Barcode Xpress for ActiveX v13 - Updated
Recognize a Barcode
User Guide > How To > Recognize a Barcode

Once your image has been acquired and pre-image processing has been performed to recognize the barcode on the image, the following properties must first be set:

Checks Before Barcode Recognition

If possible, the following properties/methods should be set/called before the detection process is started:

Once these properties are set, you are ready to recognize the barcode on the image.

Barcode Xpress detects all barcodes in an image and gives you complete details about them.

If you know where on the image the barcodes reside, setting the ReaderAreaHeight, ReaderAreaWidth, ReaderAreaX and ReaderAreaY values to define a smaller rectangular area on your image will speed up processing. By default these values are set to 0 which tells Barcode Xpress to search the entire image automatically.

Supported Barcodes for Recognition

Barcodes supported for recognition are listed in the Overview. The edition you have enabled will determine exact barcodes.

Use the following methods and properties to recognize the barcode.

Methods

Method Description
AnalyzehDib Detects a barcode within the given DIB for a 32-bit environment.
AnalyzehDib64 Detects a barcode within the given DIB for a 64-bit environment.
AnalyzeIPicture Detects a barcode within the given Picture.
GetBarcodeReaderType Returns barcode type at the specified index value from barcode types list to search for in recognition.
GetBarcodeReaderTypesCount Returns number of barcode types to search for in recognition.
SetBarcodeReaderType Sets barcode type to search for in recognition.

Properties

Property Description

AdditionalReadingPass

Gets and sets a value which determines if an additional processing pass will be performed on a scaled (reduced) version of the original image.
BarcodeInkColor Gets and sets the ink color of barcodes to search for in recognition.
BarcodeOrientation Gets and sets the orientation of barcodes to search for in recognition.
MaxBarcodes Gets and sets the maximum number of barcodes to recognize.
Picture Gets and sets a bitmap for use in barcode recognition.
ReaderAreaHeight Gets and sets the height of the area for the recognition engine to analyze.
ReaderAreaWidth Gets and sets the width of the area for the recognition engine to analyze.
ReaderAreaX Gets and sets the x coordinate of the area for the recognition engine to analyze.
ReaderAreaY Gets and sets the y coordinate of the area for the recognition engine to analyze.
GrayscaleProcessing Gets and sets a value which determines if grayscale processing will be performed on images that are 8bpp or 24bpp.

See the Overview topic for code examples on recognizing barcodes.

See the Acquire an Image for Barcode Xpress for more code examples.

To obtain the results after analyzing the barcode on an image, See the Access Results topic.

 

See Also