public static Bitmap OffsetFilterAbs(Bitmap image, int xOffset, int yOffset)
{
LockBitmap lockImage = new LockBitmap(image);
lockImage.LockBits();
Bitmap result = new Bitmap(width: image.Width, height: image.Height);
LockBitmap lockResult = new LockBitmap(result);
lockResult.LockBits();
for (int y = 0; y < lockImage.Height; y++)
{
for (int x = 0; y < lockImage.Width; x++)
{
int newY = y + yOffset;
int newX = x + xOffset;
if (newY < lockImage.Height && newX < lockImage.Width)
{
Color cl = lockImage.GetPixel(x, y);
lockResult.SetPixel(newX, newY, cl);
}
}
}
lockImage.UnlockBits();
lockResult.UnlockBits();
return(result);
}
public static Bitmap GrayScale(Bitmap image)
{
LockBitmap lockImage = new LockBitmap(image);
lockImage.LockBits();
Bitmap result = (Bitmap)image.Clone();
LockBitmap lockResult = new LockBitmap(result);
lockResult.LockBits();
int nWidth = lockImage.Width;
int nHeight = lockImage.Height;
for (int y = 0; y < nHeight; y++)
{
for (int x = 0; x < nWidth; x++)
{
Color originalColor = lockImage.GetPixel(x, y);
int red = originalColor.R;
int green = originalColor.G;
int blue = originalColor.B;
int avg = (red + green + blue) / 3;
Color newColor = Color.FromArgb(red: avg, blue: avg, green: avg);
lockResult.SetPixel(x, y, newColor);
}
}
lockImage.UnlockBits();
lockResult.UnlockBits();
return(result);
}
public static Bitmap GrayWorld(Bitmap image)
{
LockBitmap lockImage = new LockBitmap(image);
lockImage.LockBits();
Bitmap result = (Bitmap)image.Clone();
LockBitmap lockResult = new LockBitmap(result);
lockResult.LockBits();
int nWidth = lockImage.Width;
int nHeight = lockImage.Height;
int redSum = 0, greenSum = 0, blueSum = 0;
for (int y = 0; y < nHeight; y++)
{
for (int x = 0; x < nWidth; x++)
{
Color color = lockImage.GetPixel(x, y);
redSum += color.R;
greenSum += color.G;
blueSum += color.B;
}
}
int size = nWidth * nHeight;
double redGlobal = 1f / size * redSum;
double greenGlobal = 1f / size * greenSum;
double blueGlobal = 1f / size * blueSum;
double avg = (redGlobal + greenGlobal + blueGlobal) / 3;
double redDiv = avg / redGlobal;
double greenDiv = avg / greenGlobal;
double blueDiv = avg / blueGlobal;
for (int y = 0; y < nHeight; y++)
{
for (int x = 0; x < nWidth; x++)
{
Color color = lockImage.GetPixel(x, y);
int newRed = (int)(color.R * redDiv);
int newGreen = (int)(color.G * greenDiv);
int newBlue = (int)(color.B * blueDiv);
lockResult.SetPixel(x, y, Color.FromArgb((newRed < 255) ? newRed: 254, (newGreen < 255) ? newGreen : 254, (newBlue < 255) ? newBlue : 254));
}
}
lockImage.UnlockBits();
lockResult.UnlockBits();
return(result);
}
//public static bool Swirl(Bitmap b, double fDegree, bool bSmoothing /* default fDegree to .05 */)
//{
// int nWidth = b.Width;
// int nHeight = b.Height;
// FloatPoint[,] fp = new FloatPoint[nWidth, nHeight];
// Point[,] pt = new Point[nWidth, nHeight];
// Point mid = new Point();
// mid.X = nWidth / 2;
// mid.Y = nHeight / 2;
// double theta, radius;
// double newX, newY;
// for (int x = 0; x < nWidth; ++x)
// for (int y = 0; y < nHeight; ++y)
// {
// int trueX = x - mid.X;
// int trueY = y - mid.Y;
// theta = Math.Atan2((trueY), (trueX));
// radius = Math.Sqrt(trueX * trueX + trueY * trueY);
// newX = mid.X + (radius * Math.Cos(theta + fDegree * radius));
// if (newX > 0 && newX < nWidth)
// {
// fp[x, y].X = newX;
// pt[x, y].X = (int)newX;
// }
// else
// fp[x, y].X = pt[x, y].X = x;
// newY = mid.Y + (radius * Math.Sin(theta + fDegree * radius));
// if (newY > 0 && newY < nHeight)
// {
// fp[x, y].Y = newY;
// pt[x, y].Y = (int)newY;
// }
// else
// fp[x, y].Y = pt[x, y].Y = y;
// }
//}
//if (bSmoothing)
// OffsetFilterAntiAlias(b, fp);
//else
// OffsetFilterAbs(b, pt);
public static Bitmap RandomJitter(Bitmap image, short nDegree)
{
LockBitmap lockImage = new LockBitmap(image);
lockImage.LockBits();
Bitmap result = (Bitmap)image.Clone();
LockBitmap lockResult = new LockBitmap(result);
lockResult.LockBits();
int nWidth = lockImage.Width;
int nHeight = lockImage.Height;
int newX, newY;
short nHalf = (short)Math.Floor(nDegree / 2.0);
Random rnd = new Random();
for (int x = 0; x < nWidth; x++)
{
for (int y = 0; y < nHeight; y++)
{
newX = rnd.Next(nDegree) - nHalf;
if (x + newX < 0 || x + newX >= nWidth)
{
newX = 0;
}
else
{
newX = newX + x;
}
newY = rnd.Next(nDegree) - nHalf;
if (y + newY < 0 || y + newY >= nHeight)
{
newY = 0;
}
else
{
newY = newY + y;
}
Color cl = lockImage.GetPixel(x, y);
lockResult.SetPixel(newX, newY, cl);
}
}
lockImage.UnlockBits();
lockResult.UnlockBits();
return(result);
}
static public Bitmap rotate(Bitmap image, int angle)
{
LockBitmap lockImage = new LockBitmap(image);
Bitmap result = new Bitmap(width: image.Width, height: image.Height);
LockBitmap lockResult = new LockBitmap(result);
lockImage.LockBits();
lockResult.LockBits();
// center of image
int y0 = image.Height / 2;
int x0 = image.Width / 2;
double degree = Math.PI * angle / 180.0;
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
int newX = Convert.ToInt32(Math.Cos(degree) * (x - x0) - Math.Sin(degree) * (y - y0) + x0);
if (newX >= image.Width || newX < 0)
{
continue;
}
int newY = Convert.ToInt32(Math.Sin(degree) * (x - x0) + Math.Cos(degree) * (y - y0) + y0);
if (newY >= image.Height || newY < 0)
{
continue;
}
Color color = lockImage.GetPixel(x, y);
lockResult.SetPixel(newX, newY, color);
}
}
lockImage.UnlockBits();
lockResult.UnlockBits();
return(result);
}
static public Bitmap wind(Bitmap image, int strength, Direction direction)
{
int pixelStrenght = strengthToPixels(strength, image, direction.orientation());
Random randShift = new Random(pixelStrenght);
Bitmap result = new Bitmap(width: image.Width, height: image.Height);
LockBitmap lockResult = new LockBitmap(result);
LockBitmap lockBitmap = new LockBitmap(image);
lockBitmap.LockBits();
lockResult.LockBits();
switch (direction)
{
case Direction.Left:
for (int y = lockBitmap.Height - 1; y >= 0; y--)
{
for (int x = 0; x < lockBitmap.Width; x++)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = x - randShift.Next(0, strength);
for (int i = shift; (i <= x && i >= 0); i++)
{
lockResult.SetPixel(i, y, cl);
}
}
}
break;
case Direction.Right:
for (int y = lockBitmap.Height - 1; y >= 0; y--)
{
for (int x = lockBitmap.Width - 1; x >= 0; x--)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = x + randShift.Next(0, strength);
for (int i = x; (i <= shift && i < lockBitmap.Width); i++)
{
lockResult.SetPixel(i, y, cl);
}
}
}
break;
case Direction.Down:
for (int x = 0; x < lockBitmap.Width; x++)
{
for (int y = lockBitmap.Height - 1; y >= 0; y--)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = y + randShift.Next(0, strength);
for (int i = y; (i <= shift && i < lockBitmap.Height); i++)
{
lockResult.SetPixel(x, i, cl);
}
}
}
break;
case Direction.Up:
for (int x = 0; x < lockBitmap.Width; x++)
{
for (int y = 0; y < lockBitmap.Height; y++)
{
Color cl = lockBitmap.GetPixel(x, y);
int shift = y - randShift.Next(0, strength);
for (int i = shift; (i <= y && i >= 0); i++)
{
lockResult.SetPixel(x, i, cl);
}
}
}
break;
}
lockBitmap.UnlockBits();
lockResult.UnlockBits();
return(result);
}