, 273.2011270261488
 sRGB    0.19462750886077482, 0.1953957463070961, 0.1979475537592461
 pso     0.693063 0.595110 0.469317 0.802219
+f39     0.525847 0.433151 0.389007 0.865985
 nRGB    0.060706306796999954, 0.08007954909000004, 0.10495901442300004
 lab2    20.542248 -0.102405 0.326121
 sRGB2   0.19402330545665936, 0.19413204024565262, 0.19210302241366276
+gRGB    0.101961,0.109804,0.125490