diff options
| author | Carl Hetherington <cth@carlh.net> | 2025-05-05 01:11:50 +0200 |
|---|---|---|
| committer | Carl Hetherington <cth@carlh.net> | 2025-10-14 20:50:53 +0200 |
| commit | a29d21d854dd37ab17db9b6d28255fd4b52f6017 (patch) | |
| tree | 01215d937d8b90a6e11b30d1c9b2aef0688ab02e /test | |
| parent | fbe4e1ca774fce6608de7ab910b0e346453682b2 (diff) | |
Add convert_rgb_gamma().3026-mpeg2-colour
Diffstat (limited to 'test')
| -rw-r--r-- | test/colour_conversion_test.cc | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/test/colour_conversion_test.cc b/test/colour_conversion_test.cc index aff178f5..9f5476b8 100644 --- a/test/colour_conversion_test.cc +++ b/test/colour_conversion_test.cc @@ -273,8 +273,8 @@ BOOST_AUTO_TEST_CASE(rgb_xyz_test) } -/** Check the piecewise LUT that is used for inverse gamma calculation */ -BOOST_AUTO_TEST_CASE (rgb_xyz_lut_test) +/** Check the piecewise LUT that is used for inverse J2K gamma calculation */ +BOOST_AUTO_TEST_CASE(inverse_j2k_lut_test) { auto conversion = dcp::ColourConversion::rec709_to_dcp(); auto lut = dcp::make_inverse_gamma_lut(conversion.out_j2k(), 4095); @@ -285,6 +285,18 @@ BOOST_AUTO_TEST_CASE (rgb_xyz_lut_test) } +/** Check the piecewise LUT that is used for inverse MPEG2 gamma calculation */ +BOOST_AUTO_TEST_CASE(inverse_mpeg2_lut_test) +{ + auto conversion = dcp::ColourConversion::rec709_to_dcp(); + auto lut = dcp::make_inverse_gamma_lut(conversion.out_mpeg2(), 255); + + for (double x = 0; x < 1; x += 0.000001) { + BOOST_CHECK(std::abs(lut.lookup(x) - lrint(pow(x, 1 / 2.4) * 255)) < 2); + } +} + + static list<string> notes; static void |