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Commit c1ebcae

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Encryption and decryption is done in one file 😃
1 parent 91cd0ad commit c1ebcae

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1 file changed

+104
-29
lines changed

1 file changed

+104
-29
lines changed

‎encryption.cpp

Lines changed: 104 additions & 29 deletions
Original file line numberDiff line numberDiff line change
@@ -1,53 +1,128 @@
11
#include <stdio.h>
2+
#include <bits/stdc++.h>
23
#include <opencv2/opencv.hpp>
34

45
using namespace cv;
56
using namespace std;
67

78
const int MAX=1e4+79;
9+
bool flag[513][513];
810

911
int main()
1012
{
11-
Mat image;
12-
double x[102];
13-
double u; //u is the control parameter for chaotic map,also known as population rate
13+
Mat image;
14+
vector<pair<double,int >> x;
15+
double u=3.94,hold,temp; //u is the control parameter for chaotic map,also known as population rate
1416

15-
image = imread( "Image.jpg", 1 );
17+
image = imread( "Image/sample_image_grey.jpg", 1 );
1618
if ( !image.data )
1719
{
18-
cout<<"No image data \n";
19-
return -1;
20+
cout<<"No image data \n";
21+
return -1;
2022
}
21-
//Applying Logistic map
22-
u=3.94; //It is the condition for logistic map
23-
x[0]=0.4; //Base condition for logistic map
24-
for (int i = 1; i <= 100; ++i)
25-
x[i]=u*x[i-1]*(1-x[i-1]);
26-
sort(x,x+100);
27-
28-
// reading image pixel
23+
24+
x.push_back({0.4,0});
25+
memset(flag ,false,sizeof(flag));
26+
27+
for (int i = 1; i <= 511; ++i){
28+
temp=x[i-1].first;
29+
hold=u*temp*(1-temp);
30+
x.push_back({hold,i});
31+
}
32+
sort(x.begin(), x.end());
33+
2934
int i=1;
3035
int l;
3136

37+
imshow("Shubham@shaurya", image);
38+
waitKey(0);
39+
40+
i=0;
41+
int holds[4];
3242
for(int r = 0; r < image.rows; ++r) {
33-
for(int c = 0; c < image.cols; ++c) {
34-
if(i>100){
35-
i=1;
36-
}
37-
l=x[i]*MAX;
38-
l=l%255;
39-
// cout << "Pixel at position (x, y) : (" << c << ", " << r << ") =";
40-
image.at<Vec3b>(r,c)[0]=image.at<Vec3b>(r,c)[0]^l;
41-
image.at<Vec3b>(r,c)[1]=image.at<Vec3b>(r,c)[1]^l;
42-
image.at<Vec3b>(r,c)[2]=image.at<Vec3b>(r,c)[2]^l;
43-
i++;
44-
}
43+
for(int c = 0; c < image.cols; ++c) {
44+
if(i>511)
45+
i=0;
46+
int temps= x[i].second;
47+
48+
holds[0]= image.at<Vec3b>(r,temps)[0];
49+
image.at<Vec3b>(r,temps)[0]=image.at<Vec3b>(r,c)[0];
50+
image.at<Vec3b>(r,c)[0]=holds[0];
51+
52+
holds[1]= image.at<Vec3b>(r,temps)[1];
53+
image.at<Vec3b>(r,temps)[1]=image.at<Vec3b>(r,c)[1];
54+
image.at<Vec3b>(r,c)[1]=holds[1];
55+
56+
57+
holds[2]= image.at<Vec3b>(r,temps)[2];
58+
image.at<Vec3b>(r,temps)[2]=image.at<Vec3b>(r,c)[2];
59+
image.at<Vec3b>(r,c)[2]=holds[2];
60+
61+
i++;
62+
}
4563
}
46-
47-
imwrite("encryptedImage.jpg",image);
64+
65+
for(int r = 0; r < image.rows; ++r) {
66+
for(int c = 0; c < image.cols; ++c) {
67+
if(i>100){
68+
i=1;
69+
}
70+
l=x[i].first*MAX;
71+
l=l%255;
72+
image.at<Vec3b>(r,c)[0]=image.at<Vec3b>(r,c)[0]^l;
73+
image.at<Vec3b>(r,c)[1]=image.at<Vec3b>(r,c)[1]^l;
74+
image.at<Vec3b>(r,c)[2]=image.at<Vec3b>(r,c)[2]^l;
75+
i++;
76+
}
77+
}
78+
79+
80+
imwrite("Image/encrypted_image.jpg",image);
81+
imshow("Shubham@shaurya", image);
82+
waitKey(0);
83+
84+
i=1;
85+
for(int r = 0; r < image.rows; ++r) {
86+
for(int c = 0; c < image.cols; ++c) {
87+
if(i>100){
88+
i=1;
89+
}
90+
l=x[i].first*MAX;
91+
l=l%255;
92+
image.at<Vec3b>(r,c)[0]=image.at<Vec3b>(r,c)[0]^l;
93+
image.at<Vec3b>(r,c)[1]=image.at<Vec3b>(r,c)[1]^l;
94+
image.at<Vec3b>(r,c)[2]=image.at<Vec3b>(r,c)[2]^l;
95+
i++;
96+
}
97+
}
98+
99+
i=511;
100+
for(int r = image.rows-1; r >= 0; --r) {
101+
for(int c = image.cols-1; c >= 0 ; --c) {
102+
if(i<0)
103+
i=511;
104+
int temps= x[i].second;
105+
106+
holds[0]= image.at<Vec3b>(r,temps)[0];
107+
image.at<Vec3b>(r,temps)[0]=image.at<Vec3b>(r,c)[0];
108+
image.at<Vec3b>(r,c)[0]=holds[0];
109+
110+
holds[1]= image.at<Vec3b>(r,temps)[1];
111+
image.at<Vec3b>(r,temps)[1]=image.at<Vec3b>(r,c)[1];
112+
image.at<Vec3b>(r,c)[1]=holds[1];
113+
114+
115+
holds[2]= image.at<Vec3b>(r,temps)[2];
116+
image.at<Vec3b>(r,temps)[2]=image.at<Vec3b>(r,c)[2];
117+
image.at<Vec3b>(r,c)[2]=holds[2];
118+
119+
i--;
120+
}
121+
}
122+
48123
namedWindow("Shubham@shaurya", WINDOW_AUTOSIZE );
49124
imshow("Shubham@shaurya", image);
50125
waitKey(0);
51126

52127
return 0;
53-
}
128+
}

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