How to extract barcode and finger print image using Aforge

Hi This is the first time I use Aforge, a beginner with this lib...
I have to extract a barcode image and fingerprint from a lot of documents, and those imagens will be save it into a database, the problem is How crop the image of the finger print and barcode (pdf417) from the image using Aforge,
I just found this on stackoverflow
And Aforge Forum I´ve found http://www.aforgenet.com/forum/viewtopic.php?f=4&t=2179 4 steps to auto crop
but not found how to recognize barcode (pdf417) and fingerprint
I have to extract a barcode image and fingerprint from a lot of documents, and those imagens will be save it into a database, the problem is How crop the image of the finger print and barcode (pdf417) from the image using Aforge,
I just found this on stackoverflow
- Code: Select all
public static System.Drawing.Image AforgeAutoCrop(Bitmap selectedImage)
{
Bitmap autoCropImage = null;
try
{
autoCropImage = selectedImage;
// create grayscale filter (BT709)
Grayscale filter = new Grayscale(0.2125, 0.7154, 0.0721);
Bitmap grayImage = filter.Apply(autoCropImage);
// create instance of skew checker
DocumentSkewChecker skewChecker = new DocumentSkewChecker();
// get documents skew angle
double angle = skewChecker.GetSkewAngle(grayImage);
// create rotation filter
RotateBilinear rotationFilter = new RotateBilinear(-angle);
rotationFilter.FillColor = Color.White;
// rotate image applying the filter
Bitmap rotatedImage = rotationFilter.Apply(grayImage);
new ContrastStretch().ApplyInPlace(rotatedImage);
new Threshold(100).ApplyInPlace(rotatedImage);
BlobCounter bc = new BlobCounter();
bc.FilterBlobs = true;
// bc.MinWidth = 500;
//bc.MinHeight = 500;
bc.ProcessImage(rotatedImage);
Rectangle[] rects = bc.GetObjectsRectangles();
if (rects.Length == 0)
{
System.Windows.Forms.MessageBox.Show("No rectangle found in image ");
}
else if (rects.Length == 1)
{
autoCropImage = rotatedImage.Clone(rects[0], rotatedImage.PixelFormat); ;
}
else if (rects.Length > 1)
{
// get largets rect
Console.WriteLine("Using largest rectangle found in image ");
var r2 = rects.OrderByDescending(r => r.Height * r.Width).ToList();
autoCropImage = rotatedImage.Clone(r2[1], rotatedImage.PixelFormat);
}
else
{
Console.WriteLine("Huh? on image ");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return autoCropImage;
}
And Aforge Forum I´ve found http://www.aforgenet.com/forum/viewtopic.php?f=4&t=2179 4 steps to auto crop
but not found how to recognize barcode (pdf417) and fingerprint