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CoF_GF_decomposition.m

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+function [S,L,B] = CoF_GF_decomposition(PAN,I)
+
+% GF
+N = 4;
+sigma = 10;
+GaussianFilter = fspecial('gaussian',[2*N+1, 2*N+1],sigma);
+Ig = imfilter(PAN,GaussianFilter,'conv');
+
+% CoF
+params.sigma_s=5;  % 5
+params.sigma_oc=10;  % 10
+Ic = CoOcurFilter(PAN,params);
+S = PAN-Ic;
+L = Ic-Ig;
+B_uint8 = Ig;
+B = im2double(B_uint8);
+I = im2double(I);
+
+eps = 0.1;
+win_size = 11;
+B = guided_filter(B,I,eps,win_size);

PCNN_withParameters.m

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+function R=PCNN_withParameters(matrix,Para)
+
+link_arrange=Para.link_arrange;
+np=Para.iterTimes;
+alpha_L=Para.alpha_L;
+alpha_Theta=Para.alpha_Theta ;
+beta=Para.beta;
+vL=Para.vL;
+vTheta=Para.vTheta;
+%=============================================================
+[p,q]=size(matrix);
+F_NA=abs(matrix);
+
+L=zeros(p,q);
+U=zeros(p,q);
+Y=zeros(p,q);
+Y0=zeros(p,q);
+Theta=zeros(p,q);
+% Compute the linking strength.
+center_x=round(link_arrange/2);
+center_y=round(link_arrange/2);
+W=zeros(link_arrange,link_arrange);
+for i=1:link_arrange
+    for j=1:link_arrange
+        if (i==center_x)&&(j==center_y)
+            W(i,j)=0;
+        else
+            W(i,j)=1./sqrt((i-center_x).^2+(j-center_y).^2);
+        end
+    end
+end
+%%%%%%%%%%%%%%%%%%%%%%%%%%%
+F=F_NA;
+for n=1:np
+    K=conv2(Y,W,'same');
+    L=exp(-alpha_L)*L+vL*K;
+    Theta=exp(-alpha_Theta)*Theta+vTheta*Y;
+    U=F.*(1+beta*L);
+    Y=im2double(U>Theta);
+    Y0=Y0+Y;   
+end
+R=Y0;

README.txt

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+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+This package contains the code which is associated with the following paper:
+
+Wei Tan, Pei Xiang Jiajia Zhang, Huixin Zhou, and Hanlin Qin,
+"Remote Sensing Image Fusion via Boundary Measured Dual-Channel PCNN in Multi-Scale Morphological Gradient Domain", IEEE Access，vol. 8, pp. 42540-42549, 2020
+doi: https://doi.org/10.1109/ACCESS.2020.2977299
+
+
+Edited by Wei Tan, March 7, 2020.
+
+This code is only used for research purposes.
+
+Please refer to the above publication if you use this code.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+The demo file is script.m
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

fusion_CoF_MSMG_PCNN.m

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+function cp=fusion_CoF_MSMG_PCNN(matrixA,matrixB)
+
+%% Initialize parameter
+Para.iterTimes=200;
+Para.link_arrange=7;
+Para.alpha_L=0.02;
+Para.alpha_Theta=3;
+Para.beta=3;
+Para.vL=1;
+Para.vTheta=20;
+t = 11;
+
+%%
+MSMG_A=multiscale_morph(abs(matrixA),t);
+MSMG_B=multiscale_morph(abs(matrixB),t);
+
+%%
+PCNN_timesA=PCNN_withParameters(MSMG_A,Para);
+PCNN_timesB=PCNN_withParameters(MSMG_B,Para);
+map=(PCNN_timesA>=PCNN_timesB);
+
+%%
+cp=map.*matrixA+~map.*matrixB;

imtransfer.m

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+function [I_MS,I_PAN] = imtransfer(cropped_im,cropped_pan)
+
+MS = cropped_im(:,:,1:3);
+I_MS = subsample(MS);
+% I_MS = double(I_MS)/255;
+
+PAN = cropped_pan;
+I_PAN = subsample(PAN);
+% I_PAN = double(I_PAN)/255;

multiscale_morph.m

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+function FM = multiscale_morph(img, num)
+%========================================================================
+%This is a function to compute the multiscale morphological focus-measure
+%Input: 
+%       img: the input image
+%     scale: the number of the scales
+%Output:
+%        FM: Focus-measure
+%========================================================================
+img = double(img);
+FM = double(zeros(size(img))); 
+
+for ii = 1 : num
+    scale = 2 * ii + 1;
+    se = strel('disk', scale);
+    % one scale focus-measure
+    g = imdilate(img, se) - imerode(img, se);
+    % the composite focus-measure
+	FM = FM + 1 / scale *(g);
+end
+
+return

script.m

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+% ----------
+% Author: Wei Tan
+% E-mail: [email protected]
+% Wei Tan, Pei Xiang, Jiajia Zhang, Huixin Zhou, and Hanlin Qin
+% "Remote Sensing Image Fusion via Boundary Measured Dual-Channel PCNN in
+% Multi-Scale Morphological Gradient Domain",
+% IEEE Access, vol.8, pp.42540-42549, 2020
+% doi: https://doi.org/10.1109/ACCESS.2020.2977299
+% This code is only used for research.
+% Please cite this publication if you use this code.
+
+clear;clc;
+close all;
+
+path(path,'CoOccurFilter-master')
+
+load 1_ms
+load 1_pan
+
+[MS,PAN] = imtransfer(cropped_im,cropped_gray);
+
+M = imresize(MS,2,'bicubic');
+M_hsv = rgb2hsv(M);
+I = M_hsv(:,:,3);
+I_uint8 = im2uint8(I);
+
+[S,L,B] = CoF_GF_decomposition(PAN,I_uint8);
+
+Fc = fusion_CoF_MSMG_PCNN(B,I);
+S = im2double(S);
+L = im2double(L);
+Fi = Fc+S+L;
+M_hsv(:,:,3) = Fi;
+F_pr = hsv2rgb(M_hsv);
+F = im2uint8(F_pr);
+
+figure,imshow(MS);title('200*200 MS image')
+figure,imshow(PAN);title('400*400 PAN image')
+figure,imshow(F);title('Fused image')

subsample.m

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+function r = subsample(im)
+% 下采样
+% im-输入图像，r-输出图像
+
+[m,n,z] = size(im);
+r = im(2:2:m,2:2:n,:);