libdcp/src/colour_conversion.cc, branch v1.4.4 DCP handling library https://git.carlh.net/cgit/libdcp/atom?h=v1.4.4 2016-08-12T12:26:46Z Try non-linearised gamma of 2.4 for Rec 2020. 2016-08-12T12:26:46Z Carl Hetherington cth@carlh.net 2016-08-12T12:26:46Z urn:sha1:11777d1eacac733dbfc5a7eef9337458a922f63e Some discussion of this on #892. Also influenced by discussions with Dennis (email Tue, 30 Jun 2015) on how the oft-quoted (e.g. by Wikipedia) gamma functions are camera transforms and not intended for uses like ours. Also see ITU-r BT1886 which talks about a gamma of 2.4. Add OpenSSL licence exception. 2016-06-13T11:40:54Z Carl Hetherington cth@carlh.net 2016-06-13T11:40:54Z urn:sha1:d927e9b913606f4fc982885c7582ecaf0e3c5a1a Still more licence fixups. 2016-06-01T22:54:58Z Carl Hetherington cth@carlh.net 2016-06-01T22:54:58Z urn:sha1:a641fdc912a3f0749015decdf9e23ff15186ef78 No-op; Fix GPL address and mention libdcp by name. 2016-05-25T19:46:53Z Carl Hetherington cth@carlh.net 2016-05-25T19:46:53Z urn:sha1:f9cba324c8160a70b108d9e5b60a4ccad6ee9be2 Add somewhat speculative Rec 1886 and Rec 2020 colour conversions. 2016-05-24T11:25:22Z Carl Hetherington cth@carlh.net 2016-05-24T11:25:22Z urn:sha1:85c699d29aab7ca7f7218b3f7f859e10c9025e37 Return to DCP-o-matic v1's gamma correction for Rec 601/709. 2015-06-29T22:40:29Z Carl Hetherington cth@carlh.net 2015-06-29T22:40:29Z urn:sha1:5769392a51631355fff96854911700b85d98eae5 Dennis points out that `there definitely *is* no right answer for BT.709 gamma' and `your formula [the DCP-o-matic v2 gamma function before this commmit] is what I'm calling the inverse of the BT.709 camera transfer function. The EBU would not have bothered to write: "Therefore the monitor gamma is not, and never has been, the inverse of the camera gamma." if no-one ever thought of using it'. At least the 2.2 gamma of v1 should not surprise anybody. No-op: whitespace. 2015-06-24T00:06:04Z Carl Hetherington cth@carlh.net 2015-06-24T00:06:04Z urn:sha1:9e523d8a4062ad52330dff6c2ba50e54184c9bb2 Add p3_to_xyz colour conversion preset. 2015-04-22T14:56:56Z Carl Hetherington cth@carlh.net 2015-04-22T14:56:56Z urn:sha1:fa1dddf081a35fde2479f6a23088b608ee956437 Fix crash in previous. 2015-04-22T13:01:19Z Carl Hetherington cth@carlh.net 2015-04-22T13:01:19Z urn:sha1:7ff5a08960fc0d8ab10ce9b0d79e677000cd07e0 Express colour conversions as chromaticities and adjust so that 2015-04-22T12:58:16Z Carl Hetherington cth@carlh.net 2015-04-22T12:58:16Z urn:sha1:86bfdeb77f55b379302a65b22f57fc0583ec6b3c everything is specified as something_to_xyz and then you can get an inverse LUT if you want one.