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Implementation of decolorization method: Semiparametric Decolorization With Laplacian-Based Perceptual Quality Metric
Based on paper: Q. Liu, P. X. Liu, Y. Wang and H. Leung, "Semiparametric Decolorization With Laplacian-Based Perceptual Quality Metric," in IEEE Transactions on Circuits and Systems for Video Technology, vol. 27, no. 9, pp. 1856-1868, Sept. 2017, doi: 10.1109/TCSVT.2016.2555779. keywords: {Image color analysis;Color;Measurement;Gray-scale;Computational modeling;Adaptation models;Mathematical model;Color-to-gray conversion;RGB2GRAY;semiparametric;subspace modeling;two-order polynomial model}
Credits to matlab implementation: https://github.com/yqx7150/SPDecolor
Results: