An App for generating, analysing and previewing 1D and 3D Lookup Tables (LUTs) for video cameras that shoot log gammas.
LUT Generator:
* LUTCalc understands almost all log flavours in use today, plus standard gammas such as Rec709 and manufacturer-tuned versions. Log and conventional gamma data has been taken from manufacturer-published documentation or standards papers.
* LUTCalc can produce accurate exposure adjustment LUTs for use in post where a simple tool is often not currently available, such as with Sonys CineEI.
* Convert between any of the included log and conventional gammas or to one of a number of creative looks modelled after those available in camera, either as a 1D tone curve only conversion, or as a full 3D colourspace conversion (such as S-Log3/S-Gamut3.cine to Rec709(800%).
* Change the input settings but not the output settings as a base when working with different camera models on a multi camera shoot.
* Customise looks to taste, from simple black level and saturation adjustments to more complex effects such as desaturating specific colour ranges.
* Adjust colour temperature either by CTO / CTB as with gels or by source and desired colour temperature.
* Plus Green / Minus Green slider to correct for fluorescent lighting.
* Take white balances from test images.
* Output to any of a number of common LUT formats, automatically adjusted for the intended use (MLUT or specific post software).
* Produces MLUTs suitable for loading directly into Sonys cameras (as User 3D MLUTs), with other in-camera options in development.
LUT Analyser:
* 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. It takes into account any adjustments and tweaks that have been made. The levels would ensure that when working to a monitor LUT the log recording would be correctly exposed as designed.
* Charts show the tone curves for the recording and the output, plus indicate the absolute dynamic range of the camera - black clip and white clip - where it is known.
* The LUTAnalyst tool can read LUTs in a number of formats. Where the recorded log and colourspace flavours it is designed for are known it will attempt to convert it for use as with any of the built-in options, and provide the same exposure and tone curve information.
* A False Colour option can be used to generate accurate, log-curve specific exposure assistance MLUTs where it is not available in camera. Just dont bake it in!
* Full instructions and details of all options are provided.
LUT Visualiser:
* 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.
* Waveform, vectorscope and RGB parade scopes.
* xy / uv Chromacity preview image displays the recorded and output gamut triangles and white points, incorporating adjustments.
* Tone curve charts as stop in / recorded level out, linear in / linear out and LUT in / LUT out.
* Provides 10-bit RGB readings from the Preview image.
LUTCalc has been developed by a cameraman with over 25 year experience for his own work and LUTs produced have been used extensively on commercial projects. It continues to develop as new shoots reveal new needs.
