private static void Transformation(MatColor im, MatColor output, Vector X)
{
for (int y = 0; y < output.h; ++y)
{
for (int x = 0; x < output.w; ++x)
{
PointD p1;
p1.x = (X[0] * x + X[1] * y + X[2]) /
(1 + X[3] * x + X[4] * y);
p1.y = (X[5] * x + X[6] * y + X[7] +
X[8] * x * x + X[9] * x * y) /
(1 + X[3] * x + X[4] * y);
byte valR, valG, valB;
im.ugetbilinear(p1.x, p1.y, out valR, out valG, out valB);
output.uset(x, y, valR, valG, valB);
}
}
}
public static void Do(Vector X)
{
string path = @"..\..\perspective.jpg";
Bitmap bmp0 = LoadBitmap(path);
Bitmap bmp1 = new Bitmap(bmp0.Width, (int)(bmp0.Height * 1.5));
Rectangle rect = new Rectangle(0, 0, bmp0.Width, bmp0.Height);
BitmapData data = bmp0.LockBits(rect, ImageLockMode.ReadWrite, bmp0.PixelFormat);
IntPtr ptr = data.Scan0;
int w = bmp0.Width;
int h = bmp0.Height;
int numBytes = data.Stride * bmp0.Height;
MatColor im = new MatColor(w, h);
Marshal.Copy(ptr, im.bytes, 0, numBytes);
bmp0.UnlockBits(data);
MatColor output = new MatColor(bmp1.Width, bmp1.Height);
Transformation(im, output, X);
rect = new Rectangle(0, 0, bmp1.Width, bmp1.Height);
data = bmp1.LockBits(rect, ImageLockMode.ReadWrite, bmp1.PixelFormat);
ptr = data.Scan0;
numBytes = data.Stride * bmp1.Height;
Marshal.Copy(output.bytes, 0, ptr, numBytes);
bmp1.UnlockBits(data);
ImageCodecInfo myImageCodecInfo;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;
myImageCodecInfo = GetEncoderInfo("image/jpeg");
Encoder myEncoder = Encoder.Quality;
myEncoderParameters = new EncoderParameters(1);
myEncoderParameter = new EncoderParameter(myEncoder, 87L);
myEncoderParameters.Param[0] = myEncoderParameter;
bmp1.Save(@"..\..\output.jpg", myImageCodecInfo, myEncoderParameters);
}