I Have Black And White Image. Each Image Have A Number From 0 To 9. Now I Have To Write A Code To Detect A Particular Number In C#.

Firstly help me in telling that i m getting cropped image from top left but not from bottom right ..suggest me



// Count the black and white pixels.
private void button2_Click(object sender, EventArgs e)
{
Bitmap bm = new Bitmap(pictureBox1.Image);
int black_pixels = CountPixels(bm, Color.FromArgb(255, 0, 0, 0));

lblBlack.Text = black_pixels + " black pixels";

lblTotal.Text = black_pixels + " total pixels";



}

// Return the number of matching pixels.
private int CountPixels(Bitmap bm, Color target_color)
{
// Figure out the final size
int minh = 1000;
int minw = 1000;
for (int y = 0; y < bm.Height; y++)

{
for (int x = 0; x < bm.Width; x++)
{
if (bm.GetPixel(x, y) == target_color)
{
if (x < minw)
minw = x;
if (y < minh)
minh = y;
}
}
}



// Loop through the pixels.
int matches = 0;
int tempi = 0;
int tempj = 0;
for (int y = 0; y < bm.Height; y++)
{
for (int x = 0; x < bm.Width; x++)
{
if (bm.GetPixel(x, y) == target_color)
{
if (x > tempi)
tempi = x;
if (y > tempj)
tempj = y;

}
}
}
matches = 0;

Bitmap bm1 = CropImage(bm, minw, minh, tempi, tempj);

pictureBox2.Image = new Bitmap (bm1);


for (int i = minh; i < tempi; i++)
{
for (int j = minw; j < tempj; j++)
{
if (bm1.GetPixel(i, j) == target_color) matches++;
}
}

return matches ;

}
public static Bitmap CropImage(Image source, int x, int y, int width, int height)
{
Rectangle crop = new Rectangle(x, y, width, height);

var bmp = new Bitmap(crop.Width, crop.Height);
using (var gr = Graphics.FromImage(bmp))
{
gr.DrawImage(source, new Rectangle(0, 0, bmp.Width, bmp.Height), crop, GraphicsUnit.Pixel);
}
return bmp;
}