LEADTOOLS Barcode (Leadtools.Barcode assembly)

ReadBarcode(RasterImage,LeadRect,BarcodeSymbology[]) Method

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Example 







A Leadtools.RasterImage object that contains the image data. Must not be null.
A Leadtools.LeadRect that specifies the region of interest area in the image where the barcode search and detection is performed. Specify empty rectangle to indicate that the search must be performed on the whole image.
An array of BarcodeSymbology enumeration members that specifies the barcode symbologies (types) to search for.

For information about this method please see ReadBarcode(RasterImage,LogicalRectangle,BarcodeSymbology[]).

Syntax
public BarcodeData ReadBarcode( 
   RasterImage image,
   LeadRect searchBounds,
   BarcodeSymbology[] symbologies
)
'Declaration
 
Public Overloads Function ReadBarcode( _
   ByVal image As RasterImage, _
   ByVal searchBounds As LeadRect, _
   ByVal symbologies() As BarcodeSymbology _
) As BarcodeData
'Usage
 
Dim instance As BarcodeReader
Dim image As RasterImage
Dim searchBounds As LeadRect
Dim symbologies() As BarcodeSymbology
Dim value As BarcodeData
 
value = instance.ReadBarcode(image, searchBounds, symbologies)
public BarcodeData ReadBarcode( 
   RasterImage image,
   LeadRect searchBounds,
   BarcodeSymbology[] symbologies
)

            

            
 function Leadtools.Barcode.BarcodeReader.ReadBarcode(RasterImage,LeadRect,BarcodeSymbology[])( 
   image ,
   searchBounds ,
   symbologies 
)

Parameters

image
A Leadtools.RasterImage object that contains the image data. Must not be null.
searchBounds
A Leadtools.LeadRect that specifies the region of interest area in the image where the barcode search and detection is performed. Specify empty rectangle to indicate that the search must be performed on the whole image.
symbologies
An array of BarcodeSymbology enumeration members that specifies the barcode symbologies (types) to search for.

Return Value

An instance of BarcodeData or one of its derived classes that contains the symbology, data, location and any rotation angle of the barcode found. If no barcodes can be found, then this method will return null.
Remarks

Note: In LEADTOOLS for .NET, the equivalent to Leadtools.LeadRect is Leadtools.Forms.LogicalRectangle.

Example
Copy Code  
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;

      
public async Task BarcodeReader_ReadBarcodeExample3()
{
   string imageFileName = @"Assets\Barcode1.tif";
   // Create a Barcode engine
   BarcodeEngine engine = new BarcodeEngine();

   // Get the Barcode reader instance
   BarcodeReader reader = engine.Reader;

   using(RasterCodecs codecs = new RasterCodecs())
   {
      StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(imageFileName);
      using(RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
      {
         // In the US, UPC barcodes are used to identity products. So, create an array of UPC symbologies
         BarcodeSymbology[] upcSymbologies =
         {
            BarcodeSymbology.UPCA,
            BarcodeSymbology.UPCE
         };

         // Read the first UPC barcode from the image
         BarcodeData barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, upcSymbologies);

         // Show its location and data if found
         if(barcode != null)
         {
            Debug.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
         }
         else
         {
            Debug.WriteLine("Not found");
         }
      }
   }
}
Requirements

Target Platforms

See Also

Reference

BarcodeReader Class
BarcodeReader Members
Overload List

 

 


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Leadtools.Barcode requires a Barcode Module license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features