91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkCIEDE2000.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/*=========================================================================
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The MIT License (MIT)
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Copyright (c) 2015 Greg Fiumara
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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=========================================================================*/
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/**
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* Private header used by vtkColorTransferFunction to support
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* LAB/CIEDE2000 interpolation.
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*
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* Reference:
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* "Color Interpolation for Non-Euclidean Color Spaces",
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* Zeyen, M., Post, T., Hagen, H., Ahrens, J., Rogers, D. and Bujack, R.,
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* SciVis ShortPapers IEEE VIS 2018.
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* (https://datascience.dsscale.org/wp-content/uploads/sites/3/2019/01/ColorInterpolationforNon-EuclideanColorSpaces.pdf)
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*
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* The implementation is a modified version based on the following:
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* https://github.com/gfiumara/CIEDE2000
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*
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*/
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#ifndef vtkCIEDE2000_h
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#define vtkCIEDE2000_h
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#include <vector> // needed for std::vector
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namespace CIEDE2000
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{
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/**
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* Node of the color path
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*/
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struct Node
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{
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double rgb[3]; // RGB color
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double distance; // Distance from the start
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};
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/**
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* Map a RGB color to its corresponding color in the sampled RGB space.
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*/
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void MapColor(double rgb[3]);
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/**
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* Returns the distance between two colors as given by the
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* CIE Delta E 2000 (CIEDE2000) color distance measure.
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*/
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double GetCIEDeltaE2000(const double lab1[3], const double lab2[3]);
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/**
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* Calculates the shortest color path between two colors with respect
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* to the CIEDE2000 measure and returns its overall length.
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*/
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double GetColorPath(const double rgb1[3], const double rgb2[3], std::vector<Node>& path,
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bool forceExactSupportColors);
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}
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#endif
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// VTK-HeaderTest-Exclude: vtkCIEDE2000.h
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