Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Creates Low Mid and High mattes from an image for grading purposes
Same matte values as the colourCorrect node but is designed for working outside of that node. The "Low Mid and High mattes" are put into the "Red Green and Blue channels" respectively, (plus it passes through any alpha just to fill the channel.)
Control over lowWeight and HighWeight - Midweight takes care of itself. plus options to base the mattes on only the R G or B or a custom weighting of the source image.
There is a ramp option to help see what the mattes are actually doing to a basic ramp.
Goes into Color tab although you could argue it should be in the Key tab I guess.
Again thanks to Peter Warner for his help in sorting out the lookup curves for me.