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AMPAS Academy Color Encoding System Developer Resources
Here is the draft submission of the ARRI LogC4 ACES IDT. Items remaining to be discussed: - Directory structure - ACES Transform ID ARRI LogC4 White Paper will be supplied...
These transform all shared the same ACEStransformID: ``` aces-dev/transforms/ctl/outputTransform/p3/InvRRTODT.Academy.P3D65_1000nits_15nits_ST2084.ctl aces-dev/transforms/ctl/outputTransform/p3/InvRRTODT.Academy.P3D65_2000nits_15nits_ST2084.ctl aces-dev/transforms/ctl/outputTransform/p3/InvRRTODT.Academy.P3D65_4000nits_15nits_ST2084.ctl ``` Fixed in accordance with file names.
https://github.com/ampas/aces-dev/blob/d3d4df5f0095dfa663bee768ff57c8b9135ebb05/transforms/ctl/lmt/InvLMT.Academy.ReferenceGamutCompress.ctl#L10 This copy of the usage comment from the forward transform is not correct for the inverse transform. A gamut expansion may well create negative AP1 values, where they were...
https://github.com/ampas/aces-dev/blob/d3d4df5f0095dfa663bee768ff57c8b9135ebb05/transforms/ctl/lmt/LMT.Academy.ReferenceGamutCompress.ctl#L18 The reference to the `direction` runtime flag is no longer correct, since the forward and inverse LMTs have been split into separate transforms.
It appears that in `ACESlib.OutputTransforms.ctl`, the order of operations still clips to `LIMITING_PRI` before chromatic adaptation. This means that, for example, for D65 Output Transforms without D60 sim, red is...
ACES to ADX transform should be examined for possible updates as suggested in this [ACES Central post](https://acescentral.com/t/aces-1-2-release-candidate-1/2399/5) > There is also a clamp in the ADX transforms (not new to...
Hi, To help the automatic discovery of the *CTL* transforms and for consistency purposes it would be great to have the *outputTransforms* categorised by display types like for the ODTs:...
https://github.com/ampas/aces-dev/blob/518c27f577e99cdecfddf2ebcfaa53444b1f9343/transforms/ctl/csc/ACEScg/ACEScsc.Academy.ACES_to_ACEScg.ctl#L32 This clamp seems erroneous. None of the other color space conversion transforms contain a similar clamp and this seems wrong as it breaks reversibility - any valid ACES (AP0)...
The existing comments relate to c9 rather than c5 spline.
https://github.com/ampas/aces-dev/blob/76ea982a988d278dd12b563602771f46a5da3b83/transforms/ctl/lib/ACESlib.Utilities_Color.ctl#L463 I notice that the CTL code for the HLG Output Transform uses the HLG EOTF from ITU-R BT.2100-1, not ITU-R BT.2100-2, in the function `ST2084_2_HLG_1000nits_f3` (and its inverse). This...