private Bitmap localProcessingFilter(Bitmap originalBitmap, int windowSize, double coef)
{
Bitmap newBitmap = new Bitmap(originalBitmap.Width, originalBitmap.Height);
LockBitmap original = new LockBitmap(originalBitmap);
LockBitmap filtered = new LockBitmap(newBitmap);
int width = originalBitmap.Width;
int height = originalBitmap.Height;
original.LockBits();
filtered.LockBits();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
Color pixel = original.GetPixel(x, y);
int[] result = new int[3] {
pixel.R, pixel.G, pixel.B
};
Square indexes = GetSquare(x, y, windowSize, height, width);
double[] average = GetLocalAverage(original, indexes);
double[] square = GetLocalSquare(original, indexes);
for (int i = 0; i < 3; i++)
{
int limit = (int)(average[i] + coef * square[i] + 0.5);
if (result[i] >= limit)
{
result[i] = 0;
}
else
{
result[i] = 255;
}
}
filtered.SetPixel(x, y, Color.FromArgb(result[0], result[1], result[2]));
}
}
filtered.UnlockBits();
original.UnlockBits();
return(newBitmap);
}
private Bitmap adaptiveProcessingFilter(Bitmap originalBitmap, double coef)
{
Bitmap newBitmap = new Bitmap(originalBitmap.Width, originalBitmap.Height);
LockBitmap original = new LockBitmap(originalBitmap);
LockBitmap filtered = new LockBitmap(newBitmap);
int width = originalBitmap.Width;
int height = originalBitmap.Height;
original.LockBits();
filtered.LockBits();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
Color pixel = original.GetPixel(x, y);
int[] result = new int[3] {
pixel.R, pixel.G, pixel.B
};
int[] limits = GetAdaptiveLimits(original, x, y);
for (int i = 0; i < 3; i++)
{
if (result[i] > limits[i])
{
result[i] = 255;
}
else
{
result[i] = 0;
}
}
filtered.SetPixel(x, y, Color.FromArgb(result[0], result[1], result[2]));
}
}
filtered.UnlockBits();
original.UnlockBits();
return(newBitmap);
}
private Bitmap highFrequenceFilter(Bitmap originalBitmap, ImageFilter filter)
{
Bitmap newBitmap = new Bitmap(originalBitmap.Width, originalBitmap.Height);
LockBitmap original = new LockBitmap(originalBitmap);
LockBitmap filtered = new LockBitmap(newBitmap);
int width = originalBitmap.Width;
int height = originalBitmap.Height;
original.LockBits();
filtered.LockBits();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int[] result = new int[3];
if (y > 0 && x > 0)
{
SumArrays(result, GetPixelWithMultiply(original, x - 1, y - 1, filter.Matrix[0, 0]));
}
if (y > 0)
{
SumArrays(result, GetPixelWithMultiply(original, x, y - 1, filter.Matrix[0, 1]));
}
if (y > 0 && x < width - 1)
{
SumArrays(result, GetPixelWithMultiply(original, x + 1, y - 1, filter.Matrix[0, 2]));
}
if (x > 0)
{
SumArrays(result, GetPixelWithMultiply(original, x - 1, y, filter.Matrix[1, 0]));
}
SumArrays(result, GetPixelWithMultiply(original, x, y, filter.Matrix[1, 1]));
if (x < width - 1)
{
SumArrays(result, GetPixelWithMultiply(original, x + 1, y, filter.Matrix[1, 2]));
}
if (y < height - 1 && x > 0)
{
SumArrays(result, GetPixelWithMultiply(original, x - 1, y + 1, filter.Matrix[2, 0]));
}
if (y < height - 1)
{
SumArrays(result, GetPixelWithMultiply(original, x, y + 1, filter.Matrix[2, 1]));
}
if (y < height - 1 && x < width - 1)
{
SumArrays(result, GetPixelWithMultiply(original, x + 1, y + 1, filter.Matrix[2, 2]));
}
for (int i = 0; i < 3; i++)
{
if (result[i] < 0)
{
result[i] = 0;
}
if (result[i] > 255)
{
result[i] = 255;
}
}
filtered.SetPixel(x, y, Color.FromArgb(result[0], result[1], result[2]));
}
}
filtered.UnlockBits();
original.UnlockBits();
return(newBitmap);
}
