public static Bitmap BoundCore(Bitmap b)
{
// GDI+ still lies to us - the return format is BGR, NOT RGB.
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
int stride = bmData.Stride;
System.IntPtr Scan0 = bmData.Scan0;
int rw, rn, re, rs;
rw = rn = re = rs = -1;
unsafe
{
byte *p = (byte *)(void *)Scan0;
int nOffset = stride - b.Width * 3;
byte red, green, blue;
for (int y = 0; y < b.Height; ++y)
{
for (int x = 0; x < b.Width; ++x)
{
blue = p[0];
green = p[1];
red = p[2];
if (blue == 255 && green == 255 && red == 255)
{
if (rw == -1)
{
rw = x;
}
rw = Math.Min(rw, x);
if (re == -1)
{
re = x;
}
re = Math.Max(re, x);
if (rn == -1)
{
rn = y;
}
rn = Math.Min(rn, y);
if (rs == -1)
{
rs = y;
}
rs = Math.Max(rs, y);
}
p += 3;
}
p += nOffset;
}
}
b.UnlockBits(bmData);
int d = Math.Max(re + 1 - rw, rs + 1 - rn);
return(FontMethods.CropBitmap(b, new Rectangle(rw, rn, d, d)));
}
public static Bitmap[] ImageToTextR1(Bitmap b)
{
// GDI+ still lies to us - the return format is BGR, NOT RGB.
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
int stride = bmData.Stride;
System.IntPtr Scan0 = bmData.Scan0;
List <Rectangle> brow = new List <Rectangle>();
unsafe
{
byte *p = (byte *)(void *)Scan0;
int nOffset = stride - b.Width * 3;
byte red, green, blue;
int rx, ry, rw, rh;
rx = ry = rw = rh = 0;
bool fs = false;
int[] fr = new int[b.Height];
for (int y = 0; y < b.Height; ++y)
{
for (int x = 0; x < b.Width; ++x)
{
blue = p[0];
green = p[1];
red = p[2];
if (blue == 0 && green == 0 && red == 0)
{
fr[y]++;
}
p += 3;
}
p += nOffset;
}
for (int y = 0; y < b.Height; ++y)
{
//first possition has byte -> start row
if ((!fs) && fr[y] < b.Width)
{
rx = 0;
ry = y;
rw = b.Width;
fs = true;
}
else
{
//fisrt possition no byte after has byte -> end row
if (fs && ((fr[y] == b.Width) || (y + 1 == b.Height)))
{
rh = y - ry + 1;
Rectangle bm = new Rectangle(rx, ry, rw, rh);
brow.Add(bm);
if (brow.Count > 1)
{
Rectangle f = brow[brow.Count - 1];
Rectangle l = brow[brow.Count - 2];
//minimum distance between row 4px
if (f.Y + 1 - l.Y - l.Height - 4 < 0)
{
Rectangle n = new Rectangle(l.X, l.Y, f.Width, l.Height + f.Y + 1 - l.Y);
brow.RemoveRange(brow.Count - 2, 2);
brow.Add(n);
}
}
rx = ry = rw = rh = 0;
fs = false;
}
}
}
}
b.UnlockBits(bmData);
Bitmap[] ar = FontMethods.CropBitmap(b, brow.ToArray());
return(ar);
}