Extended RGB2Gray Conversion Model for Efficient Contrast Preserving Decolorization

Extended RGB2Gray Conversion Model for Efficient Contrast Preserving Decolorization

% Distribution code Version 1.0 -- 06/20/2015
% All rights reserved.
% This work should only be used for nonprofit purposes.
%
% Please cite the paper when you use the code:
% The Code is created based on the method described in the following paper
% [1] "Extended RGB2Gray Conversion Model for Efficient Contrast Preserving Decolorization",
% Qiegen Liu, Jiaojiao Xiong, Li Zhu, Minghui Zhang, Yuhao Wang, Multimedia Tools and Applications, 2016.
% Copyright 2015, Nanchang University.
% The code and the algorithm are for non-comercial use only.

% Three parameters for EGcs(Im,Lpp1, Lpp2,W);
% Lpp1---the parameter tau in the paper
% Lpp2---the parameter p in the paper
% W---the weight parameter space of the R, G ,B channels

clear all;close all;

%% load input image
Imname{8}='8.png'; %'CSDD8.png'; %
load Extended_weiW5;W = Extended_weiW5;
Im = im2double(imread(Imname{8}));

%% EGcs
[gIm1,Es1,bw1] = EGcs(Im,0.001, 1,W);gIm12 = (gIm1- min(gIm1(:)))/(max(gIm1(:)) - min(gIm1(:)));
[gIm2,Es2,bw2] = EGcs(Im,0.005, 1,W);gIm22 = (gIm2- min(gIm2(:)))/(max(gIm2(:)) - min(gIm2(:)));
[gIm3,Es3,bw3] = EGcs(Im,0.01, 1,W);gIm32 = (gIm3- min(gIm3(:)))/(max(gIm3(:)) - min(gIm3(:)));
[gIm4,Es4,bw4] = EGcs(Im,0.1, 1,W);gIm42 = (gIm4- min(gIm4(:)))/(max(gIm4(:)) - min(gIm4(:)));
[gIm5,Es5,bw5] = EGcs(Im,0.5, 1,W);gIm52 = (gIm5- min(gIm5(:)))/(max(gIm5(:)) - min(gIm5(:)));
[gIm6,Es6,bw6] = EGcs(Im,1, 1,W);gIm62 = (gIm6- min(gIm6(:)))/(max(gIm6(:)) - min(gIm6(:)));

%% display the results
imageall = [Im,repmat([gIm12,gIm22,gIm32,gIm42,gIm52,gIm62],[1 1 3])];
figure(1000), imshow(imageall);