commit 252b8d9386c9acf4c76a9eaed60a3439db7f98bb
Author: sanwu4617 <55657661+sanwu4617@users.noreply.github.com>
Date:   Wed Nov 22 13:56:17 2023 +0800

    Add files via upload

diff --git a/SetBlackWhite.m b/SetBlackWhite.m
new file mode 100644
index 0000000..6f428ba
--- /dev/null
+++ b/SetBlackWhite.m
@@ -0,0 +1,30 @@
+function [ x ] = SetBlackWhite( A )
+%UNTITLED 此处显示有关此函数的摘要
+%   此处显示详细说明
+    [m,n]=size(A);
+    for i=1:m
+        for j=1:n
+            if(A(i,j)>=128)
+                delta=A(i,j)-255;
+                A(i,j)=255;
+            else
+                delta=A(i,j);
+                A(i,j)=0;
+            end;
+            if(j<n)
+                A(i,j+1)=A(i,j+1)+delta*7/16;
+            end;
+            if(j<n && i<m)
+                A(i+1,j+1)=A(i+1,j+1)+delta*1/16;
+            end;
+            if(i<m)
+                A(i+1,j)=A(i+1,j)+delta*5/16;
+            end;
+            if(i<m && j>1)
+                A(i+1,j-1)=A(i+1,j-1)+delta*3/16;
+            end;
+        end;
+    end;
+    x=A;
+end
+
diff --git a/black_white.m b/black_white.m
new file mode 100644
index 0000000..32e068d
--- /dev/null
+++ b/black_white.m
@@ -0,0 +1,61 @@
+A=imread('test1.png');
+A=rgb2gray(A);
+[m,n]=size(A);
+two1=uint8([255,255;0,0]);
+two2=uint8([255,0;255,0]);
+two3=uint8([255,0;0,255]);
+two4=uint8([0,255;255,0]);
+two5=uint8([0,255;0,255]);
+two6=uint8([0,0;255,255]);
+ans1=int8(floor(unifrnd(1,7,m,n)));
+image1=uint8(zeros(2*m,2*n));
+image2=uint8(zeros(2*m,2*n));
+for i=1:m
+    for j=1:n
+        if(A(i,j)>=128)  %表示白色
+            switch ans1(i,j)
+            case 1
+                image1(2*i-1:2*i,2*j-1:2*j)=two1;
+                image2(2*i-1:2*i,2*j-1:2*j)=two1;
+            case 2
+                image1(2*i-1:2*i,2*j-1:2*j)=two2;
+                image2(2*i-1:2*i,2*j-1:2*j)=two2;
+            case 3
+                image1(2*i-1:2*i,2*j-1:2*j)=two3;
+                image2(2*i-1:2*i,2*j-1:2*j)=two3;
+            case 4
+                image1(2*i-1:2*i,2*j-1:2*j)=two4;
+                image2(2*i-1:2*i,2*j-1:2*j)=two4;
+            case 5
+                image1(2*i-1:2*i,2*j-1:2*j)=two5;
+                image2(2*i-1:2*i,2*j-1:2*j)=two5;
+            otherwise
+                image1(2*i-1:2*i,2*j-1:2*j)=two6;
+                image2(2*i-1:2*i,2*j-1:2*j)=two6;
+            end;
+        else
+            switch ans1(i,j)
+            case 1
+                image1(2*i-1:2*i,2*j-1:2*j)=two1;
+                image2(2*i-1:2*i,2*j-1:2*j)=two6;
+            case 2
+                image1(2*i-1:2*i,2*j-1:2*j)=two2;
+                image2(2*i-1:2*i,2*j-1:2*j)=two5;
+            case 3
+                image1(2*i-1:2*i,2*j-1:2*j)=two3;
+                image2(2*i-1:2*i,2*j-1:2*j)=two4;
+            case 4
+                image1(2*i-1:2*i,2*j-1:2*j)=two4;
+                image2(2*i-1:2*i,2*j-1:2*j)=two3;
+            case 5
+                image1(2*i-1:2*i,2*j-1:2*j)=two5;
+                image2(2*i-1:2*i,2*j-1:2*j)=two2;
+            otherwise
+                image1(2*i-1:2*i,2*j-1:2*j)=two6;
+                image2(2*i-1:2*i,2*j-1:2*j)=two1;
+            end;
+        end;
+    end;
+end;
+imwrite(image1,'bw_image1.png');
+imwrite(image2,'bw_image2.png');
\ No newline at end of file
diff --git a/color.m b/color.m
new file mode 100644
index 0000000..9a8a5a0
--- /dev/null
+++ b/color.m
@@ -0,0 +1,116 @@
+A=imread('test3.png');
+A=uint16(A);
+[m,n,p]=size(A);
+two1=uint8([255,255;0,0]);
+two2=uint8([255,0;255,0]);
+two3=uint8([255,0;0,255]);
+two4=uint8([0,255;255,0]);
+two5=uint8([0,255;0,255]);
+two6=uint8([0,0;255,255]);
+ans1=int8(floor(unifrnd(1,7,m,n,3)));
+image1=uint8(zeros(2*m,2*n,3));
+image2=uint8(zeros(2*m,2*n,3));
+for i=1:m
+    for j=1:n
+        for k=1:3
+            if(A(i,j,k)>=128)
+                delta=A(i,j,k)-255;
+                A(i,j,k)=255;
+            else
+                delta=A(i,j,k);
+                A(i,j,k)=0;
+            end;
+            if(j<n)
+                A(i,j+1,k)=A(i,j+1,k)+delta*7/16;
+            end;
+            if(j<n && i<m)
+                A(i+1,j+1,k)=A(i+1,j+1,k)+delta*1/16;
+            end;
+            if(i<m)
+                A(i+1,j,k)=A(i+1,j,k)+delta*5/16;
+            end;
+            if(i<m && j>1)
+                A(i+1,j-1,k)=A(i+1,j-1,k)+delta*3/16;
+            end;
+        end;
+    end;
+end;
+imwrite(uint8(A),'test3_1.png');
+for i=1:m
+    for j=1:n
+        for k=1:3
+            if(A(i,j,k)<128)  %表示浅色
+                switch ans1(i,j,k)
+                case 1
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two1;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two1;
+                case 2
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two2;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two2;
+                case 3
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two3;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two3;
+                case 4
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two4;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two4;
+                case 5
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two5;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two5;
+                otherwise
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two6;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two6;
+                end;
+            else
+                switch ans1(i,j,k)
+                case 1
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two1;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two6;
+                case 2
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two2;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two5;
+                case 3
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two3;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two4;
+                case 4
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two4;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two3;
+                case 5
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two5;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two2;
+                otherwise
+                    image1(2*i-1:2*i,2*j-1:2*j,k)=two6;
+                    image2(2*i-1:2*i,2*j-1:2*j,k)=two1;
+                end;
+            end;
+        end;
+    end;
+end;
+imwrite(image1,'color_image1.png');
+imwrite(image2,'color_image2.png');
+%下面合成图像
+image1=uint16(image1);
+image2=uint16(image2);
+image_overlie=uint8(zeros(2*m,2*n,3));
+image_compose=uint8(zeros(m,n,3));
+for i=1:2*m
+    for j=1:2*n
+        for k=1:3
+            image_overlie(i,j,k)=image1(i,j,k)+image2(i,j,k);
+        end;
+    end;
+end;
+for i=1:m
+    for j=1:n
+        for k=1:3
+            a=uint16(image_overlie(2*i-1,2*j-1,k))+uint16(image_overlie(2*i-1,2*j,k))+ ...
+                uint16(image_overlie(2*i,2*j-1,k))+uint16(image_overlie(2*i,2*j,k));
+            if(a<512)   %注意：图像叠加时，
+                image_compose(i,j,k)=0;
+            else
+                image_compose(i,j,k)=255;
+            end;
+        end;
+    end;
+end;
+imwrite(image_overlie,'image_overlie.png');
+imwrite(image_compose,'image_compose.png');
\ No newline at end of file
diff --git a/gray.m b/gray.m
new file mode 100644
index 0000000..2193b47
--- /dev/null
+++ b/gray.m
@@ -0,0 +1,87 @@
+A=imread('test2.png');
+A1=rgb2gray(A);
+A=uint16(A1);
+[m,n]=size(A);
+two1=uint8([255,255;0,0]);
+two2=uint8([255,0;255,0]);
+two3=uint8([255,0;0,255]);
+two4=uint8([0,255;255,0]);
+two5=uint8([0,255;0,255]);
+two6=uint8([0,0;255,255]);
+ans1=int8(floor(unifrnd(1,7,m,n)));
+image1=uint8(zeros(2*m,2*n));
+image2=uint8(zeros(2*m,2*n));
+for i=1:m
+    for j=1:n
+        if(A(i,j)>=128)
+            delta=A(i,j)-255;
+            A(i,j)=255;
+        else
+            delta=A(i,j);
+            A(i,j)=0;
+        end;
+        if(j<n)
+            A(i,j+1)=A(i,j+1)+delta*7/16;
+        end;
+        if(j<n && i<m)
+            A(i+1,j+1)=A(i+1,j+1)+delta*1/16;
+        end;
+        if(i<m)
+            A(i+1,j)=A(i+1,j)+delta*5/16;
+        end;
+        if(i<m && j>1)
+            A(i+1,j-1)=A(i+1,j-1)+delta*3/16;
+        end;
+        
+    end;
+end;
+imwrite(uint8(A),'test2_blackwhite.png');
+for i=1:m
+    for j=1:n
+        if(A(i,j)>=128)  %表示白色
+            switch ans1(i,j)
+            case 1
+                image1(2*i-1:2*i,2*j-1:2*j)=two1;
+                image2(2*i-1:2*i,2*j-1:2*j)=two1;
+            case 2
+                image1(2*i-1:2*i,2*j-1:2*j)=two2;
+                image2(2*i-1:2*i,2*j-1:2*j)=two2;
+            case 3
+                image1(2*i-1:2*i,2*j-1:2*j)=two3;
+                image2(2*i-1:2*i,2*j-1:2*j)=two3;
+            case 4
+                image1(2*i-1:2*i,2*j-1:2*j)=two4;
+                image2(2*i-1:2*i,2*j-1:2*j)=two4;
+            case 5
+                image1(2*i-1:2*i,2*j-1:2*j)=two5;
+                image2(2*i-1:2*i,2*j-1:2*j)=two5;
+            otherwise
+                image1(2*i-1:2*i,2*j-1:2*j)=two6;
+                image2(2*i-1:2*i,2*j-1:2*j)=two6;
+            end;
+        else
+            switch ans1(i,j)
+            case 1
+                image1(2*i-1:2*i,2*j-1:2*j)=two1;
+                image2(2*i-1:2*i,2*j-1:2*j)=two6;
+            case 2
+                image1(2*i-1:2*i,2*j-1:2*j)=two2;
+                image2(2*i-1:2*i,2*j-1:2*j)=two5;
+            case 3
+                image1(2*i-1:2*i,2*j-1:2*j)=two3;
+                image2(2*i-1:2*i,2*j-1:2*j)=two4;
+            case 4
+                image1(2*i-1:2*i,2*j-1:2*j)=two4;
+                image2(2*i-1:2*i,2*j-1:2*j)=two3;
+            case 5
+                image1(2*i-1:2*i,2*j-1:2*j)=two5;
+                image2(2*i-1:2*i,2*j-1:2*j)=two2;
+            otherwise
+                image1(2*i-1:2*i,2*j-1:2*j)=two6;
+                image2(2*i-1:2*i,2*j-1:2*j)=two1;
+            end;
+        end;
+    end;
+end;
+imwrite(image1,'gray_image1.png');
+imwrite(image2,'gray_image2.png');
\ No newline at end of file
diff --git a/image_covering_gray.m b/image_covering_gray.m
new file mode 100644
index 0000000..8d33f79
--- /dev/null
+++ b/image_covering_gray.m
@@ -0,0 +1,154 @@
+key1_image=rgb2gray(imread('a.png'));
+key2_image=rgb2gray(imread('b.png'));
+cipher_image=rgb2gray(imread('test1.png'));
+[m,n]=size(key1_image);
+two1=uint8([255,255;0,0]);
+two2=uint8([255,0;255,0]);
+two3=uint8([255,0;0,255]);
+two4=uint8([0,255;255,0]);
+two5=uint8([0,255;0,255]);
+two6=uint8([0,0;255,255]);
+three1=uint8([255,0;0,0]);
+three2=uint8([0,255;0,0]);
+three3=uint8([0,0;255,0]);
+three4=uint8([0,0;0,255]);
+ans1=int8(floor(unifrnd(1,5,m,n)));
+key1=uint8(zeros(2*m,2*n));
+key2=uint8(zeros(2*m,2*n));
+key1_image=SetBlackWhite(key1_image);
+key2_image=SetBlackWhite(key2_image);
+cipher_image=SetBlackWhite(cipher_image);
+%imwrite(key1_image,'key1_image1.png');
+%imwrite(key2_image,'key2_image1.png');
+%imwrite(cipher_image,'cipher_image1.png');
+temps=uint8(zeros(m,n));
+for i=1:m
+    for j=1:n
+        temp=key1_image(i,j)/255*4+key2_image(i,j)/255*2+cipher_image(i,j)/255;
+        temps(i,j)=temp;
+        switch temp
+            case 0
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=three1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three3;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=three2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three4;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=three3;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three1;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=three4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three2;
+                end;
+            case 1
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=three1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three1;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=three2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three2;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=three3;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three3;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=three4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three4;
+                end;
+            case 2
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=three1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two4;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=three2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two2;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=three3;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two3;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=three4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two1;
+                end;
+            case 3
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=three1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two1;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=three2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two5;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=three3;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two6;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=three4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two3;
+                end;
+            case 4
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=two4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three1;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=two6;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three2;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=two5;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three3;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=two2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three4;
+                end;
+            case 5
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=two1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three1;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=two4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three2;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=two6;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three3;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=two3;
+                        key2(2*i-1:2*i,2*j-1:2*j)=three4;
+                end;
+            case 6
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=two1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two6;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=two2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two5;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=two3;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two4;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=two4;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two3;
+                end;
+            case 7
+                switch ans1(i,j)
+                    case 1
+                        key1(2*i-1:2*i,2*j-1:2*j)=two1;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two2;
+                    case 2
+                        key1(2*i-1:2*i,2*j-1:2*j)=two2;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two3;
+                    case 3
+                        key1(2*i-1:2*i,2*j-1:2*j)=two5;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two4;
+                    case 4
+                        key1(2*i-1:2*i,2*j-1:2*j)=two6;
+                        key2(2*i-1:2*i,2*j-1:2*j)=two5;
+                end;
+        end;
+    end;
+end;
+imwrite(key1,'key1.png');
+imwrite(key2,'key2.png');
\ No newline at end of file