public void FastCrop(int xc, int yc, int w, int h, ref FastColorImage result)
{
int x0, y0;
/* adjust region to fit in source image */
x0 = xc - w / 2;
y0 = yc - h / 2;
if (x0 < 0)
{
w += x0;
x0 = 0;
}
if (x0 > this.Width)
{
x0 = this.Width;
}
if (y0 < 0)
{
h += y0;
y0 = 0;
}
if (y0 > this.Height)
{
y0 = this.Height;
}
if (x0 + w > this.Width)
{
w = this.Width - x0;
}
if (y0 + h > this.Height)
{
h = this.Height - y0;
}
result.Width = w;
result.Height = h;
result.xOffset = x0;
result.yOffset = y0;
result.originalWidth = this.Width;
result.singledata = this.singledata;
}
public ColorImage GenerateStrokeArea(Bitmap input, int s)
{
FastColorImage piece = new FastColorImage();
double m;
ArrayList list = new ArrayList();
double pixVal;
DateTime start = DateTime.Now;
//Bitmap img = new Bitmap(input.Width, input.Height);
ColorImage cImg = new ColorImage(input.Width, input.Height);
StreamWriter writer = null; //new StreamWriter("new.txt");
FastColorImage inMem = new FastColorImage(new UnsafeBitmap(input));
for (int i = 0; i < input.Height; i++)
{
for (int j = 0; j < input.Width; j++)
{
inMem.FastCrop(j, i, s, s, ref piece);
System.Drawing.Color topColor = inMem.GetColor(j, i);
m = Moment00(piece, topColor, writer);
pixVal = (255.0 * m / (piece.Width * piece.Height));
cImg.SetColor(j, i, Color.FromArgb((int)pixVal, (int)pixVal, (int)pixVal));
}
}
//img.Save("area.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
TimeSpan duration = DateTime.Now - start;
System.Console.WriteLine("Stroke area computed in " + duration.TotalMilliseconds + "ms");
return(cImg);
}