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0d828ac838
Removed testgrids 'bugs/vis' and '3rdparty'; tests have been redistributed across other grids. Moved testgrid 'v3d/ivtk' into dedicated 'vtk/ivtk'. Added testgrid 'vselect' dedicated to 3D viewer picking/selection functionality and filled with tests from 'v3d/vertex', 'v3d/face' and similar groups. Added testgrid 'opengl' dedicated to OpenGL driver low-level functionality (GLSL programs and similar) and filled with tests from 'v3d/glsl', 'v3d/raytrace', '3rdparty/fonts', 'bugs/vis' (portion) and similar. Added testgrid 'opengles3' dedicated to OpenGL ES 3.0 driver low-level functionality and reusing tests from 'opengl' testgrid. Subgroup 'opengles3/raytrace' is disabled on Windows, as Ray-Tracing currently requires OpenGL ES 3.2. while ANGLE library implements only OpenGL ES 3.0. Added testgrid 'opengles2' dedicated to OpenGL ES 2.0 driver low-level functionality and reusing a limited subset of passing tests from 'opengl' testgrid. Currently testgrid is activated only on Windows platform when using ANGLE library (properietary OpenGL ES drivers do not allow creation of restricted 2.0 context). Test cases have been cleaned out to put bug description into log, to properly load necessary plugins and to explicitly dump viewer.
61 lines
2.4 KiB
Plaintext
61 lines
2.4 KiB
Plaintext
# Check calculation of CIE Ddlta E 2000 color difference
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pload VISUALIZATION
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# Reference data are obtained using online calculator
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# http://brucelindbloom.com/index.html?ColorDifferenceCalc.html
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# or
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# https://cielab.xyz/
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# Second one also shows color and reports if it is out of RGB gamut.
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#
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# Note that values out of RGB gamut would be amended during
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# conversion to RGB and thus the result would be different!
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#
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# Samples aimed at testing discontinuity of CIEDE2000
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# formula are very sensitive to accuracy, we need higher tolerance
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# because conversion is done via RGB floats and loses precision.
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#
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# Format: { {L1 a1 b1} {L2 a2 b2} expected_diff [tolerance] }
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set lab_diff_samples {
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{ # synthetic color pairs }
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{ {0 0 0} {50 0 0} 36.519268 }
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{ {50 0 0} {100 0 0} 36.519268 }
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{ {0 0 0} {100 0 0} 100. }
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{ {20 10 10} {80 10 10} 60. }
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{ {50 0 0} {50 0 50} 23.529412 }
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{ {50 60 60} {50 60 0} 28.016927 }
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{ {30 30 40} {30 30 -60} 44.606253 }
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{ # discontinuity of CIEDE2000 formula }
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{ {30 50.00 40} {20 -10 -8} 39.105394 0.001 }
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{ {30 50.01 40} {20 -10 -8} 43.53247 0.001 }
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{ {20 30.00 30.01} {60 -10 -10} 49.416742 0.05 }
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{ {20 30.01 30.00} {60 -10 -10} 52.448227 0.05 }
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{ # randomly generated data }
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{ {73.4450 34.9839 -24.6753} {87.6216 -18.4863 57.8838} 62.402500 }
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{ {93.6166 -27.3677 29.3893} {46.9191 12.3400 -27.5948} 54.640034 }
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{ {53.9062 61.0929 -51.7583} {65.5157 26.3376 -37.0512} 15.679046 }
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{ {83.6996 9.3358 -24.5571} {93.2268 -3.8589 3.5217} 23.158692 }
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{ {64.8053 -27.3177 -8.9602} {65.8225 37.3192 -38.1465} 34.670514 }
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{ {94.7633 -19.7915 69.2787} {90.9238 -16.7535 4.1936} 26.093024 }
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{ {85.4699 5.6078 -11.1083} {67.9455 -28.4536 7.8808} 31.115070 }
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{ {83.5473 -15.7170 8.3546} {81.3193 -37.2851 57.7090} 19.696753 }
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{ {75.7406 -12.0785 -12.3505} {80.0810 -54.8591 52.1739} 35.834099 }
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{ {62.8209 32.1209 16.9113} {82.1106 25.0843 -7.9416} 21.178519 }
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}
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foreach sample $lab_diff_samples {
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set lab1 [lindex $sample 0]
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if { $lab1 == "#" } continue
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set lab2 [lindex $sample 1]
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set dref [lindex $sample 2]
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set diff [vcolordiff {*}[vcolorconvert from lab {*}$lab1] {*}[vcolorconvert from lab {*}$lab2]]
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# use tolerance 1e-4 except if other value is defined in sample data
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set tol [lindex $sample 3]
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if { $tol == "" } { set tol 1e-4 }
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checkreal "CIEDE2000 diff of Lab colors ($lab1) and ($lab2)" $diff $dref $tol 1e-6
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}
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