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ReadMultiplePDF417Codes

Header:	AVL.h
Namespace:	avl
Module:	Datacodes

Detects and recognizes several PDF417 codes.

Syntax

void avl::ReadMultiplePDF417Codes
(
	const avl::Image& inImage,
	atl::Optional<const avl::Rectangle2D&> inRoi,
	atl::Optional<const avl::CoordinateSystem2D&> inRoiAlignment,
	const avl::PDF417CodeParams& inCodeParams,
	const avl::PDF417DetectionParams& inDetectionParams,
	bool inAllowMultipleScales,
	atl::Array<avl::PDF417Code>& outPDF417Codes,
	atl::Optional<avl::Rectangle2D&> outAlignedRoi = atl::NIL
)

Parameters

Name	Type	Default	Description
inImage	const Image&		Input image
inRoi	Optional<const Rectangle2D&>	NIL	Region of interest
inRoiAlignment	Optional<const CoordinateSystem2D&>	NIL	Coordinate system for the region of interest
inCodeParams	const PDF417CodeParams&		Specification of codes that can be detected
inDetectionParams	const PDF417DetectionParams&		Specification of the way the codes are being detected
inAllowMultipleScales	bool	False	Specifies whether codes of different module sizes are expected
outPDF417Codes	Array<PDF417Code>&		Found PDF417 codes
outAlignedRoi	Optional<Rectangle2D&>	NIL	Input ROI after transformation (in the image coordinates)

Optional Outputs

The computation of following outputs can be switched off by passing value atl::NIL to these parameters: outAlignedRoi.

Hints

If codes are not detected, try to use ResizeImage on them before processing with ReadMultiplePDF417Codes.

Remarks

In inCodeParams the parameter MinModuleSize should be more or equal to 3. For values less than 3 it is not guaranteed, that ReadMultiplePDF417Codes will process codes properly.