As some have seen, in the most recent build of ColourSpace we have made changes to the way 109% Extended Range works.
This has been planned for some time, and is also a precursor changes for PQ HDR calibration.The changes in the present ColourSpace build should not really have been released as yet...
But, they have been, and the next release will finalise the changes for 109% Extended.
The information provided in the Patch Scale & Resolution
page has been update to include information on these changes, including specific information on the requirement for the 'white patch'.
If this information is not followed correctly, especially with User Preset Patch Lists, the resulting profile, and any LUT generated from it, will be incorrect.Critically, users must be aware of 109% using 235 (8 bit) as the white patch, with the addition of over-range patch data up to, and including, a 255 patch.
If a user patch set lacks a 235 and/or 255 patch (8 bit), depending on the Patch Scale range being used, synthetic data taken from the 'Target Max' value in the Settings page will be added to the profile.
Mob Boss at Light Illusion