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AVL.RecognizeBarcode

Extracts information from a barcode located on the input image at a given position.

Namespace:AvlNet
Assembly:AVL.NET.dll

Syntax

C++
C#
 
public static void RecognizeBarcode
(
	AvlNet.Image inImage,
	AvlNet.Rectangle2D inBarcodePosition,
	AvlNet.CoordinateSystem2D? inBarcodePositionAlignment,
	AvlNet.BarcodeParams inBarcodeParams,
	int inScanCount,
	int inScanWidth,
	float inMinEdgeStrength,
	INullable<AvlNet.Barcode> outBarcode,
	out AvlNet.Rectangle2D outAlignedBarcodePosition,
	IList<AvlNet.Segment2D> diagScheduledScanSegments
)

Parameters

Name Type Range Default Description
inImageAvlNet.ImageInput image.
inBarcodePositionAvlNet.Rectangle2DPosition of the input image in which the barcode is located.
inBarcodePositionAlignmentAvlNet.CoordinateSystem2D?Adjusts the barcode rectangle to the position of the inspected object. Default value: atl::NIL.
inBarcodeParamsAvlNet.BarcodeParamsSpecification of barcode that can be read.
inScanCountint<1, INF>5Number of parallel scans run until first successful read. Default value: 5.
inScanWidthint<1, INF>5Width of the single scan. Default value: 5.
inMinEdgeStrengthfloat<0.0f, INF>5.0fMinimal strength of an extracted edge. Default value: 5.0f.
outBarcodeAvlNet.INullable<AvlNet.Barcode>Decoded barcode or nothing if all of the scans failed. This parameter cannot be null.
outAlignedBarcodePositionAvlNet.Rectangle2D
diagScheduledScanSegmentsSystem.Collections.Generic.IList<AvlNet.Segment2D>Scheduled scan segments.

Examples

Rotated barcode.

Low quality barcode printed on plastic foil.

Barcode on package wrapped in plastic foil.

Barcode on blurry image.

Barcode on standard 330ml can.

Barcode on reflective and wrapped surface.

EAN-13 with add-on 2 used to indicate a book edition.

EAN-13 with add-on 5 to give a suggestion for the price.

Remarks

Minimal bar width requirement

To provide precise detection of the barcode width of the thinnest bar should be at least 1.5 pixels.

Depending on the barcode format guard or start/end code patterns must be readable.

Pharmacode usage

The pharmacode barcode type can be read correctly in both directions. To get results from both directions use a Pharmacode and PharmacodeInversed barcode types.

Before decoding a Pharmacode the code orientation angle is normalized to a range from -45° to 135° what makes the code decoding more stable

Results of reading using a different Pharmacode directions: Pharmacode = 23 and PharmacodeInversed = 16.

Using a relative coordinate systems

Read more about Local Coordinate Systems in Machine Vision Guide: Local Coordinate Systems.

Function Overrides

See also