diff options
| author | Carl Hetherington <cth@carlh.net> | 2015-02-17 20:03:30 +0000 |
|---|---|---|
| committer | Carl Hetherington <cth@carlh.net> | 2015-02-17 20:03:30 +0000 |
| commit | e94c6239d1a88c5a6d2b6eef7fb0f5fc28cb8777 (patch) | |
| tree | 1f79f67fd3f3f33b3047a440af37f2515e40d037 | |
| parent | 4f68d50abb5a83628482fd166e40f3b4b281166b (diff) | |
Use 2.222222 for the power in the modified Rec. 709 input gamma
correction, as per fnordware DCIconverter.
| -rw-r--r-- | src/colour_conversion.cc | 2 | ||||
| -rw-r--r-- | test/colour_conversion_test.cc | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/src/colour_conversion.cc b/src/colour_conversion.cc index 17955915..39799927 100644 --- a/src/colour_conversion.cc +++ b/src/colour_conversion.cc @@ -51,7 +51,7 @@ ColourConversion const & ColourConversion::rec709_to_xyz () { static ColourConversion* c = new ColourConversion ( - shared_ptr<const TransferFunction> (new ModifiedGammaTransferFunction (false, 2.4, 0.081, 0.099, 4.5)), + shared_ptr<const TransferFunction> (new ModifiedGammaTransferFunction (false, 1 / 0.45, 0.081, 0.099, 4.5)), dcp::colour_matrix::rgb_to_xyz, shared_ptr<const TransferFunction> (new GammaTransferFunction (true, 2.6)) ); diff --git a/test/colour_conversion_test.cc b/test/colour_conversion_test.cc index 7193a5ef..9111b918 100644 --- a/test/colour_conversion_test.cc +++ b/test/colour_conversion_test.cc @@ -71,9 +71,9 @@ BOOST_AUTO_TEST_CASE (colour_conversion_test2) { ColourConversion cc = ColourConversion::rec709_to_xyz (); - check_modified_gamma (cc.in(), 8, 2.4, 0.081, 0.099, 4.5); - check_modified_gamma (cc.in(), 12, 2.4, 0.081, 0.099, 4.5); - check_modified_gamma (cc.in(), 16, 2.4, 0.081, 0.099, 4.5); + check_modified_gamma (cc.in(), 8, 1 / 0.45, 0.081, 0.099, 4.5); + check_modified_gamma (cc.in(), 12, 1 / 0.45, 0.081, 0.099, 4.5); + check_modified_gamma (cc.in(), 16, 1 / 0.45, 0.081, 0.099, 4.5); check_gamma (cc.out(), 8, 1 / 2.6); check_gamma (cc.out(), 12, 1 / 2.6); |