LUTCalc is a desktop app for generating, analyzing and previewing 1D and 3D Lookup Tables (LUTs) for video cameras that shoot log gammas. LUTCalc understands almost all log flavors in use today, plus standard gammas such as Rec709 and manufacturer-tuned versions. LUTCalc provides detailed exposure information about any look it generates, such as the recorded levels for absolute black, a correctly exposed 18% grey card or 90% white card and others. LUTCalc includes a number of built-in test images with charts such as high contrast and low contrast, greyscale and full colour gamut along with the option to load a .png, .jpg, or .bmp.
v4.0
4.01
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* New Feature - Save PDFs of info charts from the Mac app 'File' menu.
* Improved Feature - Load any valid file type from the app 'File' menu.
4.0
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* New Feature - MacOS code completely rewritten for future updates and speed.
* New Feature - Preferred settings (eg camera, LUT type) can be set as default (File->Make Current Settings Default) for startup and when starting a new LUT.
* Feature Change - Improved design of chart printouts / pdfs.
* New Feature - Additional cameras; Sony, Panasonic, DJI, Nikon.
* New Feature - Sony Venice-tuned S-Gamut3 and S-Gamut3.cine using primaries calculated from Sony's IDTs (these shouldn't be camera-specific, the S-Gamut primaries should be set in stone, but Sony definitely offers different ones for the Venice).
* New Feature - Added Nikon N-Log gamma curve.
* New Feature - Fixed point precision setting within settings, so that LUT files can be more precise than the default six or eight decimal places. Good for scene linear output LUTs.
* New Feature - Added Sony s709 colourspace, estimated using Venice ACES primaries to reduce green on FS7 / FX9. TBD if this is the right approach.
* Feature Change - Improved Arri LogC high ISO highlight response.
* Feature Change - Added 33x LUT option to SmallHD, confirmed SmallHD preset over HDMI and SDI using FX9 and a6500 with latest PageOS4.
* New Feature - DJI DLog and DGamut (Zenmuse X5 and X7 version).
* New Feature - DJI DLog-M based upon test images taken by Mark Walter with a Mavic 2.
* New Feature - 'SDR Saturation' improves HLG compatibility on SDR displays by increasing saturation as per the BT.2390 spec. Available with all HDR options.
* Bugfix - Fixed Lumetri / Speedgrade cube linear and conventional gamma settings.
* Bugfix - Fixed custom input scaling bug.
* Bugfix - Black Gamma was not available for 1D LUTs.
* Bugfix - Custom input scaling does not appear or be applied unless explicitly checked. Could cause unexpected results with DaVinci and Adobe cubes if not needed.
* Bugfix - Correct output of 'LUT_1D_INPUT_RANGE' or 'LUT_3D_INPUT_RANGE' in Resolve-style cube files with input scaling.
