public Bitmap PgmToBitmap(PgmImage pgmImage)
{
if (pgmImage != null && pgmImage.MagicNumber == "P2")
{
int width = pgmImage.Width;
int height = pgmImage.Height;
Bitmap result = new Bitmap(width, height);
Graphics gr = Graphics.FromImage(result);
int pixel = 0;
for (int i = 0; i < pgmImage.Height; ++i)
{
for (int j = 0; j < pgmImage.Width; ++j)
{
int pixelColor = pgmImage.Data[pixel++];
Color c = Color.FromArgb(pixelColor, pixelColor, pixelColor);
SolidBrush sb = new SolidBrush(c);
gr.FillRectangle(sb, j, i, 1, 1);
}
}
return(result);
}
return(null);
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
DialogResult dlgResult = openFileDialog1.ShowDialog();
if (dlgResult == DialogResult.OK)
{
try {
pgmOriginalImage = new PgmImage(openFileDialog1.FileName);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
pictureBoxOriginalImage.Image = PgmToBitmap(pgmOriginalImage);
if (pictureBoxOriginalImage.Image != null)
{
inputFileName = openFileDialog1.FileName;
trackBarThreshold.Maximum = pgmOriginalImage.MaxVal;
trackBarThreshold.Value = trackBarThreshold.Minimum;
trackBarThreshold.Enabled = true;
outputFileName = null;
pictureBoxResultImage.Visible = true;
pictureBoxResultImage.Image = null;
labelMagicNumber.Text = "Magic Number: " + pgmOriginalImage.MagicNumber;
labelWidth.Text = "Width: " + pgmOriginalImage.Width + " px";
labelHieght.Text = "Height: " + pgmOriginalImage.Height + " px";
labelMaxVal.Text = "Maximum Gray Value: " + pgmOriginalImage.MaxVal;
}
else
{
inputFileName = null;
outputFileName = null;
pictureBoxResultImage.Visible = false;
pictureBoxOriginalImage.Image = pictureBoxOriginalImage.ErrorImage;
trackBarThreshold.Value = trackBarThreshold.Minimum;
trackBarThreshold.Enabled = false;
labelMagicNumber.Text = "Magic Number:";
labelWidth.Text = "Width:";
labelHieght.Text = "Height:";
labelMaxVal.Text = "Maximum Gray Value:";
labelThreshold.Text = "Threshold:";
}
}
}
public PgmImage BitmapToPgm(Bitmap monoBmpImage, string magicNumber)
{
if (monoBmpImage != null)
{
PgmImage result = new PgmImage(monoBmpImage.Width, monoBmpImage.Height, magicNumber, null, 255);
int pixel = 0;
for (int i = 0; i < monoBmpImage.Height; ++i)
{
for (int j = 0; j < monoBmpImage.Width; ++j)
{
// the image is monochromatic
result.Data[pixel++] = monoBmpImage.GetPixel(j, i).R;
}
}
return(result);
}
return(null);
}