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-rw-r--r--src/colour_conversion.cc2
1 files changed, 1 insertions, 1 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))
);