private void posterizationToolStripMenuItem_Click(object sender, EventArgs e)
{
valueForm = new ValueForm(0, 255, "Liczba poziomów szarości:");
if (valueForm.ShowDialog() == DialogResult.OK)
{
ImageHelper.Posterize(((ImageForm)ActiveMdiChild).Image, valueForm.Value);
((ImageForm)ActiveMdiChild).Refresh();
((ImageForm)ActiveMdiChild).Changed = true;
}
}
private void gammaToolStripMenuItem_Click(object sender, EventArgs e)
{
valueForm = new ValueForm(1, 20, "Podaj wartość:");
if (valueForm.ShowDialog() == DialogResult.OK)
{
ImageHelper.GammaCorrect(((ImageForm)ActiveMdiChild).Image, valueForm.Value);
((ImageForm)ActiveMdiChild).Refresh();
((ImageForm)ActiveMdiChild).Changed = true;
}
}
private void rozciaganieToolStripMenuItem_Click(object sender, EventArgs e)
{
valueForm = new ValueForm(0, 255, "Podaj dolną wartość:");
if (valueForm.ShowDialog() == DialogResult.OK)
{
int low = valueForm.Value;
valueForm = new ValueForm(0, 255, "Podaj górną wartość:");
if (valueForm.ShowDialog() == DialogResult.OK)
{
ImageHelper.Rozciagnij(((ImageForm)ActiveMdiChild).Image, low, valueForm.Value);
((ImageForm)ActiveMdiChild).Refresh();
((ImageForm)ActiveMdiChild).Changed = true;
}
}
}
private void medianFilteringToolStripMenuItem_Click(object sender, EventArgs e)
{
FastBitmap bmp = ((ImageForm)ActiveMdiChild).Image;
valueForm = new ValueForm(3, 21, "Podaj rozmiar macierzy:", false, true);
if (valueForm.ShowDialog() == DialogResult.OK)
{
int filterSize = valueForm.Value;
for (int i = 0; i < bmp.Size.Width; ++i)
{
for (int j = 0; j < bmp.Size.Height; ++j)
{
byte[] neighbours = new byte[filterSize * filterSize];
int a = 0;
for (int k = -filterSize / 2; k <= filterSize / 2; ++k)
{
for (int l = -filterSize / 2; l <= filterSize / 2; ++l)
{
neighbours[a++] = bmp[i + k, j + l].R;
}
}
Color color = bmp[i, j];
byte newColor;
Array.Sort(neighbours);
if (neighbours.Length % 2 == 1)
{
newColor = neighbours[neighbours.Length / 2];
}
else
{
newColor = (byte)((neighbours[neighbours.Length / 2] + neighbours[(neighbours.Length / 2) + 1]) / 2);
}
bmp[i, j] = Color.FromArgb(color.A, newColor, newColor, newColor);
}
}
((ImageForm)ActiveMdiChild).Refresh();
((ImageForm)ActiveMdiChild).Changed = true;
}
}
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;
}
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");
}
}
