This project enables the creation of ITU-R BT.601-7 and BT.709-6 ICC profiles.
- Full-range, floating point Y, Cb, and Cr channels
- Supports both the BT.601/709 OETF as well as the BT.1886 EOTF curve
- v2 and v4 profiles
- For the v4 profiles, a
DtoB0tag is included that packs the complete pipeline in floating point precision (see caveat below)
- The v2 profiles pack the complete transformation into a single CLUT, due to tag limitations
- The v4 profiles pack the YCbCr <-> RGB step into a CLUT for the same reason; the remaining steps are explicitly saved into the AtoB0 components
- The BT.601/709 curve must be sampled prior to storage in
DtoB0because its parametric shape is not supported by the tag
Requires meson, ninja, LittleCMS 2.0 or higher, plus a suitable C++ compiler.
From the root of this repo, issue the following commands:
meson --prefix=/usr/local ./build .
ninja -C build install
Alternatively, download the pregenerated profiles from the Releases section.
The profile generation code and the profiles themselves are separately licensed. Please see the LICENSE-PROFILES.txt and LICENSE.txt files.