public static double[][] AddRandom(double[][] picture, int percent)
{
int W = picture[0].GetLength(0);
int H = picture.GetLength(0);
LCG random = new LCG();
for (int y = 0; y < H; y++)
{
for (int x = 0; x < W; x++)
{
int rnd = random.Next(-100, 99);
if (rnd < 0)
{
rnd = -1;
}
if (rnd >= 0)
{
rnd = 1;
}
int possibility = random.Next(1, 100);
if (possibility <= percent)
{
picture[y][x] = picture[y][x] + rnd * 30;
}
}
}
picture = ThresholdFun(picture, 0, 255);
return(picture);
}
public static double[][] AddSP(double[][] picture, int percent)
{
int W = picture[0].GetLength(0);
int H = picture.GetLength(0);
LCG random = new LCG();
for (int y = 0; y < H; y++)
{
for (int x = 0; x < W; x++)
{
int possibility = random.Next(1, 100);
if (possibility <= percent)
{
int rnd = random.Next(0, 255);
if (rnd < 128)
{
picture[y][x] = 0;
}
if (rnd >= 128)
{
picture[y][x] = 255;
}
}
}
}
picture = ThresholdFun(picture, 0, 255);
return(picture);
}