public static BMPReader to_grey(BMPReader image)
{
for (int i = 0; i < image.height; i++)
{
for (int j = 0; j < image.width; j++)
{
Color color = image.get_pixel(j, i);
int grey = (int)(color.R * .3f + color.G * .59 + color.B * .11);
image.set_pixel(j, i, Color.FromArgb(grey, grey, grey, grey));
}
}
return(image);
}
public static BMPReader binarize(BMPReader image, int threshold)
{
for (int i = 0; i < image.height; i++)
{
for (int j = 0; j < image.width; j++)
{
Color color = image.get_pixel(j, i);
if ((color.R + color.G + color.B) / 3 < threshold)
{
image.set_pixel(j, i, Color.White);
}
else
{
image.set_pixel(j, i, Color.Black);
}
}
}
return(image);
}
static void Main(string[] args)
{
BMPReader bmp1 = new BMPReader("24bit.bmp");
BMPReader bmp = new BMPReader("lena.bmp");
BMPReader bmp2 = new BMPReader("a.bmp");
BMPReader bmp3 = new BMPReader("b.bmp");
BMPReader bmp4 = new BMPReader("black.bmp");
bmp2.display_header();/*
* for (int i = 0; i < bmp.width; i++)
* {
* for (int j = 0; j < bmp.height; j++)
* {
* if (Math.Pow(i - 300, 2) + Math.Pow(j -300, 2) <= Math.Pow(200, 2) + 800 && Math.Pow(i - 300, 2) + Math.Pow(j - 300, 2) >= Math.Pow(200, 2) - 800)
* {
* bmp.set_pixel(i, j, Color.Magenta);
* }
* }
* }*/
binarize(bmp, 150);
to_grey(bmp1);
to_grey(bmp2);
/*float[,] mat = new float[3, 3] { { 0, 1, 0 },
* { 0, 0, 0 },
* { 0, 0, 0 } };*/
/*float [,] mat = new float[3, 3] { { -1, -1, -1 },
* { -1, 4, -1 },
* { -1, -1, -1 } };*/
/*float[,] mat = new float[3, 3] { { -2, -2, 0 },
* { -2, 7, 7 },
* { 0, 7, 4 } };*/
/*float[,] mat = new float[5, 5] { { .1f, .1f, .1f , .1f, .1f},
* { .1f, .0f, .0f , .0f, .1f},
* { .1f, .0f, .3f , .0f, .1f},
* { .1f, .0f, .0f , .0f, .1f},
* { .1f, .1f, .1f , .1f, .1f}};*/
float[,] mat = new float[5, 3] {
{ -4, -4, 0 },
{ 0, 6, 6 },
{ 3, 0, 3 },
{ 3, -3, 3 },
{ -6, -6, 0 }
};
/*float[,] mat = new float[3, 3] { { .4f, .3f, .3f },
* { .3f, 0, .3f },
* { .3f, .3f, .4f } };*/
/*float[,] mat = new float[3, 3] { { .6f, .2f, 0f },
* { .2f, 0, .2f },
* { 0f, .2f, .6f } };*/
convolution(bmp1, mat);
Stegano test = new Stegano(bmp2);
test.stegano_hide("coucou comment vas tu ? pour ma part j'écris des message dans des images!!!");
Console.WriteLine(test.stegano_find());
/*test.stegano_encipher("c", "a");
* Console.WriteLine(test.stegano_decipher("a"));*/
bmp.save("clone.bmp");
bmp1.save("clone1.bmp");
bmp2.save("clone2.bmp");
bmp3.save("clone3.bmp");
bmp4.save("clone4.bmp");
Console.WriteLine((int)'Z');
Console.ReadLine();
}
public Stegano(BMPReader img)
{
this.img = img;
}
