public static FastBitmap Hide(FastBitmap bmp1, FastBitmap bmp2)
{
FastBitmap bmpSecret = new FastBitmap((Bitmap)bmp2.Bitmap.Clone());
Threshold(bmpSecret, 127);
FastBitmap bmp = new FastBitmap(bmp1.Width, bmp1.Height);
for (int i = 0; i < bmp1.Width; ++i)
{
for (int j = 0; j < bmp1.Height; ++j)
{
int newColor = bmp1[i, j].R & (0xFE);
if (i < bmpSecret.Width && j < bmpSecret.Height)
{
newColor |= bmpSecret[i, j].R == 0 ? 0x00 : 0x01;
}
bmp[i, j] = Color.FromArgb(newColor, newColor, newColor);
}
}
return(bmp);
}
public UPOForm()
{
InitializeComponent();
ClientSize = new Size(276, 276 + statusStrip1.Height + buttonOK.Height + 10);
graphicsPanel.Size = new Size(256, 256);
graphicsPanel.Left = 10;
graphicsPanel.Top = 10;
graphics = graphicsPanel.CreateGraphics();
buttonOK.Top = 276;
buttonCancel.Top = 276;
upo = new byte[256];
for (int i = 0; i < 256; ++i)
{
upo[i] = (byte)i;
}
upoImage = new FastBitmap(256, 256);
graphicsImage = upoImage.CreateGraphics();
RedrawImage();
}
private void adaptiveTresholdToolStripMenuItem_Click(object sender, EventArgs e)
{
valueForm = new ValueForm(3, 21, "Enter the matrix size", false, true);
if (valueForm.ShowDialog() == DialogResult.OK)
{
FastBitmap bmp = ((ImageForm)ActiveMdiChild).Image;
int size = valueForm.Value / 2;
for (int i = size; i < bmp.Width - size; ++i)
{
for (int j = size; j < bmp.Height - size; ++j)
{
int mean = 0;
for (int k = i - size; k < i + size + 1; ++k)
{
for (int l = j - size; l < j + size + 1; ++l)
{
mean += bmp[k, l].R;
}
}
mean /= (2 * size + 1) * (2 * size + 1);
if (bmp[i, j].R >= mean)
{
bmp[i, j] = Color.FromArgb(255, 255, 255, 255);
}
else
{
bmp[i, j] = Color.FromArgb(255, 0, 0, 0);
}
}
}
}
((ImageForm)ActiveMdiChild).Refresh();
((ImageForm)ActiveMdiChild).Changed = true;
}
public static FastBitmap Dylatacja(FastBitmap bmp, Spojnosc spojnosc)
{
int i, j, pam;
int[,] dilate = new int[bmp.Width, bmp.Height];
int[,] tab = new int[bmp.Width, bmp.Height];
for (int y = 0; y < bmp.Height; y++)
{
for (int x = 0; x < bmp.Width; x++)
{
tab[x, y] = bmp[x, y].G;
}
}
for (i = 1; i < bmp.Height - 1; i++)
{
for (j = 1; j < bmp.Width - 1; j++)
{
pam = tab[j, i];
if (spojnosc == Spojnosc.kwadrat)
{
if (pam <= tab[j + 1, i])
{
pam = tab[j + 1, i];
}
if (pam <= tab[j + 1, i + 1])
{
pam = tab[j + 1, i + 1];
}
if (pam <= tab[j, i + 1])
{
pam = tab[j, i + 1];
}
if (pam <= tab[j - 1, i + 1])
{
pam = tab[j - 1, i + 1];
}
if (pam <= tab[j - 1, i])
{
pam = tab[j - 1, i];
}
if (pam <= tab[j - 1, i - 1])
{
pam = tab[j - 1, i - 1];
}
if (pam <= tab[j, i - 1])
{
pam = tab[j, i - 1];
}
if (pam <= tab[j + 1, i - 1])
{
pam = tab[j + 1, i - 1];
}
}
else if (spojnosc == Spojnosc.romb)
{
if (pam <= tab[j + 1, i])
{
pam = tab[j + 1, i];
}
if (pam <= tab[j, i + 1])
{
pam = tab[j, i + 1];
}
if (pam <= tab[j - 1, i])
{
pam = tab[j - 1, i];
}
if (pam <= tab[j, i - 1])
{
pam = tab[j, i - 1];
}
}
dilate[j, i] = pam;
}
}
for (i = 0; i < bmp.Height; i++)
{
for (j = 0; j < bmp.Width; j++)
{
byte color = (byte)dilate[j, i];
bmp[j, i] = Color.FromArgb(255, color, color, color);
}
}
return(bmp);
}
public static void EqualizeHistogram(FastBitmap bmp, Histogram hist, EqualizeMethod method)
{
int R = 0;
double hInt = 0.0;
double[] left = new double[256];
double[] right = new double[256];
int[] newValue = new int[256];
for (int i = 0; i < 256; ++i)
{
left[i] = R;
hInt += hist.HistogramTable[i];
while (hInt > hist.Average)
{
hInt -= hist.Average;
if (R < 255)
{
R++;
}
}
right[i] = R;
switch (method)
{
case EqualizeMethod.Averages:
newValue[i] = (int)((left[i] + right[i]) / 2.0);
break;
case EqualizeMethod.Random:
newValue[i] = (int)(right[i] - left[i]);
break;
case EqualizeMethod.Own:
newValue[i] = (int)((left[i] + right[i]) / 2.0);
break;
}
}
for (int i = 0; i < bmp.Size.Width; ++i)
{
for (int j = 0; j < bmp.Size.Height; ++j)
{
Color color = bmp[i, j];
if (left[color.R] == right[color.R])
{
bmp[i, j] = Color.FromArgb(color.A, (int)left[color.R], (int)left[color.R], (int)left[color.R]);
}
else
{
switch (method)
{
case EqualizeMethod.Averages:
bmp[i, j] = Color.FromArgb(color.A, (int)newValue[color.R], (int)newValue[color.R], (int)newValue[color.R]);
break;
case EqualizeMethod.Random:
Random rnd = new Random();
int value = (int)left[color.R] + rnd.Next(newValue[color.R] + 1);
bmp[i, j] = Color.FromArgb(color.A, value, value, value);
break;
case EqualizeMethod.Neighborhood8:
double average = 0;
int count = 0;
foreach (Point offset in new Point[] { new Point(1, 0), new Point(-1, 0), new Point(0, 1), new Point(0, -1), new Point(1, 1), new Point(-1, -1), new Point(-1, 1), new Point(1, -1) })
{
if (i + offset.X >= 0 && i + offset.X < bmp.Width && j + offset.Y >= 0 && j + offset.Y < bmp.Height)
{
average += bmp[i + offset.X, j + offset.Y].R;
++count;
}
}
average /= count;
if (average > right[color.R])
{
bmp[i, j] = Color.FromArgb(color.A, (int)right[color.R], (int)right[color.R], (int)right[color.R]);
}
else if (average < left[color.R])
{
bmp[i, j] = Color.FromArgb(color.A, (int)left[color.R], (int)left[color.R], (int)left[color.R]);
}
else
{
bmp[i, j] = Color.FromArgb(color.A, (int)average, (int)average, (int)average);
}
break;
case EqualizeMethod.Own:
bmp[i, j] = Color.FromArgb(color.A, (int)newValue[color.R], (int)newValue[color.R], (int)newValue[color.R]);
break;
}
}
}
}
}
public static void Thinning(FastBitmap bmp)
{
int[] dx = { 0, 1, 1, 1, 0, -1, -1, -1 };
int[] dy = { 1, 1, 0, -1, -1, -1, 0, 1 };
bool[,] img = new bool[bmp.Width, bmp.Height];
int W = bmp.Width;
int H = bmp.Height;
for (int i = 0; i < bmp.Width; ++i)
{
for (int j = 0; j < bmp.Height; ++j)
{
img[i, j] = bmp[i, j].B < 128;
}
}
bool pass = false;
LinkedList <Point> list;
do
{
pass = !pass;
list = new LinkedList <Point>();
for (int x = 1; x < W - 1; ++x)
{
for (int y = 1; y < H - 1; ++y)
{
if (img[x, y])
{
int cnt = 0;
int hm = 0;
bool prev = img[x - 1, y + 1];
for (int i = 0; i < 8; ++i)
{
bool cur = img[x + dx[i], y + dy[i]];
hm += cur ? 1 : 0;
if (prev && !cur)
{
++cnt;
}
prev = cur;
}
if (hm > 1 && hm < 7 && cnt == 1)
{
if (pass && (!img[x + 1, y] || !img[x, y + 1] || !img[x, y - 1] && !img[x - 1, y]))
{
list.AddLast(new Point(x, y));
}
if (!pass && (!img[x - 1, y] || !img[x, y - 1] || !img[x, y + 1] && !img[x + 1, y]))
{
list.AddLast(new Point(x, y));
}
}
}
}
}
foreach (Point p in list)
{
img[p.X, p.Y] = false;
}
} while (list.Count != 0);
for (int x = 0; x < W; ++x)
{
for (int y = 0; y < H; ++y)
{
bmp[x, y] = img[x, y] ? Color.Black : Color.White;
}
}
}
public static FastBitmap Turtle(FastBitmap bitmap)
{
FastBitmap bmp = new FastBitmap((Bitmap)(bitmap.Bitmap.Clone()));
int[,] rtab = new int[bmp.Width, bmp.Height];
int[,] gtab = new int[bmp.Width, bmp.Height];
int[,] btab = new int[bmp.Width, bmp.Height];
int i, j;
for (i = 1; i < bmp.Width - 1; i++)
{
for (j = 1; j < bmp.Height - 1; j++)
{
rtab[i, j] = bmp[i, j].R;
gtab[i, j] = bmp[i, j].G;
btab[i, j] = bmp[i, j].B;
}
}
int d = 0;
int pami = 0, pamj = 0, ja = 0, ia = 0;
int x, y;
int[] wynik = new int[bmp.Width * bmp.Height];
int[] droga = new int[bmp.Width * bmp.Height];
for (i = 1; i < bmp.Height - 1; i++)
{
for (j = 1; j < bmp.Width - 1; j++)
{
if (rtab[j, i] != 0 || gtab[j, i] != 0 || btab[j, i] != 0)
{
ja = j;
ia = i;
pamj = j;
pami = i;
wynik[bmp.Width * i + j] = 255;
goto cont;
}
}
}
cont:
j = pamj;
i = pami - 1;
wynik[bmp.Width * i + j] = 255;
droga[d] = 1;
do
{
x = j - pamj;
y = i - pami;
pamj = j;
pami = i;
d++;
if (rtab[j, i] != 0 || gtab[j, i] != 0 || btab[j, i] != 0)
{
if (x == 0 && y == (-1))
{
j--;
droga[d] = 2;
}
if (x == 1 && y == 0)
{
i--;
droga[d] = 1;
}
if (x == 0 && y == 1)
{
j++;
droga[d] = 0;
}
if (x == (-1) && y == 0)
{
i++;
droga[d] = 3;
}
}
else
{
if (x == 0 && y == (-1))
{
j++;
droga[d] = 0;
}
if (x == 1 && y == 0)
{
i++;
droga[d] = 3;
}
if (x == 0 && y == 1)
{
j--;
droga[d] = 2;
}
if (x == (-1) && y == 0)
{
i--;
droga[d] = 1;
}
}
wynik[bmp.Width * i + j] = 255;
}while (j != ja || i != ia);
for (i = 0; i < bmp.Height; i++)
{
for (j = 0; j < bmp.Width; j++)
{
if (wynik[bmp.Width * i + j] == 255)
{
rtab[j, i] = 255;
gtab[j, i] = 0;
btab[j, i] = 0;
}
}
}
for (i = 0; i < bmp.Width; i++)
{
for (j = 0; j < bmp.Height; j++)
{
bmp[i, j] = Color.FromArgb(rtab[i, j], gtab[i, j], btab[i, j]);
}
}
return(bmp);
}
public static FastBitmap Operation(FastBitmap bmp1, FastBitmap bmp2, Operations op)
{
FastBitmap bmp = new FastBitmap(Math.Max(bmp1.Width, bmp2.Width), Math.Max(bmp1.Height, bmp2.Height));
for (int i = 0; i < bmp.Size.Width; ++i)
{
for (int j = 0; j < bmp.Size.Height; ++j)
{
Color c1;
Color c2;
if (isPixelValid(i, j, bmp1.Width, bmp1.Height))
{
c1 = bmp1[i, j];
}
else
{
c1 = Color.Black;
}
if (isPixelValid(i, j, bmp2.Width, bmp2.Height))
{
c2 = bmp2[i, j];
}
else
{
c2 = Color.Black;
}
switch (op)
{
case Operations.Add:
bmp[i, j] = Color.FromArgb(255, Math.Min(255, c1.R + c2.R), Math.Min(255, c1.G + c2.G), Math.Min(255, c1.B + c2.B));
break;
case Operations.Subtract:
bmp[i, j] = Color.FromArgb(255, Math.Max(0, c1.R - c2.R), Math.Max(0, c1.G - c2.G), Math.Max(0, c1.B - c2.B));
break;
case Operations.Multiply:
bmp[i, j] = Color.FromArgb(255, Math.Min(255, c1.R * c2.R), Math.Min(255, c1.G * c2.G), Math.Min(255, c1.B * c2.B));
break;
case Operations.Divide:
bmp[i, j] = Color.FromArgb(255, c1.R / Math.Max((byte)1, c2.R), c1.G / Math.Max((byte)1, c2.G), c1.B / Math.Max((byte)1, c2.B));
break;
case Operations.Difference:
bmp[i, j] = Color.FromArgb(255, Math.Abs(c1.R - c2.R), Math.Abs(c1.G - c2.G), Math.Abs(c1.B - c2.B));
break;
case Operations.AND:
bmp[i, j] = Color.FromArgb(255, Math.Max(0, Math.Min(255, c1.R & c2.R)), Math.Max(0, Math.Min(255, c1.G & c2.G)), Math.Max(0, Math.Min(255, c1.B & c2.B)));
break;
case Operations.OR:
bmp[i, j] = Color.FromArgb(255, Math.Max(0, Math.Min(255, c1.R | c2.R)), Math.Max(0, Math.Min(255, c1.G | c2.G)), Math.Max(0, Math.Min(255, c1.B | c2.B)));
break;
case Operations.XOR:
bmp[i, j] = Color.FromArgb(255, Math.Max(0, Math.Min(255, c1.R ^ c2.R)), Math.Max(0, Math.Min(255, c1.G ^ c2.G)), Math.Max(0, Math.Min(255, c1.B ^ c2.B)));
break;
}
}
}
return(bmp);
}
private void compressREADToolStripMenuItem_Click(object sender, EventArgs e)
{
FastBitmap bmp = ((ImageForm)ActiveMdiChild).Image;
const int PIXELLEN = 1; //4 bajty - 32 bity
const int WORDLEN = 1; //4 bajty - 32 bity
int newColor = 255, lastColor = 0;
int repeatCount = 0;
int total = 0;
int width = bmp.Width;
int height = bmp.Height;
int fld = width * height;
int before, after;
before = fld * PIXELLEN;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
Color color = bmp[x, y];
newColor = (color.R + color.G + color.B) / 3;
if (newColor == lastColor)
{
repeatCount++;
}
else
{
if (repeatCount > 0)
{
total += WORDLEN + PIXELLEN;
repeatCount = 0;
}
total += WORDLEN + PIXELLEN;
}
color = bmp[x, y];
lastColor = (color.R + color.G + color.B) / 3;
}
}
if (repeatCount > 0)
{
total += WORDLEN + PIXELLEN;
repeatCount = 0;
}
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
Color color = bmp[x, y];
newColor = (color.R + color.G + color.B) / 3;
if (newColor == lastColor)
{
repeatCount++;
}
else
{
if (repeatCount > 0)
{
total += WORDLEN + PIXELLEN;
repeatCount = 0;
}
total += WORDLEN + PIXELLEN;
}
color = bmp[x, y];
lastColor = (color.R + color.G + color.B) / 3;
}
}
if (repeatCount > 0)
{
total += WORDLEN + PIXELLEN;
repeatCount = 0;
}
after = total / 2;
MessageBox.Show("Original size: " + before + "\nNew size: " + after + "\nCompression level: " + (float)before / after, "Compression results");
}
private void compressBlockToolStripMenuItem_Click(object sender, EventArgs e)
{
FastBitmap bitmap = ((ImageForm)ActiveMdiChild).Image;
valueForm = new ValueForm(1, 100, "Enter the block size");
if (valueForm.ShowDialog() == DialogResult.OK)
{
int size = valueForm.Value;
int color = 0;
float avg;
float avgUP;
float avgDOWN;
int countUP;
int countDOWN;
int countAVG;
int sizeAfter = 0;
for (int y = 0; y < bitmap.Size.Height; y += size)
{
for (int x = 0; x < bitmap.Size.Width; x += size)
{
avg = 0;
countAVG = 0;
for (int yy = 0; yy < size; ++yy)
{
for (int xx = 0; xx < size; ++xx)
{
if (x + xx < bitmap.Size.Width && y + yy < bitmap.Size.Height)
{
color = bitmap[x + xx, y + yy].R;
avg += color;
++countAVG;
}
}
}
avg /= countAVG;
avg = (int)avg;
avgUP = 0;
avgDOWN = 0;
countDOWN = 0;
countUP = 0;
for (int yy = 0; yy < size; ++yy)
{
for (int xx = 0; xx < size; ++xx)
{
if (x + xx < bitmap.Size.Width && y + yy < bitmap.Size.Height)
{
color = bitmap[x + xx, y + yy].R;
if (color >= avg)
{
avgUP += color; ++countUP;
}
else
{
avgDOWN += color; ++countDOWN;
}
}
}
}
avgUP /= countUP;
avgDOWN /= countDOWN;
avgUP = (int)avgUP;
avgDOWN = (int)avgDOWN;
for (int yy = 0; yy < size; ++yy)
{
for (int xx = 0; xx < size; ++xx)
{
if (x + xx < bitmap.Size.Width && y + yy < bitmap.Size.Height)
{
color = bitmap[x + xx, y + yy].R;
if (color >= avg)
{
bitmap[x + xx, y + yy] = Color.FromArgb(255, (int)avgUP, (int)avgUP, (int)avgUP);
}
else
{
bitmap[x + xx, y + yy] = Color.FromArgb(255, (int)avgDOWN, (int)avgDOWN, (int)avgDOWN);
}
}
}
}
sizeAfter += size * size + 16;
}
}
int sizeBefore = bitmap.Size.Width * bitmap.Size.Height * 8;
((ImageForm)ActiveMdiChild).Refresh();
((ImageForm)ActiveMdiChild).Changed = true;
MessageBox.Show("Original size: " + sizeBefore + "\nNew size: " + sizeAfter + "\nCompression level: " + (float)sizeBefore / (float)sizeAfter, "Compression results");
}
}
private void compressRLEToolStripMenuItem_Click(object sender, EventArgs e)
{
FastBitmap bitmap = ((ImageForm)ActiveMdiChild).Image;
int oSize = ((ImageForm)ActiveMdiChild).Image.Width * ((ImageForm)ActiveMdiChild).Image.Height * 24 / 8;
int nSize = oSize * 2;
int licznik = 0;
int przed;
int po = 0;
float stopien;
int pam;
int pam2 = -128;
przed = bitmap.Width * bitmap.Height;
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
if (y >= bitmap.Height)
{
break;
}
pam = (int)((0.3 * (float)bitmap[x, y].R) +
(0.59 * (float)bitmap[x, y].G) +
(0.11 * (float)bitmap[x, y].B));
if (pam == pam2)
{
licznik = 0;
while (((pam = (int)((0.3 * (float)bitmap[x, y].R) +
(0.59 * (float)bitmap[x, y].G) +
(0.11 * (float)bitmap[x, y].B))) == pam2) && (licznik < 127))
{
licznik++;
x++;
if (x >= bitmap.Width - 1)
{
x = 0;
y++;
if (y >= bitmap.Height)
{
break;
}
}
pam2 = pam;
}
po += 2;
}
else
{
licznik = 0;
while (((pam = (int)((0.3 * (float)bitmap[x, y].R) +
(0.59 * (float)bitmap[x, y].G) +
(0.11 * (float)bitmap[x, y].B))) != pam2) && (licznik < 127))
{
licznik++;
x++;
if (x >= bitmap.Width - 1)
{
x = 0;
y++;
if (y >= bitmap.Height)
{
break;
}
}
pam2 = pam;
}
po = po + licznik + 1;
}
pam2 = pam;
}
}
stopien = (float)przed / (float)po;
oSize = przed;
nSize = po;
MessageBox.Show("Original size: " + oSize + "\nNew size: " + nSize + "\nCompression level: " + (float)oSize / nSize, "Compression results");
}