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;
tableLayoutPanelEffect.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;
tableLayoutPanelEffect.Enabled = false;
labelMagicNumber.Text = "Magic Number:";
labelWidth.Text = "Width:";
labelHieght.Text = "Height:";
labelMaxVal.Text = "Maximum Gray Value:";
labelThreshold.Text = "Threshold:";
}
}
}
public PgmImage Negative(PgmImage img, ImagePart imgPart)
{
if (img != null)
{
PgmImage result = new PgmImage(img.Width, img.Height, img.MagicNumber, null, img.MaxVal);
Array.Copy(img.Data, result.Data, img.Data.Length);
switch (imgPart)
{
case ImagePart.Full:
for (int i = 0; i < img.Data.Length; i++)
{
result.Data[i] = (byte)(maxValue - result.Data[i]);
}
break;
case ImagePart.Right:
for (int i = img.Width / 2; i < img.Data.Length; i += img.Width)
{
int innerLen = (img.Width / 2) + i;
for (int j = i; j < innerLen; j++)
{
result.Data[j] = (byte)(maxValue - result.Data[j]);
}
}
break;
case ImagePart.Left:
for (int i = 0; i < img.Data.Length; i += img.Width)
{
int innerLen = (img.Width / 2) + i;
for (int j = i; j < innerLen; j++)
{
result.Data[j] = (byte)(maxValue - result.Data[j]);
}
}
break;
}
return(result);
}
return(null);
}
