private int[][] extractRaw(Bitmap src)
{
int width = (src.Width + 7) / 8 * 8;
int height = (src.Height + 7) / 8 * 8;
// original image
const int N = 8;
int[][] buff1 = RectangularArrays.ReturnRectangularIntArray(height, width); // watermarked image
int[][] buff2 = RectangularArrays.ReturnRectangularIntArray(height, width); // DCT watermarked image coefficients
int[][] b1 = RectangularArrays.ReturnRectangularIntArray(N, N); // DCT input
int[][] b2 = RectangularArrays.ReturnRectangularIntArray(N, N); // DCT output
// watermark
const int W = 4;
int[][] water1 = RectangularArrays.ReturnRectangularIntArray(128, 128); // extract watermark image
int[][] water2 = RectangularArrays.ReturnRectangularIntArray(128, 128); // DCT watermark image coefficients
int[][] water3 = RectangularArrays.ReturnRectangularIntArray(128, 128); // random watermark image
int[][] w1 = RectangularArrays.ReturnRectangularIntArray(W, W); // dequantization output
int[][] w2 = RectangularArrays.ReturnRectangularIntArray(W, W); // DCT input
int[][] w3 = RectangularArrays.ReturnRectangularIntArray(W, W); // DCT output
// random process
int a, b, c, c1;
int[] tmp = new int[128 * 128];
int[] tmp1 = new int[128 * 128];
int cc = 0;
// middle frequency coefficients
// final int mfbuff1[] = new int[128 * 128];
int[] mfbuff1 = new int[width * height];
int[][] mfbuff2 = RectangularArrays.ReturnRectangularIntArray(128, 128); // 1 to 2
// divide 8x8 block
int k = 0, l = 0;
// init buf1 from watermarked image src...
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
if (_stopped)
{
return(null);
}
Color color = new Color();
color = src.GetPixel(x, y);
double[] hsb = RGBtoHSB(color);
// use brightness of the pixel...
buff1[y][x] = (int)(hsb[2] * 255.0);
}
}
for (int y = 0; y < height; y += N)
{
for (int x = 0; x < width; x += N)
{
for (int i = y; i < y + N; i++)
{
for (int j = x; j < x + N; j++)
{
b1[k][l] = buff1[i][j];
l++;
}
l = 0;
k++;
}
k = 0;
DCT o1 = new DCT();
o1.ForwardDCT(b1, b2);
for (int p = y; p < y + N; p++)
{
for (int q = x; q < x + N; q++)
{
buff2[p][q] = b2[k][l];
l++;
}
l = 0;
k++;
}
k = 0;
}
}
for (int i = 0; i < height; i += N)
{
for (int j = 0; j < width; j += N)
{
mfbuff1[cc] = buff2[i + 1][j + 4];
cc++;
mfbuff1[cc] = buff2[i + 2][j + 3];
cc++;
mfbuff1[cc] = buff2[i + 3][j + 2];
cc++;
mfbuff1[cc] = buff2[i + 4][j + 1];
cc++;
}
}
cc = 0;
ZigZag scan = new ZigZag();
scan.one2two(mfbuff1, mfbuff2);
// random extracting
Random r1 = new Random((int)randomizeEmbeddingSeed);
for (int i = 0; i < 128; i++)
{
for (int j = 0; j < 128; j++)
{
while (true)
{
c1 = r1.Next(128 * 128);
if (tmp1[c1] == 0)
{
break;
}
}
a = c1 / 128;
b = c1 % 128;
water1[a][b] = mfbuff2[i][j];
tmp1[c1] = 1;
}
}
k = 0;
l = 0;
for (int y = 0; y < 128; y += W)
{
for (int x = 0; x < 128; x += W)
{
for (int i = y; i < y + W; i++)
{
for (int j = x; j < x + W; j++)
{
w1[k][l] = water1[i][j];
l++;
}
l = 0;
k++;
}
k = 0;
Qt qw2 = new Qt();
qw2.WaterDeQt(w1, w2);
DCT wm2 = new DCT(4);
wm2.InverseDCT(w2, w3);
for (int p = y; p < y + W; p++)
{
for (int q = x; q < x + W; q++)
{
water2[p][q] = w3[k][l];
l++;
}
l = 0;
k++;
}
k = 0;
}
}
Random r = new Random((int)randomizeWatermarkSeed);
for (int i = 0; i < 128; i++)
{
for (int j = 0; j < 128; j++)
{
while (true)
{
c = r.Next(128 * 128);
if (tmp[c] == 0)
{
break;
}
}
a = c / 128;
b = c % 128;
water3[a][b] = water2[i][j];
tmp[c] = 1;
}
}
return(water3);
}
private int[][] embed(Bitmap src, int[][] water1)
{
int width = (src.Width + 7) / 8 * 8;
int height = (src.Height + 7) / 8 * 8;
// original image process
const int N = 8;
int[][] buff1 = RectangularArrays.ReturnRectangularIntArray(height, width); // Original image
int[][] buff2 = RectangularArrays.ReturnRectangularIntArray(height, width); // DCT Original image coefficients
int[][] buff3 = RectangularArrays.ReturnRectangularIntArray(height, width); // IDCT Original image coefficients
int[][] b1 = RectangularArrays.ReturnRectangularIntArray(N, N); // DCT input
int[][] b2 = RectangularArrays.ReturnRectangularIntArray(N, N); // DCT output
int[][] b3 = RectangularArrays.ReturnRectangularIntArray(N, N); // IDCT input
int[][] b4 = RectangularArrays.ReturnRectangularIntArray(N, N); // IDCT output
// watermark image process
const int W = 4;
int[][] water2 = RectangularArrays.ReturnRectangularIntArray(128, 128); // random watermark image
int[][] water3 = RectangularArrays.ReturnRectangularIntArray(128, 128); // DCT watermark image coefficients
int[][] w1 = RectangularArrays.ReturnRectangularIntArray(W, W); // DCT input
int[][] w2 = RectangularArrays.ReturnRectangularIntArray(W, W); // DCT output
int[][] w3 = RectangularArrays.ReturnRectangularIntArray(W, W); // quantization output
int[][] mfbuff1 = RectangularArrays.ReturnRectangularIntArray(128, 128); // embed coefficients
int[] mfbuff2 = new int[width * height]; // 2 to 1
// random process...
int a, b, c;
int[] tmp = new int[128 * 128];
// random embed...
int c1;
int cc = 0;
int[] tmp1 = new int[128 * 128];
// divide 8x8 block...
int k = 0, l = 0;
// init buf1 from src image...
for (int y = 0; y < src.Height; y++)
{
for (int x = 0; x < src.Width; x++)
{
if (_stopped)
{
return(null);
}
Color color = new Color();
color = src.GetPixel(x, y);
double[] hsb = RGBtoHSB(color);
// use brightness of the pixel...
buff1[y][x] = (int)(hsb[2] * 255.0);
}
}
for (int y = 0; y < height; y += N)
{
for (int x = 0; x < width; x += N)
{
for (int i = y; i < y + N; i++)
{
for (int j = x; j < x + N; j++)
{
b1[k][l] = buff1[i][j];
l++;
}
l = 0;
k++;
}
k = 0;
DCT o1 = new DCT();
o1.ForwardDCT(b1, b2);
for (int p = y; p < y + N; p++)
{
for (int q = x; q < x + N; q++)
{
buff2[p][q] = b2[k][l];
l++;
}
l = 0;
k++;
}
k = 0;
}
}
Random r = new Random((int)randomizeWatermarkSeed);
for (int i = 0; i < 128; i++)
{
for (int j = 0; j < 128; j++)
{
while (true)
{
c = r.Next(128 * 128);
if (tmp[c] == 0)
{
break;
}
}
a = c / 128;
b = c % 128;
water2[i][j] = water1[a][b];
tmp[c] = 1;
}
}
k = 0;
l = 0;
for (int y = 0; y < 128; y += W)
{
for (int x = 0; x < 128; x += W)
{
for (int i = y; i < y + W; i++)
{
for (int j = x; j < x + W; j++)
{
w1[k][l] = water2[i][j];
l++;
}
l = 0;
k++;
}
k = 0;
DCT wm1 = new DCT(4);
wm1.ForwardDCT(w1, w2);
Qt qw1 = new Qt();
qw1.WaterQt(w2, w3);
for (int p = y; p < y + W; p++)
{
for (int q = x; q < x + W; q++)
{
water3[p][q] = w3[k][l];
l++;
}
l = 0;
k++;
}
k = 0;
}
}
// Random Embedding
Random r1 = new Random((int)randomizeEmbeddingSeed);
for (int i = 0; i < 128; i++)
{
for (int j = 0; j < 128; j++)
{
while (true)
{
c1 = r1.Next(128 * 128);
if (tmp1[c1] == 0)
{
break;
}
}
a = c1 / 128;
b = c1 % 128;
mfbuff1[i][j] = water3[a][b];
tmp1[c1] = 1;
}
}
ZigZag scan = new ZigZag();
scan.two2one(mfbuff1, mfbuff2);
// WriteBack coefficients
for (int i = 0; i < height; i += N)
{
for (int j = 0; j < width; j += N)
{
buff2[i + 1][j + 4] = mfbuff2[cc];
cc++;
buff2[i + 2][j + 3] = mfbuff2[cc];
cc++;
buff2[i + 3][j + 2] = mfbuff2[cc];
cc++;
buff2[i + 4][j + 1] = mfbuff2[cc];
cc++;
}
}
cc = 0;
k = 0;
l = 0;
for (int y = 0; y < height; y += N)
{
for (int x = 0; x < width; x += N)
{
for (int i = y; i < y + N; i++)
{
for (int j = x; j < x + N; j++)
{
b3[k][l] = buff2[i][j];
l++;
}
l = 0;
k++;
}
k = 0;
DCT o2 = new DCT();
o2.InverseDCT(b3, b4);
for (int p = y; p < y + N; p++)
{
for (int q = x; q < x + N; q++)
{
buff3[p][q] = b4[k][l];
l++;
}
l = 0;
k++;
}
k = 0;
}
}
return(buff3);
}