How to Read & Mark Barcode Regions in an Image inside .NET Applications
This Technical tip explains how to mark barcode regions in the Image inside .NET applications. In this section, we will read the image and mark all the barcode regions, for all the recognized barcodes in the image. The barcode region is the part of the image that only contains the barcode itself. In a large image, it is possible that there are other texts or images along with the barcode. Getting the barcode region will separate the barcodes from other text/objects in the image by marking their edges or by filling with some color. First, we will read the BarCodes in the image using the BarCodeReader.Read() method. Then, we will get the region of the barcode using BarCodeReader.GetRegion() method, which will return an instance of type BarCodeRegion. We can then draw edges around the barcode using BarCodeRegion.DrawBarCodeEdges() method.
//your code here...//[C# Code Sample]
// create an instance of BarCodeReader class and specify the image and symbology
BarCodeReader reader;
reader = new BarCodeReader(@"code39Extended.jpg", BarCodeReadType.Code39Extended);
int counter = 0;
// read all the barcodes from the images
while (reader.Read())
{
// display the symbology type
Console.WriteLine("BarCode Type: " + reader.GetReadType());
// display the codetext
Console.WriteLine("BarCode CodeText: " + reader.GetCodeText());
// get the barcode region
Aspose.BarCodeRecognition.BarCodeRegion region = reader.GetRegion();
if (region != null)
{
// Initialize an object of type Image to get the Graphics object
Image img = System.Drawing.Image.FromFile(@"code39Extended.jpg");
// initialize graphics object from the image
Graphics g = Graphics.FromImage(img);
// draw the barcode edges
region.DrawBarCodeEdges(g, new Pen(Color.Red, 1f));
// save the image
img.Save(string.Format(@"edge_{0}.png", counter++));
// fill the barcode area with some color
region.FillBarCodeRegion(g, Brushes.Green);
img.Save(string.Format(@"fill_{0}.png", counter++));
}
}
reader.Close();
//[VB.NET Code Sample]
'create an instance of BarCodeReader class and specify the image and symbology
Dim reader As BarCodeReader
reader = New BarCodeReader("c:\test.jpg", BarCodeReadType.Code39Standard)
Dim counter As Integer
'read all the barcodes from the images
While reader.Read()
counter = counter + 1
'display the symbology type
Console.WriteLine("BarCode Type: " + reader.GetReadType().ToString)
'display the code text
Console.WriteLine("BarCode CodeText: " + reader.GetCodeText())
Dim region As BarCodeRegion
'get the barcode region
region = reader.GetRegion()
If Not region Is Nothing Then
'Initialize an object of type Image to get the Graphics object
Dim img As Image = System.Drawing.Image.FromFile("c:\test.jpg")
'initialize graphics object from the image
Dim g As Graphics = Graphics.FromImage(img)
'draw the barcode edges
region.DrawBarCodeEdges(g, New Pen(Color.Red, 1.0F))
img.Save(String.Format(".\edge_{0}.png", counter))
'fill the barcode area with some color
region.FillBarCodeRegion(g, Brushes.Green)
img.Save(String.Format(".\fill_{0}.png", counter))
End If
End While
reader.Close()
Url: http://www.aspose.com/.net/barcode-component.aspx
Language: C# | User: Sheraz Khan | Created: Aug 19, 2015 | Tags: Mark BarCode Regions in Image read Barcode image mark all barcode regions draw edges around the barcode .NET barcode API recognize barcodes in the image get the region of the barcode,